MXPA98006931A - System of protection against termitas subterran - Google Patents

Abstract

A system of protection against subterranean termites that includes a hollow tube in which the termites can circulate, a container to contain bait and a branch that connects the hollow tube to the container

Description

DB SYSTEMS PROTECTION AGAINST UNDERGROUND TERMITES FIELD OF THE INVENTION The invention relates to a technical system and method for controlling subterranean termites, and for the reduction or elimination of a population of subterranean termites. The term "termite" will refer to "subterranean termite" below in this document. Many methods of termite removal have already been proposed, in whole or in part. Many insecticide compounds have also already been proposed for the same purpose. However, termites continue to be a problem that is still difficult to control.

BACKGROUND OF THE INVENTION It is an object of the invention to provide a simple, improved and efficient way or method for controlling termite populations. Another object of the present invention is to provide effective protection of buildings or dwellings or establishments against termites. REF: 28219 Another object of the invention is to provide a simple and economical method for controlling termites. Another object of the present invention is to provide a new and powerful means to reduce the population of termites around a building. It has been found that these objects can be achieved in whole or in part by means of the present invention.

DESCRIPTION OF THE INVENTION Therefore, the invention relates to a new method for the protection of buildings against termites. It comprises a set of partial control systems, each partial control system being capable of controlling the termites in a limited area close to said building, the locations of each partial control system being such that the combinations of all the limited areas provide a control overall around the entire building, each partial control system (preferably an underground system) comprising a hollow tube in which the termites can circulate (and are preferably attracted to circulate) and a branch connecting said tube to a container containing a bait, and optionally a poison for said termites, or an insecticide with delayed action for said termites. According to a more preferred feature of the invention, the tubes of the partial control systems are formed together as a continuous tube surrounding the building. In the invention, said tubes, either partially or combined in one, generally have a sufficiently wide diameter to allow many termites to circulate easily inside and said tubes are also punctured by holes that are large enough to allow termites to enter. said tube (s), said holes being distributed along the length of the tube, preferably in a regular manner. One common way of distributing the holes along the tubes is to have intervals between holes in a gap of 2 cm to 25 cm, preferably from 6 cm to 20 cm. According to another characteristic of the invention, the tube (s) are made attractive to the termites by providing within said tubes a material that attracts them, such as corrugated cardboard, chips, wood chips or sawdust. The invention also relates to a new system for the protection of buildings against termites comprising a hollow and continuous tube to surround the building, said tube having a sufficiently wide diameter to allow many termites to circulate easily in the interior and said tube being also perforated by holes that are large enough to allow the termites to enter the tube, said holes being distributed along the length of the tube, preferably in a regular manner. In the following, various possible embodiments of the invention are described, which are either possible or preferred. According to a first embodiment, the tube (s) is (are) buried in the ground at a sufficient depth so that it can not be seen from outside. It is (are) buried (s) preferably less than 30 cm deep, preferably in the range of 20 to 200 mm.

According to a preferred embodiment of the invention, the tube is made of a material such as plastic. Its inner diameter is generally greater than 2 mm, preferably in the range of 3 to 25 mm outside diameter. According to another preferred embodiment of the invention, the container containing a bait is a box containing (preferably is filled with) at least moisture or water, and preferably a material that attracts termites, such as wood, or particles of wood, or shavings or cardboard or corrugated cardboard. The bait may include other attractants such pheromones.

The distance between the pipe and the building to be protected is not critical as long as the pipe forms a continuously effective barrier around the building.

A distance that is in the range of 0.5 m to 10 m is generally adequate. The invention will be more clearly understood from the following description, given only by way of example, with reference to the accompanying drawings, in which: Figure 1 illustrates a plurality of control systems according to the present invention arranged around a building. Figure 2 illustrates a control system according to the present invention with a hollow tube surrounding a building; and Figure 3 illustrates four control systems according to the present invention having their tubes joined together to surround a building. A control system includes a hollow tube 1 connected to a container 4 through a branch 3. As illustrated in Figure 1, a plurality of such control systems can be arranged around the periphery of a building 2. Each tube hollow 1-aa 1-n is arranged to allow termites to circulate therein. In particular, holes, not illustrated, can be provided along the length of the tube to allow termites to enter it. The whole system can be buried under the ground. However, for convenience, preferably each hollow tube 1-a to 1-n is buried and each branch 3-a to 3-n is connected to a vessel or bait box 4-a to 4-n respectively on the ground.

