CA2112570C

CA2112570C - Insect feeding station

Info

Publication number: CA2112570C
Application number: CA002112570A
Authority: CA
Inventors: Claude Paul Genero; Gail Ann Genero
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-10
Filing date: 1992-07-10
Publication date: 2002-07-23
Anticipated expiration: 2012-07-10
Also published as: GB2273031A; GB2273031B; WO1993000803A1; GB9400048D0; CA2112570A1

Abstract

An insect feeding station (10) for administering a fluent substance such as a poisonous liquid bait to ants and other insects.
The feeding station (10) comprises a housing (11) having an interior region (21) adapted to contain the fluent substance. The housing (10) has an opening (27) through which insects can enter and leave the interior region (21), and an internal structure (43) within the interior region (21) for facilitating access by the insects to the substance. The internal structure (43) may take various forms but typically is of a construction which is adapted to at least be partially covered by the substance when the latter is first introduced into the interior region (21) and which is progressibely exposed as the substance is consumed. With this arrangement, the portion of the internal structure which is exposed provides a zone away from the liquid bait for supporting the bodies of dead insects. Thus the bodies are "dry-docked" on the internal structure from where they can be retrieved.

Description

TITLE
Insect Feeding Station FIELD OF THE TNVENTION i--This invention relates to an insect feeding station for administering a substance in fluent form (such as liquid, powder or granules) to insects, particularly crawling insects such as ants.
The invention is.particularly suitable for administering a toxic substance to such insects for the purposes of eradicating them.
BACKGROUND
A common way of eradicating ants is to feed them with a bait comprising a toxic substance such as a liquid mixture of a slow-acting poison and matter attractive to the ants.
Ants take portions of the toxic bait and return to their nest where the toxic bait is transferred to other ants, as is common practice~in the feeding regime of ants. Ants which feed on the poison eventually die. Other ants devour the dead ants, so further transmitting the poison from ant to ant.
While feeding ants with a toxic bait is an effective way of eradicating them, there can be problems associated with presentation of the bait to ants. It is common to use a toxic bait in liquid form and present it to ants in a feeding station comprising a broad, shallow vessel such as a saucer. The feeding station is positioned in the area of the ant infestation, preferably near the nest of the ant colony or on a track followed by ants from the colony.

s~~
~s~3 c~~ ~~'r .;1 _ 2 _ The use of a broad, shallow vessel, such as a saucer, as a feeding station can create problems. One problem is that t the toxic baW is readily accessible to young children and domestic animals. Another problem is that ants can only obtain access to the liquid bait around the pe,~-i;meter of the bait; they cannot obtain access to the inner region of the expanse of the liquid. Furthermore, as ants travel back and forth between their nest and the bait, some of them inevitably die at the feeding station and their bodies are located around the perimeter of the liquid bait. While some of the bodies are removed by other ants and returned to the nest where they can be devoured, other bodies may be difficult to remove from the liquid bait because of the usually sticky nature of the bait. The bodies which are difficult to remove are usually left at the feeding station. This results in an accumulation of bodies at the feeding station around the perimeter of the bait, the perimeter being the only access to the body of toxic liquid for ants. The accumulating bodies make it progressively more difficult and eventually impossible for other ants to gain access to the bait. The difficulty in gaining access to the bait soon deters other ants from visiting the feeding station. This results in the feeding station becoming ineffective, even though there may be a considerable amount of the bait remaining. Additionally, ' because ants can only feed on the liquid bait at, its perimeter, the rate at which the bait can be consumed is limited. The resultant delay in consuming the bait may lead to its deterioration in effectiveness even before ants are deterred from the bait because of difficulty with access. The deterioration of the bait arises primarily '' through exposure to the surrounding environment, particularly as a result of the broad surface area of ' liquid which is exposed to the air. As the liquid deteriorates its surface hardens and becomes glazed. The hardened surface is not appealing to ants and deters them.

DISCLOSURE OF THE INVENTION
The present invention seeks to provide an insect feeding station which can be used to administer a toxic substance to insects and in such circumstances addresses at least some of the problems outlined above.
Broadly, the invention resides in an insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects.

V

The inhibiting means may comprise a plurality of supporting surfaces. The supporting surfaces may be disposed at various levels.
In circumstances where it is desired to kill certain insects such as ants, the substance selected for introduction into the interior region should be toxic to such insects. Where the ant colony is extensive, it may take days or even several weeks to eradicate the ants.
Preferably, the part of the internal structure which is progressively exposed provides a zone away from the fluent substance which can support the bodies of insects, the zone being disposed inwardly of the periphery of the area.
Conveniently, the substance is in liquid form.
Preferably, the internal structure has an open construction within which the fluent substance can be received and within which insects can move to obtain access to the fluent substance.
Preferably, the opening is above the interior region.
In one arrangement the means for defining an opening may simply comprise an aperture in the housing. The aperture may be provided with a closure which is removable to allow the movement of insects into and out of the interior region. In another arrangement means for defining an opening may comprise a portion of housing which can be ruptured to form the opening.
There may be more than one such opening, if desired.

The opening may be in opposed relation to the bottom with respect to the interior region. The opening may provide a means for introducing the fluent substance into the interior region of the housing whereby in use insects are able to follow the path along which the substance flowed into the interior region.
Conveniently, the opening provides an inlet opening through which the fluent substance is introduced into the interior region, the opening being so positioned in relation to the internal structure that the fluent substance so introduced can pour onto said at least part of the internal structure.
Because the internal structure is progressively exposed as the substance is consumed, insects can obtain access to the unconsumed portion of the substance even though other parts of the internal structure may be occupied by the bodies of dead insects. The internal structure may serve to prevent contamination of the toxic substance by bodies of dead ants.
This occurs because the internal structure can retain the bodies of dead ants in place while the level of the toxic substance progressively falls as it is consumed. Thus, the bodies of dead ants are separated from the remaining toxic substance.
The internal structure may be of a configuration which ensures that insects always have access to the substance contained within the interior region. More particularly, the internal structure may be of such a construction that in use the interior region does not become clogged with bodies of dead insects so ensuring that the remaining fluent substance is always accessible to other insects.