By providing a plurality of control systems around the periphery of the building, each of them protecting a local area, the entire periphery of the building 2 can be protected. In the embodiment of Figure 2, only one system is used. control to provide a system for complete protection of a. Building 2. In particular, it is provided that the hollow tube 1 extends around the entire periphery of the building 2. In the embodiment of Figure 3, four control systems provided with hollow tubes are provided which are joined together to extending around the periphery of the building 2. Therefore, an individual hollow tube 1 is connected by means of four branches 3-1 to 3-4 to four containers 4-1 to 4-4. According to another preferred embodiment of the invention, the container containing a bait also includes an insecticide, which is preferably an insecticide having secondary lethal properties and a delayed action. By secondary lethal properties it is understood that the insecticide is not only capable of killing insects that come into direct contact with it, but also of killing insects that enter into social relationships with insects that have come into contact with the insecticide. The amount of insecticide in said bait container should be large enough to be able to kill all the insect amount of the nest or refuge in which said insects are generally sheltered. The amount depends additionally on the size of the nest or shelter of the termites and the specific nature of the insecticide. An insecticide that has a delayed action is an insecticide that has no devastating effect, that is, an insecticide that kills insects within a period of time greater than 3 minutes after they have taken a lethal dose, preferably greater than 30 minutes. The bait vessel may be below the surface of the ground (immersion in the ground) or it may be placed on or above the ground. The derivation then comes from the T-piece of the underground tube to the ground level to establish the connection with the container. Many insecticides with delayed action can be used in the invention. All insect growth regulators can be used. These compounds generally act on the molt. Compounds that have insect growth regulating action include compounds that kill insects through moult disturbance, especially benzoylureas derivatives and all known insecticides that have a benzoylurea group in their formula.

Another family of insecticides which is particularly suitable for the invention are the 1-substituted phenyl pyrazoles which also have other appropriate substituents in this pyrazole ring. The 1-arylpyrazoles that can be used according to the present invention are preferably compounds of the formula (I): (I) wherein: Ri is CN or methyl or a halogen atom.

R 2 is S (0) nR 3 or 4,5-dicyanoimidazol 2-yl or haloalkyl, R 3 is an alkyl or haloalkyl; R4 represents a hydrogen or halogen atom or a member of a group consisting of NR5R6, S (0) mR7, C (0) R7, C (0) 0-R7, alkyl, haloalkyl, OR8 and -N = C (R9) (Rio); R5 and R6 independently represent the hydrogen atom or an alkyl, haloalkyl, C (0) alkyl, -C (0) OR7 or S (0) rCF3 radical; or R5 and R6 may together form a divalent alkylene radical which may be interrupted by one or more heteroatoms, such as oxygen, nitrogen or sulfur; R7 represents an alkyl or haloalkyl radical; R8 represents an alkyl or haloalkyl radical or a hydrogen atom; Rg represents an alkyl radical or a hydrogen atom; Rio represents a phenyl or heteroaryl group which may optionally be unsubstituted or substituted by one or more halogen, OH, -O-alkyl, -S-alkyl, cyano or alkyl or combinations thereof; R n and R 2 represent, independently of one another, a hydrogen or halogen atom, or CN or N 0 2, R 13 represents a halogen atom or a haloalkyl group, haloalkoxy, S (0) q CF 3 or SF 5, X represents an atom of trivalent nitrogen or a radical CR? 2, in which three other valences of the carbon atom form part of the aromatic ring, m, n, q and r represent, independently of each other, an integer equal to 0.1 or 2. With the condition that when Ri is methyl, then either R3 is a haloalkyl, R4 is NH2, Ru is Cl, R13 is CF3, and X is N, or then R2 is 4,5-dicyanoimidazol-2-yl, R is Cl , R is Cl, Ri3 is CF3, and X is = C-C1. The alkyl and alkoxy groups and their fractions of the formula (I) are preferably lower alkyl and alkoxy groups, ie, groups having from one to six carbon atoms. The haloalkyl and haloalkoxy groups also preferably have from one to four carbon atoms. The haloalkyl and haloalkoxy groups can carry one or more halogen atoms, preferred groups of this type include -CF3 and -OCF3. It should be understood that the ring formed by the divalent alkylene radical represented by R5 and R6 and including the nitrogen atom to which R5 and R6 are attached is generally a ring of 5, 6 or 7 members. When Rio is a heteroaryl, it is preferably pyridyl, more preferably 2-pyridyl. It will be understood that the 1-arylpyrazoles of formula (I) include enantiomers and / or diastereomers thereof. A preferred group of 1-arylpyrazoles for use in the present invention are those of the formula (I) with one or more of the following characteristics, in which Ri is CN; R4 is -NRRe; Rs and R6 are independently selected from the hydrogen atom, alkyl, haloalkyl, C (0) alkyl, C (0) 0R7; X is C-Ri2; or R3 is selected from a halogen atom, haloalkyl, haloalkoxy, and -SF5. Another preferred group of 1-arylpyrazoles of formula (I) for use in the present invention is one in which: Ri is CN; R3 is a haloalkyl radical; R4 is NH2; X is C-R? 2; R n and R 2 represent, independently of one another, a halogen atom; and Ri3 is a haloalkyl radical.

A more preferred compound is 5-amino-1- (2,6-dichloro-4-trifluoromethylphenyl) -4-trifluoromethylsulfinyl-3-cyanopyrazole, designated below as compound (A). The compounds of formula (I) can be prepared according to known processes, for example as described in International Patent Applications WO 87/3781, 93/6089, and 94/21606 as well as in European Patent Applications 295117, 403330, 385809 or 679650, in the German Patent Publication 19511269 and in the Patents of the United States 5232940 and 5236938 or other processes according to the knowledge of a person skilled in the art of chemical synthesis, which are considered to be included in Chemical Abstracts and in the bibliography mentioned therein. It is also possible to prepare compositions comprising the compounds of formula (I) according to the teachings of the same prior art or similar publications. The protection system according to the invention is advantageous due to its effectiveness. One aspect of this effectiveness is the ability to control numerous types of insects, especially subterranean termites, with a given amount of bait.

The following example illustrates the use thereof in practice, but in no way means that this example is considered as a limitation of the invention to the particular embodiments described.

EXAMPLE A plastic tube of 25 mm in diameter was laid to completely enclose a house, whose size was 15 mm x 20 m. every 100 mm, the tube had regular holes of 3 mm in diameter. The tube was placed five meters away from the house and 100 mm deep in the ground. It was connected by means of a shunt to a box of 200 mm x 400 mm x 400 mm in size. The derivation of the emergy tube from below and the box rested on the surface of the earth. The box contained 10 blocks of wood of 6 cm3 each, and humidity created by means of 5 cm3 of water poured on the wood. In the same box 0.1 g of fipronil was dispersed as a liquid formulation on said blocks. 2 months after installing the tube around the box, the box contained approximately 1200 dead termites.

Claims (18)

1. - A control system for controlling termites comprising: a hollow tube (1) in which termites can circulate; a container (4) for containing bait; and a branch (3) connecting the hollow tube (1) to the container (4).

2. - A system according to claim 1, characterized in that at least the hollow tube (1) is underground.

3. - A system according to claim 1 or 2, characterized in that the hollow tube (1) is arranged to induce the termites to circulate.

4. - A system according to claim 1, 2 or 3, characterized in that the container (4) contains an insecticide with a delayed action for said thermite.

5. - A system according to any of the preceding claims, characterized in that the hollow tube (1) has a sufficiently wide diameter to allow many termites to circulate easily inside.

6. - A system according to any of the preceding claims, characterized in that the hollow tube (1) is pierced by holes that are large enough to allow the termites to enter said tube (s).