One form of the internal structure may comprise at least one upstanding formation within the interior region for parting the substance. In one arrangement, the upstanding formation may comprise a wall structure dividing the interior region into a plurality of reservoirs each adapted to contain a portion of the substance. The wall structure may comprise one or more walls. The reservoirs formed by the wall structure are preferably elongated, each being of a width which is thin and a depth which is shallow in relation to the length thereof. Conveniently, the elongated reservoirs are disposed in side by side relationship.
In another arrangement, the upstanding formation may comprise a plurality of spaced ribs onto which the insects can climb to gain access to the substance.
The separation of dead bodies from the toxic liquid clears at least some of the bodies from the surface of the liquid and so ensures that there is access to the toxic liquid for other ants. The bodies which have been separated from the liquid can be retrieved later by other ants.
Another form of the internal structure may comprise an open porous structure having interstices through which the insects can pass. Conveniently, the open porous structure is formed by a mass of fibrous material.
Another form of the internal structure may comprise a partition structure dividing the interior region into a plurality of feeding chambers one above another.
The partition structure may in one arrangement comprise a plurality of partitions spaced vertically with respect to one another. A passage may extend between adjacent feeding chambers so that insects can pass therebetween. The passage between adjacent feeding chambers may comprise an opening associated with each partition. The opening may be formed in the partition or may be located at a side or end thereof.
The partitions may each be adapted to define a reservoir arrangement for containing a portion of the substance. The reservoir arrangement on each partition may comprise a plurality of reservoirs so arranged so that surplus substance can flow from one reservoir to another.
The partition structure may in another arrangement comprise a plurality of perforated partitions in spaced apart relationship, the perforations being of a size through which insects can pass.
Another form of internal structure may include a plurality of lateral protrusions at least some of which are positioned one above another. The lateral protrusions may be so arranged that feeding chambers are defined therearound.
Conveniently, the housing comprises a front wall and a rear wall in spaced apart relationship.
The housing may define a plurality of interior regions which are positioned one in front of another and each of which has a respective one of the internal structures.
Where the housing has only one interior region, the latter is defined between the front and back walls. Where the housing has a plurality of interior regions positioned one in front of another, such regions may be disposed between the front and rear walls and separated one from another by internal walls.

In the case where the internal structure comprises a partition structure, the or each partition of the partition structure preferably extends between the respective walls defining the particular interior region.
Another form of internal structure may comprise a plurality of discrete reservoirs. The reservoirs may be arranged so that surplus substance can flow from one reservoir to another.
The interior region may have a top wall, with an upper chamber being defined in the housing above the top wall.
Conveniently, the means defining an opening by which insects can enter and leave the interior region comprises an aperture formed in the top wall.
The upper chamber may be adapted to contain a quantity of the substance and the upper chamber may have means through which the substance contained therein can pass into the interior region. Such means may comprise the opening through which insects can pass.
The fluent substance may be introduced into the housing by a user or the feeding station may be delivered for sale or otherwise provided to the user with the substance contained therein.
In another arrangement, the internal structure comprises an internal wall which divides the interior region into first and second chambers, the internal wall having a face exposed to the second chamber, the first chamber being adapted to contain fluent substance in liquid form and the second chamber being accessible to insects, and at least one hole in the internal wall extending between the two chambers, the or each hole being so dimensioned that insects within the second chamber are excluded from the first chamber and that in use liquid in the first chamber can ooze through the hole into the second chamber.
Preferably, the or each hole is so constructed that liquid oozing therethrough forms a liquid globule on the face of the internal wall whereby insects in the second chamber can move along said face to obtain access to the liquid globule formed thereon.
There may be a plurality of such holes in the internal wall.
Preferably, the internal structure functions to strain the surface of the fluent substance as it progressively falls to remove bodies of dead insects therefrom. In this way the bodies are effectively "dry-docked" on the internal structure from where they can later be retrieved, for instance by other insects.
The internal structure may, in still another arrangement, comprise a plurality of internal walls defining reservoirs therebetween each adapted to receive and contain a portion of the fluent substance, the reservoirs being so dimensioned that fluent substance contained therein is shallow in relation to the exposed surface area thereof.
The internal structure may, in still another arrangement, comprise a plurality of discrete reservoirs each adapted to receive and contain a portion of the substance, each reservoir being so dimensioned that in use the bottom of the reservoir is exposed before bodies of insects can accumulate to an extent to create a barrier preventing insects from obtaining access to the remaining substance in the reservoir.
In another form the invention resides in an insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects and wherein said inhibiting means comprises a plurality of supporting surfaces disposed at various levels.
In still another form the invention resides in an insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, wherein said inhibiting means strains the surface of the substance at various levels as it progressively falls for removing bodies of insects therefrom to at least inhibit clogging of the substance by said bodies.
In yet another form the invention resides in an insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, the internal structure being of a construction which is adapted to be at least partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the substance is consumed, at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, wherein the interior region has a wall and wherein said inhibiting means comprises a plurality of discrete protrusions extending laterally of said wall, at least some of the protrusions being positioned one above another.
In yet another form the invention resides in an insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means 17/E17/2001 20:40 +61--B-92456100 G&C GENERO PAGE 11 - BE -fox' inhibiting the acc;t;~u:lation of bodies of insects in the substance as the substan~:e is consumed by the insects, said at least part of the internal structure comprising a plurality of internal walls defii.ning discrete reservoix's in spaced 2~part relations.~-yp, each reservoir being adapted to reoeive dnd contain a. portion of t~7,e substance with a.
surface there~~f exposed.
In still another form the invention resides in an insect feeding station for administering a liquid substance to insects, comprising a kio~using havin-q a wall and an inter2or region adapted to contain the liquid substance, a boundary of the interior region being defined by the wall, tk~e wall having an inner side u~Y~ac:h canfroz~ts the interior region and an exterior ride on i~he opposed side thereof, an internal structure within the i.z~ate=riot region for facilitating access by the iz~sects to the suk~stance, said at least part of the ix7,ternal structure C~e~m~ar-icing means for inhibiting t:ne accumulation of bodies of 7.x~sects in the substance as the substance is consumed. by the insects, the Wall being provided with at Leasi~ one hole so aimensioned that insects afe excluded from entering the anterior region through, the hole arid than in use the liquid substance in the interior region can ooze through t:he hole to form a globule of liquid on the exter~_or side thereof which remains at the hole for consumption, wherein :in.sects can obtain access to the wall for consuming the globuls~ of liquid formed at the hole.

17/f~7/2001 20:40 +61-8-92456100 G&C GENERO PAGE 12 In yet anotYrex form the. invention ,resides in ari insect feeding station for <zd~miW stering a fluent substance to insects, comj~rising a housing having an interior region adapted to contain they s~.~bstance, the intexior region having a botto7m wall., means far cteflning an opening an the housing through which insects ~:an enter the intexior region, and an interl'~al stx'ucture within the interior regiol'a for facilitating access by insects to the substance, and an area within the 3,nterior rf=gion whero in use the substance is contained entire~.y by ride wall means and said bottom wall, said bottom wall l7av:ir.g a perimeter which is entirely surrounded by said s:i<_~e wall means,, said bottom wall and said side wall means being devoid of any opening therein where the substance :,> contained, at least part of said interxral structure being located within said area and within the confines of surd SidES Wall means, said at least part of the internal struct:m:e being adapted to be at least partially covered by the substance when the substance is first introdtaced into the interior region. and pfog,fessively exposed as the level of the substance at w2liCh insects deed progressively falls t;~pon consumption of the substance, wherein said at least part of the internal structure provides a means for si~ra~,ning the surface of tho substance at va7~ious levels as i~~ progressively falls for xemoving bodies o~ insects the~_~efrozn to at i.east inhibit clogging of the substance by said L~odies and wherein said at least part of the intexwaJ~ structux:a being of an open construction having inter5tice3 a~ vrarious levels through wkiich insects can move while being :supported on said at least part o~ the ~,nternal structure to obtalzl access ~o the substance.

17/07!2001 20:40 +61-8-92456100 G&C GENERO PAGE 13 8~ _ In still another form the invention resides in an i.nseCt Feeding station for admir~istering a fluent subst=ance to insects, compri,szng a hbusing having an z.nterior region adapted to conta~.n the substance, means for defining an opening in the housing through which insects can enter and leave the intera.or region, and an internal stz:ucture within the intexior region for facilitating access by the insects to the substance, tree internal -3tx'uGture being of a construction wh~~,c.h is s'~dapted to at least be partially cQVcred by the substarvce when the substance is first introduced into the interior ragion and which is progressively exposed as the substance is consumed, whexeir~
the ii7terio~- region has a wall anct wherein the internal structufe includes a plurality of discrete protrusions extending substantially laterally of said wall for inhibiting the accumulation of boci~,cs o2 insects in the substance as the substance is consumed, at least some of the protrusions being posit~i~oned one above alf7Othef, wherein at least part of the intE:rnal structure being of an open construction having interstices at v'~Y~ibus levels through which insects 'can move while being supported on said at least part of the internal structure to obtain access to thp sub8t$nce.
In oz~e arrangement the p~c~trusions may comprise slender rods.

17/07/2001 20:40 +61-8-92456100 G&~ 6ENERU PAGE 14 - $H -BRIEF DESCRIPTION OF THE DRAWINGS
The invention wili be better understood by reference to the following description of several specific embodiments thereof a~ shown in the accompanying r~~aWirigs in which:
Fig. 1 is .a schematic perspective view of az'~ insect feeding station according to a first embodiment;
Fig. 2 is a view similar t.o Fig. 1 with the exception that tile front wail thereof is depzcted in its transparent condition to reveal the interior of the insect feeding stat iozt:
Fig. 3 is a front elavat~.ona1 view of the insect feeding station, with a toxic substance shown contained within the feeding station tiz~d ants feeding on the sub8tanc2;
E'~.g. 4 is a cross-sectional. view of the insect feeding station of Fig. 3:
Fig. 5 is a fragment:axy view, on an enlarged soale, of part of Gk~e interior of the insect feeding station;
Fig. 6 ,is a fragmentary view, on an enlarged scale, of further part of the interior of the insect feeding station, showing in particular detail of an access opening through.which insects can enter and leave the interior of the feeding station;
Figure 7 is a fragmentary view of a modified,'-~ferm of the access opening shown in Figure 6;
Figure 8 is a fragmentary view of the insect feeding, station mounted onto a wall in close proximity to a track followed by ants with a trail extending between the track and the insect feeding station;
Figure 9 is a fragmentary elevational view of a modified form of rear wall for the insect feeding station of the first embodiment;
Figure 10 is a fragmentary side view of the rear wall;
Figure 11 is a side view of the insect feeding station of the first embodiment fitted with a cover;
Figure 12 is a fragmentary view of an insect feeding station according to a second embodiment;
Figure l3 is a schematic view of an insect feeding station according to a third embodiment;
Figure 14 is a schematic front view of an insect feeding station according to a fourth embodiment;
Figure l5 is a schematic side view of an insect feeding station according to a fifth embodiment.
Figure l6 is a fragmentary view on an enlarged scale of the insect feeding station of Figure 15;
Figure 17 is an isometric view of part of the insect feeding station of the sixth embodiment;
Figure 18 is a schematic side view of an insect feeding station according to a seventh embodiment;
Figure 19 is a fragmentary view of the insect feeding station of Figure 18;
Figure 20 is a schematic side view of an insect feeding station according to an eighth embodiment;
Figure 21 is a schematic elevational view of an insect feeding station according to an ninth embodiment;