7. - A system according to any one of the preceding claims, characterized in that the hollow tube (1) is perforated by holes that are distributed along the tube (1), preferably regularly.

8. - A system according to any one of the preceding claims, characterized in that the hollow tube (1) is made attractive for the ends by providing an attractive material inside said tube.

9. - A system for the protection of buildings (2) against termites comprising a set of at least one control system according to any one of the preceding claims, each control system being capable of controlling the termites in a limited area close to said building (2), the locations of each partial control system being such that the combinations of all the limited areas provide overall control around said entire building (2).

10. - A system according to claim 9, characterized in that the tube (1) or several tubes (1) of each control system together form a continuous tube (1) surrounding the building (2).

11. - A system for the protection of buildings against termites comprising a hollow and continuous tube (1) surrounding said building (2), said tube (1) having a sufficiently wide diameter to allow many termites to circulate easily in the interior and being said tube (1) also perforated by holes that are sufficiently large to allow the termites to enter the tube (1), said holes being distributed along the length of the tube (1), preferably in a regular manner.

12. - A system according to any of the preceding claims, characterized in that the tube (s) is (are) buried in the ground at a sufficient depth so that it can not be seen from outside.

13. - A system according to any of the preceding claims, characterized in that the tube (1) is buried less than 30 cm deep, preferably in the range of 2 to 20 cm.

14. - A system according to any of the preceding claims, characterized in that the container (4) containing a bait is a box containing moisture or water, and preferably a material that attracts termites, such as wood, or wood particles, or chips or cardboard or corrugated cardboard.

15. - A system according to any of the preceding claims, characterized in that the container (4) containing a bait also includes an insecticide, which has secondary lethal properties.

16. - A system according to any of the preceding claims, characterized in that the container (4) contains an insecticide that is a compound of formula (I): "to (I) wherein: Ri is CN or methyl or a halogen atom, R2 is S (0) nR3 or 4,5-dicyanoimidazole 2-yl or haloalkyl, R3 is an alkyl or haloalkyl; R4 represents a hydrogen or halogen atom or a member of a group consisting of NR5R6, S (0) mR7, C (0) R7, C (0) 0-R, alkyl, haloalkyl, ORg and -N = C (R9) (Ri0); R5 and R6 independently represent the hydrogen atom or an alkyl, haloalkyl, C (O) alkyl, -C (0) OR7 or S (0) rCF3 radical; or R5 and R6 may together form a divalent alkylene radical which may be interrupted by one or more heteroatoms, such as oxygen, nitrogen or sulfur; R7 represents an alkyl or haloalkyl radical; R8 represents an alkyl or haloalkyl radical or a hydrogen atom; R9 represents an alkyl radical or a hydrogen atom; Rio represents a phenyl or heteroaryl group which may optionally be unsubstituted or substituted by one or more halogen, OH, -O-alkyl, -S-alkyl, cyano or alkyl or combinations thereof; Rn and R12 represent, independently of one another, a hydrogen or halogen atom, or CN or N02, R13 represents a halogen atom or a haloalkyl, haloalkoxy, S (0) qCF3 or SF5, X represents a nitrogen atom trivalent or a radical CR? 2, in which three other valences of the carbon atom form part of the aromatic ring, m, n, q and r represent, independently of each other, an integer equal to 0.1 or 2. With the proviso that when Ri is methyl, then either R3 is a haloalkyl, R4 is NH2, Rn is Cl, R13 is CF3, and X is N, or then R2 is 4,5-dicyanoimidazol-2-yl, R4 is Cl, Ru Let Cl, Ri3 be CF3, and X be = C-C1.

17. - A protective system according to claim 13, characterized in that: Ri is CN; R3 is a haloalkyl radical; R4 is NH2; X is C-R12; R11 and R12 represent, independently of one another, a halogen atom; and Ri3 is a haloalkyl radical.

18. - A system according to any of claims 1 to 15, characterized in that the container (4) contains an insecticide that is an insect growth regulator, preferably comprising a benzoya group.