WO 93/00803 PCTlAU92/00340 Figure 22 is a sectional view of a portion of the insect feeding station of Figure 21;
Figure .23 is a fragmentary view of an insect feeding section according to a tenth embodiment;
Figure 24 is a plan view of , a perforated partyt~-ton which forms part of the feeding station;
Figure 25 is an elevational view of an insect feeding station according to an eleventh embodiment; and Figure 26 is a cross-sectional view of the insect feeding station of Figure 25.
$EST MODES OF CARRYING OUT INVENTION
The various embodiments shown in the drawings are each directed to a feeding station for administering a toxic substance to ants for the purpose of eradicating them.
The substance is a toxic liquid comprising a mixture of a slow acting poison and matter which is attractive to ants.
Referring to Figures 1 to 11, the insect feeding station according to the first embodiment comprises a housing 11 having a front wall 12 which is transparent and a rear wall 13 spaced apart from the front wall, the rear wall extending upwardly beyond the front wall to provide an exposed rear portion 14. A peripheral wall 15 extends between the front wall 12 and the rear wall 13. The peripheral wall 15 forms the sides 17 and the bottom 19 of an interior region 21 defined within the housing, the interior region being disposed between the front and rear walls. The interior region 21 has a top wall 23 which extends between the two sides 17 in one direction and ' between the front and rear walls 12 and 13 respectively in another direction.
The top wall 23 is disposed below the upper edge of the front wall with the result that an upper chamber 25 is - m -formed in the housing within the region above the top wall 23. The top end of the upper chamber 25 is open. The top wall 23 is configured so that it slopes downwardly and inwardly to a central opening 27 defining an aperture which communicates with the interior region 21,.=-With this arrangement, the top wall 23 is defined by two sloping sections 29, each of which terminates at a depending flange 31 at the periphery of the opening. The central opening 27 is also disposed within a constriction 33 formed in the front and rear walls, as best seen in Figure 4. The constriction 33 has opposed inner faces 34 which define the sides of the central opening 27. With this arrangement, steps 35 are defined between the sides 34 of the central openings 27 and the inner surface of the front and rear walls 12, 13.
The central opening 27 is of such a size that ants can enter and leave the interior region 21 through it via the upper chamber. The toxic substance in liquid form for use in eradicating ants can also be introduced into the interior region 21 through the central opening 27. The toxic liquid is poured into the upper chamber 25 from where it can drain into the interior region 21 through the central opening. A marking 36 associated with the upper chamber 25 provides a visual indication of the amount of toxic liquid which should be poured into the upper chamber 25 to fill the interior region as will be described later.
The top wall 23 is of a construction which inhibits egress of toxic liquid from the inner region 21 in the event that the housing is tipped sideways or inverted. In such a situation, the toxic liquid flows into, and is contained within, the upper part 37 of the inner region 21 defined between the sides 17 and the sloping sections 29 of the top wall 23. The depending flanges 31 and the steps 35 WO 93/00803 PC.'TlAU92/00340 -also assist in containing the toxic liquid within the interior region. ' A modified form of central opening 27 is shown in Figure 7 of the drawings . In the modified form, ~.'~e central opening includes a tubular portion 39, the internal passage 41 of which provides the communication between the upper chambers 25 and the interior region 21. A liquid seal exists between the front and rear walls 12, 13 and the tubular portion 39 so that the passage within the tubular portion provides the only path for communication between the upper chamber 25 and the interior region 21.
The housing 11 has an internal structure 43 within the interior region 21. The internal structure 43 is adapted to facilitate access of ants to the toxic liquid contained within the interior region. In this regard, the internal structure is adapted to be at least partially covered by the toxic liquid introduced into the interior region 21 and progressively exposed as the substance is consumed by the ants.
In this first embodiment, the internal structure comprises a partition structure 45 having a plurality of partitions 47 spaced vertically with respect to one another. The partitions 47 divide the interior region 21 into a plurality of feeding chambers 49 one above another.
An opening 5l is associated with each partition 47 so that insects and toxic liquid can pass between the feeding chambers 49. For some partitions 47a, the opening 51 is formed centrally in the partition and the partition extends to the sides 17 of the interior region 21. Far other partitions 47b, there are.two openings 51 located at the ends of the partition. With the latter arrangement, the partitions 47b do not extend to the sides 17 of the 13 - ~
interior region and the openings 51 are defined between the ends of the partitions and the sides 17.
Each partition extends between the front and rear walls 12 and 13 respectively and is configured to def.~rr~ a shallow reservoir 50 for containing a'portion of the toxic liquid introduced into the interior region 21. For this purpose upstanding lips 53 are provided on the partition 47 at location adjacent the openings 51. The lips 53 provide weirs over which surplus toxic liquid can flow. The bottom section of the interior region 21 also constitutes one of the reservoirs 50.
The partitions 47a and 47b are arranged alternately so that each opening 51 is disposed above one of the reservoirs. In this way, toxic liquid introduced into the interior region can progressively cascade from one reservoir to the next, filling each reservoir in turn.
The marking 36 provides an indication as to the quantity of toxic liquid which should be introduced into the upper chamber 25 to fill all of the reservoirs 50 within the interior region.
In this embodiment, the housing 11 is formed in two parts which are bonded.together, the first part comprising the front wall 1l and the second part comprising the rear wall 13, the peripheral wall 15 and the internal structure 43.
The two parts can be formed by way of a vacuum forming process and bonded together along bond lines 54 at the peripheral wall 15, the top wall 23 and the partitions 47.
The bond between the two parts may be of any suitable form such as plastic welding and provides,a liquid seal along the bond lines.
Operation of the insect feeding station according to the first embodiment will now be described with particular -reference to Figures 3 and 5 of the drawings in which ants are identified by reference numeral 58 and in particular ants feeding on the toxic liquid are identified by reference 58a, bodies of dead ants are identified by reference 58b and ants retrieving bodies of deat~-~~ants are identified by reference 58c:
To use the insect feeding station for the purpose of eradicating a colony of ants, the feeding station 10 is mounted on a wall in close proximity to a track along which ants 58 from the colony travel to and from their nest. The feeding station can be mounted on the wall in any suitable way such as by means of a small mass of adhesive putty 55, as shown in Figure 8. The putty 55 is pressed into adhesive contact with the wall and the rear wall 13 of the housing 1I is pressed into adhesive contact with the putty, leaving a portion of the putty exposed to provide a ramp over which a trail 57 of the toxic liquid or other material attractive to ants is laid between the ant track and the opening 27 in the feeding station for the purpose of diverting the ant track to the feeding station. ,Ants 58a enter the uppermost feeding chamber 49 within the feeding station through the opening 27 and commence to consume the toxic liquid contained in the uppermost reservoir. The ants do not advance beyond the uppermost feeding chamber while there is sufficient toxic liquid in the uppermost reservoir for them. Because of the, shallow nature of the -uppermost reservoir, the contents of the reservoir can be consumed before bodies of dead ants 58b accumulate to an extent that would be obstructive to other ants. Once the toxic liquid in the ' uppermost reservoir has been consumed, ants 58c can then retrieve many of the dead bodies and return them to the nest where they can be devoured. This provides another way in which the poison is transmitted from ant to ant in the colony. The retrieval of bodies of dead ants is ~~~2~~'I~~

particularly useful in the operation of the feeding station as it prevents clogging of the feeding station, and keeps the feeding station clean and ready for further use.
Further ants from the colony then progress to the next feeding chamber via the opening 5l~and cammence to consume the toxic liquid contained in its reservoir. The cycle is repeated until either the ant colony is eradicated or all of the toxic liquid is consumed. In the latter case, the eradication procedure can be continued by simply pouring a further quantity of toxic liquid into the feeding station so as to again fill the reservoirs. At no stage of the eradication procedure does the feeding station become clogged with bodies of dead ants and so remaining toxic liquid is always accessible to ants from the colony.
Because of the transparent nature of the front wall 12, the eradication procedure can be viewed and monitored as required.
If the location at which the insect feeding station is such that it is. not desirable to lay a trail 57 of material attractive to ants on the wall, the material can be confined to the exposed portion 14 of the rear wall 13 of the housing. Provided that the exposed gortion 14 of the rear wall is located sufficiently close to the ant track, ants will still be~ attracted to the feeding station.
As shown in Figures 9 and 10 of the drawings, the rear wall l3 of the housing 11 may be formed with an extension portion 59 the free end of which can engage the wall. The extension portion thus provides a ramp between the wall and the exposed portion 14 of the insect feeding station over which a liquid trail can be laid to entice ants into _ .
the feeding station. With this arrangement, adhesive putty (not shown) can be used to mount the insect feeding station, on the wall but it can be hidden behind the rear wall.
~. _~-Referring now to Figure 11, a cover 61 can be mounted on the front of the insect feeding station to obscure it from view. This may be desirable at locations where it could be considered unsightly to have an insect feeding station on display. The cover 61 comprises a cover portion 63 and a mounting portion 65 affixed to the cover portion. The mounting portion 65 is adapted to releasably engage the top edge of the front wall 12 to mount the cover in position. The cover can serve to create reduced light conditions within the feeding station, which may be useful if the eradication procedure is directed to insects which have preference for feeding in darkness. The cover can also serve to offer some protection to the insect feeding station against weather conditions when it is mounted in external locations.
The feeding station of the first embodiment has been described as an arrangement in which a user introduces the toxic liquid into the interior chamber when the feeding station is to be used. In an alternative arrangement, the feeding station can be supplied to the user with toxic liquid contained within the housing. In such an arrangement, the quantity of toxic liquid would be stored in the upper chamber 25 and contained in place by a first removable closure (such as a plug) in the central opening 27 and a second removable closure (such as a tear-off strap) at the top of the upper chamber. When the feeding station is to be used, both of the closures would be removed so allowing the toxic liquid to drain from the upper chamber 25 into the interior region 21.

17 ~ ~.~.~.~ ~ ri The embodiment shown in Figure 12 of the drawings is similar to the first embodiment with the exception that an upstanding formation 67 is provided in each reservoir.
The upstanding formation 67 comprises a plurality of spaced apart ribs 69 which are supported on th~upperside of each partition 47 and the bottom 19. The ribs 69 extend between the opposed ends of the reservoir and divide the reservoir into sections separated from one another. The ribs also function as landings over which the ants can move to gain access to all of the toxic liquid.
The embodiment shown in Figure 13 of the drawings is also somewhat similar to the first embodiment with the exception that each partition 47 extends to one side 17 of the interior region and the associated opening 51 is defined between the end of the partition arid the other side 17. The partitions 47 are inclined downwardly towards the respective openings 51 and alternate partitions extend to opposed sides 17 of the interior region 21. With this arrangement, the toxic liquid can cascade from one partition to the next partition. Riffles 71 extend across each partition 47 between the front and rear walls of the housing. The riffles 71 are located at spaced intervals along the partition and a reservoir 50 is formed between adjacent riffles. The riffles 71 define weirs over which surplus toxic liquid can f low from one reservoir to another and ultimately to the opening 51. In this embodiment the upper chamber 25 defined above the top wall 23 of the interior region 21 has an opening 73 through which toxic liquid can drain into the interior region 21. There is a separate opening 75 disposed alongside the upper chamber 25 through which ants can enter and leave the interior region 21.

In the embodiment shown in Figure 14, the internal structure 43 comprises a plurality of concave elements 77 each arranged to define a reservoir for containing a portion of the toxic liquid. The elements 77 extend between the front and rear walls of the housinr~.'..~ and are arranged in rows which extend between the sides 17, the elements in each row being in spaced apart relation with one another. The rows are offset one from another so that surplus toxic liquid from one reservoir can cascade into a reservoir in the row immediately below.
In the various embodiments described previously, there is a single interior region 21 between the front and rear walls 12, 13 of the housing 11. In other embodiments there may be a multitude of such interior regions. An example .of such an embodiment is illustrated in Figures 15, 16 and 17 of the drawings. In this embodiment, the housing 11 comprises the front wall 12, the rear wall 13 and several inner walls ?9 between which the interior regions are defined. While not shown in the drawings, the housing 1l is of a similar construction to the first embodiment inasmuch as it has a top wall with. a central opening through which ants can enter and leave. Each interior region has an internal structure which in the embodiment is formed by a plurality of lateral protrusions 8l on the front wall 12 and on each internal wall 79. The lateral protrusions 81 on each wall are in spaced apart relationship. Apart from forming the internal structure, the lateral protrusions function as spacers between the various walls. Apertures 83 are provided in each inner wall 79 to provide for liquid communication between the inner regions 21. This allows the liquid level to remain substantially constant in the various liquid regions. The lateral protrusions 81 provide an arrangement on which the ants can crawl for extensive access to the toxic liquid.
As the toxic liquid is consumed its level falls and more WO 93/00$03 PCT/AU92/00340 - 19 - _21~.~:~'~~
of the protrusions 81 are exposed. The protrusions provide landings from which ants can feed and on which ants can die. The landings provided by the protrusions also serve to strain the surface of the toxic liquid as its level falls so as to extract at least ~ci~te of the bodies of dead ants which had previously fallen into the liquid. The bodies of the dead ants are effectively "dry-docked" on the landings from where they can later be retrieved by other ants. The retrieved bodies can be returned to the nest of the ant colony or discarded. If desired, the upper surfaces of the lateral protrusions can be configured to define reservoirs.
The -embodiment shown in Figures 18 and 19 of the drawings is also directed to an insect feeding station in which the internal structure 43 does not define reservoirs for containing the toxic liquid but rather provides an arrangement which ants can crawl on to gain access to the toxic liquid and which can retain the bodies of dead ants.
In this embodiment, the internal structure 43 comprises an open porous structure having interstices through which the ants can pass. The open porous structure is.formed by a tangled mass of fibrous material. The ants can crawl through the mass of fibrous material and along individual fibres to reach the toxic liquid contained within the housing 1l. Because of the nature of the fibrous mass, it provides extensive access for ants to the toxic liquid.
The mass of fibrous material can retain the bodies of dead ants in position, however if a body does happen to fall into the liquid it is likely to be caught in a lower section of the fibrous material and so ultimately removed from the toxic liquid when the level thereof falls below the position at which the body of the dead ant is caught:
It will be understood that the fibre size of the mass of fibrous material can be selected to provide best results in accordance with the typical size of the type of ant or - 20 - .. , other insect being targeted. While not shown in the drawings the housing has a top wall incorporating a central opening through which ants can enter and leave the interior region. As with earlier embodiments, the feeding station of this embodiment, can be supplied to ~..=user 'with toxic liquid in the housing if desired. In this instance, the toxic liquid can be contained in the interior region 21 rather than the upper chamber at the point of sale.
The embodiment shown in Figure 20 is directed to an insect feeding station in which the internal structure 43 comprises an upstanding formation 87 in the form of a wall formation dividing the interior region 21 into a plurality of elongated reservoirs 85 which extend between the opposed sides of the housing and which are in side by side relation. Each reservoir 85 is thin and shallow in relation to its length. The wall formation preferably comprises a plurality of solid walls 89 between which liquid does not flow. As before, while not shown in the drawings, the housing 11 has a top wall incorporating a central opening.
The embodiment shown in Figures 21 and 22 is, directed to an ant feeding station comprising an inner portion 91 and an outer portion 93 which is adapted to be mounted on the v inner portion to provide a cover therefor. The inner portion'91 comprises a body 95 having an interior zone 97 surrounding an inner peripheral wall 99. The inner wall 99 encloses a sgace lOl which is open at the bottom. The body is supported on feet 102 which provides clearance below the body to provide access for ants to the space 101. The inner wall 99 defines an opening 103 at the upper end of the space 101 which opens onto the interior zone and through which ants can enter and leave the interior region. The body 95 has a plurality of annular reservoirs 105 in a tiered arrangement, with each _ 21 reservoir being offset in the inward direction in relation to the reservoir immediately below it. The reservoirs are adapted to contain toxic liquid to which the ants can gain access from the inner zone via access openings 106. Each reservoir has a notch 107 which provides a we,a'r~from which surplus toxic liquid can flow to the next reservoir. A
filling chamber 109 is provided at the top of the body.
The filling chamber 109 has a notch 111 which also provides a weir through which toxic liquid can flow into the uppermost reservoir. The notch 111 is relatively small in its flow area with the result that toxic liquid can only drain slowly from the filling chamber, thereby allowing the filling chamber to be filled to a specified level which provides an indication as to the quantity of toxic liquid which should be introduced to fill the reservoirs. In a modified arraiagement, the reservoirs may be combined into a continuous helical formation rather than each being of an annular formation. In the modified arrangement, ripples or other elements would be provided to divide the helical formation into sections each of which functions as a reservoir.
The insect feeding~station shown in the embodiment of Figs 23 and 24 is similar to the first embodiment in that the internal structure 43 comprises a partition structure 45 which divides the interior region 21 into a plurality of feeding compartments 49. In this embodiment, however, the partition structure -comprises a plurality of perforated partitions 115 formed of mesh material. The partitions are of such size that ants can pass therethrough to move from feeding chamber to feeding chamber. The perforations are not, however, so large as to prevent ants from easily crawling along the partitions to move within each feeding chamber. The partitions 115 are in spaced apart relationship, the spacing being such that ants on one partition can reach through the '~'~,, ~ -- 2 2 ' _.
perforations in that partition to consume the toxic liquid in the feeding chamber immediately below until the level of the toxic liquid in that chamber falls to the partition at the bottom of the chamber. The ants can then advance into the feeding chamber which they had previou5~ emptied of toxic liquid. In other words, ants can occupy a feeding chamber which they had previously emptied of toxic liquid and consume toxic liquid in the feeding chamber immediately below the chamber that they are occupying. In this way, the ants have access to the toxic liquid for feeding without having to stand in the toxic liquid. The partitions 115 also act as landings on which the bodies of dead ants can be "dry-docked" for subsequent retrieval.
The embodiment shown in Figures 25 and 26 is directed to an insect feeding station comprising a housing 11 having a front wall 12, a rear wall 13 and a peripheral wall 15 extending between the front and rear walls. The peripheral wall 15 forms the sides 17 and bottom 19 of the interior region. An interior region 21 is defined between the walls. An internal~structure 43 is provided within the interior region. The internal structure 43 comprises an internal wall 120 which is spaced from the front and rear walls and which extends between the sides 1? of the interior region. The internal wall 120 divides the interior region into first and second chambers, being a liquid chamber 121 and a feeding chamber 122. The internal wall 120 has a plurality of small holes 124 formed therein~extending between the two chambers. The liquid chamber 121 is adapted to contain toxic liquid and the holes 124 formed in the internal wall 120 are of such a size that toxic liquid can ooze through the holes to form a globule on the internal wall within feeding chamber. Ants 58 within the feeding chambers 122 feed on the globules and in this way have access to the toxic liquid. As the globule at each hole 124 is consumed, another globule develops.
The liquid chamber 121 has a tog wall 123 with a central opening 127. An upper chamber 131 is defied-above the top wall 123 between the rear wall 13 and the internal wall 120. The upper chamber is open at its top and is adapted to receive a supply of tonic liquid which can then drain into the liquid chamber 121. The opening 127 is of such a size which is sufficiently large to allow drainage of the liquid therethrough but which is sufficiently small to inhibit entry of ants into the liquid chamber.
The feeding chamber 122 has a top wall 133 with a central opening 137. An upper chamber 138 is defined above the top wall 133 between the front wall 12 and the internal wall 120. The upper chamber 138 is open at its top. A
ramp 139 is provided at the top edge of the internal wall 120. The ramp extends rearwardly to the rear wall 13 and provides a pathway for ants to reach the upper chamber 138 from where they can enter and leave the feeding chamber 122 via the opening 137. Because it is required to accommodate passage of ants, the opening 137 is larger than the opening 127. The ramp 139 does not unduly obstruct the open top of the upper chamber 131.
The arrangement in this embodiment where the liquid chamber 121 and the feeding chamber 122 are separated is particularly useful. It ensures that ants in the feeding chamber are separate from the liquid in the feeding chamber. Consequently, dead ants within the feeding chamber can be retrieved with relative ease.
The feeding chamber can serve a secondary function as a basin for capturing any globules which drip from the holes 124 before .being consumed.

From the foregoing, it is evident that the various embodiments provide insect feeding stations which are simple and convenient to use. The feeding stations are environmentally friendly in the sense that they can be re-used as required and are not intended to be discarded after a single use. Additionally, the feeding stations prolong the life expectancy of the toxic liquid through restricted contact of the liquid with air as compared to the prior art arrangement of a broad shallow vessel, such as a saucer.
The longer life expectancy of the liquid results in less wastage which is not only beneficial to the environment but also provides cost savings.
It should be appreciated that the invention is not limited to the scope of the various embodiments described. While many of the embodiments have been described as having an upper chamber for receiving toxic liquid and a central opening through which the toxic liquid can drain from the upper chamber into the interior region, it should be appreciated that such features are only optional. The interior region of each feeding station could simply be open at its upper end to allow for the introduction of toxic liquid into the region as required and to allow ants to enter and leave the region.
Throughout this specification (including the claims) unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

Claims

-25-

1. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects.

2. An insect feeding station according to claim 1 wherein said at least part of the internal structure which is progressively exposed provides a zone away from the fluent substance which can support the bodies of insects, said zone being disposed inwardly of the periphery of said area.

3. An insect feeding station according to claim 1 or 2 wherein the internal structure has an open construction within which the fluent substance can be received and within which insects can move to obtain access to the fluent substance.

4. An insect feeding station according to claim 1, 2 or 3 wherein the opening is above the interior region.

5. An insect feeding station according to any one of the preceding claims wherein the internal structure comprises at least one upstanding formation within the interior region for parting the substance.

6. An insect feeding station according to claim 5 wherein the upstanding formation comprises a wall structure dividing the interior region into a plurality of reservoirs each adapted to contain a portion of the substance.

7. An insect feeding station according to claim 6 wherein the wall structure comprises a plurality of walls.

8. An insect feeding station according to claim 6 or 7 wherein the or each reservoir is elongated, each being of a width which is thin and a depth which is shallow in relation to the length thereof.

9. An insect feeding station according to claim 6, 7 or 8 wherein the elongated reservoirs are disposed in side by side relationship.

10. An insect feeding station according to any one of claims 1 to 4 wherein said at least part of the internal structure comprises an open porous structure having interstices through which both the insects can pass and the fluent substance can flow, said at least part of the internal structure providing means for supporting the bodies of insects.

11. An insect feeding station according to claim 10 wherein the open porous structure is formed by a mass of fibrous materials.

12. An insect feeding station according to any one of claims 1 to 4 wherein the internal structure comprises a partition structure dividing the interior region into a plurality of feeding chambers one above another.

13. An insect feeding station according to claim 12 wherein a passage extends between adjacent feeding chambers so that insects can pass therebetween.

14. An insect feeding station according to claim 12 or 13 wherein the partition structure comprises a plurality of partitions spaced vertically with respect to one another.

15. An insect feeding station according to claim 14 wherein the passageway between adjacent feeding chambers comprises an opening associated with each partition.

16. An insect feeding station according to claim 15 wherein the opening is formed in the partition.

17. An insect feeding station according to claim 15 wherein the opening is located at one side of the partition.

18. An insect feeding station according to any one of claims 14 to 17 wherein the partitions are each adapted to define a reservoir arrangement for containing a portion of the substance.

19. An insect feeding station according to claim 18 wherein the reservoir arrangement on each partition comprises a plurality of reservoirs so arranged so that surplus substance can flow from one reservoir to another.

20. An insect feeding station according to claim 18 or 19 wherein the reservoirs are each provided with at least one rib dividing the reservoir into sections.

21. An insect feeding station according to claim 12 or 13 wherein the partition structure comprises a plurality of perforated partitions in spaced apart relationship, the perforations being of a size through which the insects can pass.

22. An insect feeding station according to claim 21 wherein the spacing between adjacent partitions is such that an insect can stand on one partition and consume substance which is at a level above the next partition immediately therebelow until such time as the level of the substance within the interior region falls at least to said next partition.

23. An insect feeding station according to any one of claims 1 to 4 wherein the internal structure defines a plurality of discrete reservoirs.

24. An insect feeding station according to claim 23 wherein the discrete reservoirs are so arranged that the surplus substance can flow from one reservoir to another.

25. An insect feeding station according to any one of claims 1 to 4 wherein said at least part of the internal structure includes a plurality of lateral protrusions in a spaced apart relationship with at least some of the protrusions being positioned one above another.

26. An insect feeding station according to claim 25 wherein the lateral protrusions are arranged to define feeding chambers.

27. An insect feeding station according to claim 1 wherein the internal, structure comprises an internal wall dividing the interior region into first and second chambers, the internal wall having a face exposed to said second chamber, the first chamber being adapted to contain fluent substance in liquid form and the second chamber being accessible to insects, and at least one small hole in the internal wall extending between the two chambers, the or each hole being so dimensioned that insects within the second chamber are excluded from the first chamber and that in use liquid in the first chamber can ooze through the hole into the second chamber.

28. An insect feeding station according to claim 27 wherein the or each hole is so constructed that liquid oozing therethrough forms a liquid globule on the face of the internal wall whereby insects in the second chamber can move along said face to obtain access to the liquid globule formed thereon.

29. An insect feeding station according to claim 27 or 28 wherein there are a plurality of such holes.

30. An insect feeding station according to any one of claims 27 to 29 wherein a first upper chamber is provided above the first chamber and is in communication therewith via a first opening.

31. An insect feeding station according to claim 30 wherein a second upper chamber is provided above the second chamber and is in communication therewith via a second opening.

32. An insect feeding station according to any one of the preceding claims wherein the housing comprises a front walk and a rear wall in spaced apart relationship.

33. An insect feeding station according to claim 32 wherein the housing defines a plurality of interior regions which are positioned one in front of another and each of which has a respective one of the internal structures.

34. An insect feeding station according to claim 33 wherein the interior regions are positioned one in front a another, such regions may be disposed between the front and rear walls of the housing and separated one from another by internal walls.

35. An insect feeding station according to claim 34 wherein the or each partition of the partition structure extends between the respective walls defining the particular interior region.

36. An insect feeding station according to any one of claims 32 to 35 wherein the interior region has a top wall, an upper chamber being defined in the housing above the top wall.

37. An insect feeding station according to claim 36 wherein said means defining an opening by which insects can enter and leave the interior region comprises an aperture formed in the top wall.

38. An insect feeding station according to claim 36 or 37 wherein the upper chamber is adapted to contain a quantity of the substance and wherein the upper chamber has means through which the substance contained therein can pass into the interior region.

39. An insect feeding station according to claim 38 wherein said means through which the substance contained in the upper chamber can pass into the interior region comprises said aperture through which insects can pass,

40. An insect feeding station according to any one of the preceding claims wherein said at least part of the internal structure functions to strain the surface of the fluent substance as it progressively falls to remove bodies of insects from the fluent substance.

41. An insect feeding station on according to any one of claims 1 to 26 or to any one of claims 32 to 40 wherein there is provided a surface extending upwardly of said opening for receiving a substance attractive to insects for the purpose of luring insects through the opening and into the interior region.

42. An insect feeding station according to claim 41 wherein the housing comprises a front wall and a rear wall in spaced apart relationship, portion of the rear wall extending upwardly beyond the front wall to define said surface.

43. An insect feeding station according to claim 41 or 42 wherein in use a trail of said substance attractive to insects is laid over said surface to terminate at or near said fluent substance contained within the interior region.

44. An insect feeding station according to any one of claims 1 to 26 or to any one of claims 32 to 43 wherein said opening is in opposed relation to said bottom with respect to the interior region.

45. An insect feeding station according to claim 44 wherein said opening provides a means for introducing the fluent substance into the interior region of the housing whereby in use insects are able to follow the path along which the substance flowed into the interior region.

46. An insect feeding station according to any one of claims 1 to 26 or to any one of claims 32 to 45 wherein the opening provides an inlet opening through which the fluent substance is introduced into the interior region, the opening being so positioned in relation to the internal structure that the fluent substance so introduced can pour onto said at least part of the internal structure.

47. An insect feeding station according to any one of claims 1 to 4 wherein the internal structure comprises a plurality of internal walls defining reservoirs therebetween each adapted to receive and contain a portion of the fluent substance, the reservoirs being so dimensioned that fluent substance contained therein is shallow in relation to the exposed surface area thereof.

48. An insect feeding station according to any one of the preceding claims wherein the internal structure comprises a plurality of discrete reservoirs each adapted to receive and contain a portion of the substance, each reservoir being so dimensioned that in use the bottom of the reservoir is exposed before bodies of insects can accumulate to an extent to create a barrier preventing insects from obtaining access to the remaining substance in the reservoir.

49. An insect feeding station according to claim 48 wherein.
said reservoirs are elongated.

50. An insect feeding station according to claim 48 wherein at least some of the reservoirs are located one above another whereby the substance introduced into the interior region can overflow from one reservoir to another reservoir located therebelow.

51. An insect feeding station according to claim 49 wherein the reservoirs are each so dimensioned that the portion of the substance contained therein is shallow in relation to the exposed surface area thereof.

52. An insect feeding station according to any one of the preceding claims wherein the internal structure is of a configuration which ensures that insects always have access to the substance containing within the interior region.

53. An insect feeding station according to claim 52 wherein the internal structure is of such a construction that in use the interior region does not became clogged with bodies of dead insects so ensuring that the remaining fluent substance is always accessible to other insects.

54. An insect feeding station according to any one of the preceding claims wherein said side wall means includes two spaced apart external walls in opposing relationship, the spacing between the two external walls being small in relation to the depth of the interior region.

55. An insect feeding station according to any one of the preceding claims wherein said inhibiting means are disposed at various levels.

56. An insect feeding station according to any one of the preceding claims wherein said substance is toxic.

57. An insect feeding station according to any one of the preceding claims wherein the fluent substance is in liquid form.

58. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects and wherein said inhibiting means comprises a plurality of supporting surfaces disposed at various levels.

59. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area Within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, wherein said inhibiting means strains the surface of the substance at various levels as it progressively falls for removing bodies of insects therefrom to at least inhibit clogging of the substance by said bodies.

60. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, the internal structure being of a construction which is adapted to be at least partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the substance is consumed, at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, wherein the interior region has a wall and wherein said inhibiting means comprises a plurality of discrete protrusions extending laterally of said wall, at least some of the protrusions being positioned one above another.

61. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of the internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, said at least part of the internal structure comprising a plurality of internal walls defining discrete reservoirs in spaced apart relationship, each reservoir being adapted to receive and contain a portion of the substance with a surface thereof exposed.

62. An insect feeding station for administering a liquid substance to insects, comprising a housing having a wall and an interior region adapted to contain the liquid substance, a boundary of the interior region being defined by the wall, the wall having an inner side which confronts the interior region and an exterior side on the opposed side thereof, an internal structure within the interior region for facilitating access by the insects to the substance, said at least part of the internal structure comprising means for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed by the insects, the wall being provided with at least one hole so dimensioned that insects are excluded from entering the interior region through the hole and than in use the liquid substance in the interior region can ooze through the hole to form a globule of liquid on the exterior side thereof which remains at the hole for consumption, wherein insects can obtain access to the wall for consuming the globule of liquid formed at the hale.

63. An insect feeding station according to claim 62 wherein there are a plurality of such holes in the wall.

64. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, the interior region having a bottom wall, means for defining an opening in the housing through which insects can enter the interior region, and an internal structure within the interior region for facilitating access by insects to the substance, and an area within the interior region where in use the substance is contained entirely by side wall means and said bottom wall, said bottom wall having a perimeter which is entirely surrounded by said side wall means, said bottom wall and said side wall means being devoid of any opening therein where the substance is contained, at least part of said internal structure being located within said area and within the confines of said side wall means, said at least part of the internal structure being adapted the be at least partially covered by the substance when the substance is first introduced into the interior region and progressively exposed as the level of the substance at which insects feed progressively falls upon consumption of the substance, wherein said at least part of the internal structure provides a means for straining the surface of the substance at various levels as it progressively falls for removing bodies of insects therefrom to at least inhibit clogging of the substance by said bodies and wherein said at least part of the internal structure being of an open construction having interstices at various levels through which insects can move while being supported on said at least part of the internal structure to obtain access to the substance.

65. An insect feeding station for administering a fluent substance to insects, comprising a housing having an interior region adapted to contain the substance, means for defining an opening in the housing through which insects can enter and leave the interior region, and an internal structure within the interior region for facilitating access by the insects to the substance, the internal. structure being of a construction which is adapted to at least be partially covered by the substance when the substance is first introduced into the interior region and which is progressively exposed as the substance is consumed, wherein the interior region has a wall and wherein the internal structure includes a plurality of discrete protrusions extending substantially laterally of said wall for inhibiting the accumulation of bodies of insects in the substance as the substance is consumed, at least some of the protrusions being positioned one above another, wherein at least part of the internal structure being of an open construction having interstices at various levels through which insects can move while being supported on said at least part of the internal structure to obtain access to the substance.

56. An insect feeding station according to claim 60 or 65 wherein said protrusions comprise slender rods.

67. An insect feeding section according to claim 58 or 59 wherein said at least part of the internal structure being of an open construction having interstices at various levels through which insects can move while being supported on said at least part of the internal structure to obtain access to the substance.