EP4072282A1 - Distributeur de vapeur d'acide formique et procédé de lutte contre les acariens dans des ruches - Google Patents

Distributeur de vapeur d'acide formique et procédé de lutte contre les acariens dans des ruches

Info

Publication number
EP4072282A1
EP4072282A1 EP19831991.5A EP19831991A EP4072282A1 EP 4072282 A1 EP4072282 A1 EP 4072282A1 EP 19831991 A EP19831991 A EP 19831991A EP 4072282 A1 EP4072282 A1 EP 4072282A1
Authority
EP
European Patent Office
Prior art keywords
evaporation
formic acid
container
evaporation container
dispenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19831991.5A
Other languages
German (de)
English (en)
Inventor
Rudolf Johannes EHWALD
Helge Adleff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Famlee Fund GmbH
Original Assignee
Famlee Fund GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Famlee Fund GmbH filed Critical Famlee Fund GmbH
Publication of EP4072282A1 publication Critical patent/EP4072282A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K51/00—Appliances for treating beehives or parts thereof, e.g. for cleaning or disinfecting
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/20—Poisoning, narcotising, or burning insects
    • A01M1/2022—Poisoning or narcotising insects by vaporising an insecticide
    • A01M1/2027—Poisoning or narcotising insects by vaporising an insecticide without heating
    • A01M1/2044—Holders or dispensers for liquid insecticide, e.g. using wicks

Definitions

  • the so-called short-term treatment with formic acid vapor in which, for example, a sponge cloth soaked with formic acid is inserted into a cavity above or below the honeycomb of the beehive, can be called shock therapy because initially high formic acid vapor concentrations occur in the hive for a short time (Liebig 2011).
  • shock therapy because initially high formic acid vapor concentrations occur in the hive for a short time (Liebig 2011).
  • a better regulated steam release is achieved with the help of the Krämer plate, in which the formic acid is bound to a soft fiber board and the evaporation area can be adapted to requirements by means of the number and size of evaporation windows in an enveloping plastic film. Since the degree of swelling of the fiberboard influences the vapor pressure and the permeability of the formic acid, the evaporation rate also decreases significantly with this dispenser over time.
  • a strong initial concentration of formic acid vapor is also achieved with the Mite Away Quick Strips (MAQS), according to patent application US 2008 / 0280528A1, which are placed in a cavity under the lid of the beehive.
  • the MAQS dispenser binds the formic acid to a gel cushion with a wick-like evaporation surface, which is limited by an evaporation window in an envelope. It combines a short-term shock effect with a longer-lasting and gradually decreasing release of formic acid vapor and, in addition to the advantage of being relatively effective against mites, has application advantages (Aumeier et al. 2011).
  • the Nassenheider dispenser (EP 0959 674 B1), the use of formic acid with a medicine bottle and the Liebig dispenser have been developed for long-term treatment (Liebig 2011).
  • long-term treatment the formic acid preparation is transferred from a storage container to a wick and evaporation takes place on a capillary suction evaporation surface, e.g. a sponge cloth or filter paper, the evaporation surface gradually increasing to a certain value.
  • a capillary suction evaporation surface e.g. a sponge cloth or filter paper
  • the formic acid vapor concentration in the prey increases gradually, and the administered The dose is spread over a longer period of time. This is a better way to prevent the bees, especially the queens, from being exposed to a toxic dose.
  • Ruzicka describes a dispenser in the form of a plate with a core consisting of open-pored formic acid-resistant organic foam, for example made of phenolic resin foam.
  • the core which is still dry, is initially wrapped in a liquid-impermeable film.
  • the wrapped plate is cut into two halves and the core of the halves is capillary saturated with the liquid formic acid preparation.
  • the cut surface acts as an evaporation window.
  • One advantage of this dispenser is its ease of use and the high volume-related capacity of the core for the formic acid preparation.
  • Most of the formic acid dispensers used to date use the space of an empty frame as the steam distribution space. With the Nassenheider dispenser in the vertical application form and with the dispenser according to Burmeister (Charriere J-D, 1998), the distribution space is an empty honeycomb frame on the edge of the brood nest.
  • the dispenser according to US Pat. No. 6,837,770 B2 is fastened in a vertical position in a space between the loot wall and the outer frame, the evaporation surface being at the bottom.
  • the evaporation surface is adjacent to a distribution space for the formic acid vapor, the air of which is far below the brood nest temperature in cool weather and has a high relative humidity.
  • the formic acid steam treatment of the colonies is usually carried out in late summer directly after the honey harvest and a second time after feeding. At the times mentioned (in Central Europe from the end of July to the beginning of September) the infestation with the parasitic mite is particularly strong.
  • Amrine J and Noel R (2006) describe a formic acid dispenser in which the evaporation surface borders on an air space above the honeycomb and faces the honeycomb, so that the evaporation surface is flowed through by the air heated in the brood nest.
  • This dispenser has a wooden frame to be placed on the frame with the honeycomb frame as well as a wooden inner frame to be used in this frame, which is covered with an aluminum sheet or a plastic plate at the top, except for a narrow bee path.
  • An absorbent fabric for capillary binding of the formic acid preparation is attached under the cover with the aid of a grid.
  • Evaporation speed in cold weather is achieved when using the medicine bottle in conjunction with a soft fiber board (Liebig 2011). Since the plate placed on the honeycomb frame of the brood nest is in direct contact with the brood nest, it releases the formic acid vapor directly into the honeycomb lanes covered by it on its underside, which is heated by the brood nest. With this method, too, at low outside temperatures, a strong temperature gradient from the underside of the panel to the top and a strong dependence on the weather are unavoidable. If it is used in a warmer outdoor climate, there is a risk of overdose with high toxicity for the bees and the loss of the queen. With all known formic acid dispensers, the area-related evaporation rate is highly dependent on the outside climate.
  • Previously known formic acid dispensers for combating mites in beehives expose the evaporation surfaces moistened with the liquid formic acid preparation or the evaporation window formed in a gas-tight envelope for the release of steam in a wide air space outside the brood nest, which results in the dependence of the steam release rate on the outside climate.
  • the usual expansion of the volume of the prey or the use of an empty frame for treatment with formic acid vapor is probably related to the obvious idea that this is the only way to achieve an effective convective distribution of the vapor in the pouch air.
  • the previously mentioned dispersers are hazardous to health if used negligently, because either the open acid or surfaces of the dispenser that are moistened with the formic acid preparation have to be handled.
  • Patent application DE 10 2011000223 A1 also describes the use of a membrane that is permeable to gases such as formic acid vapor and water vapor and impermeable to liquid water and formic acid for protection against liquid formic acid. This membrane is covered with a vapor-tight film before the dispenser is used.
  • the problem of possible skin contact with formic acid has not yet been solved in that the gas-permeable and liquid-impermeable membrane is covered by a gas-impermeable layer.
  • the outside of the gas-permeable liquid barrier can be moistened with the formic acid preparation due to condensation.
  • the object of the invention is to provide a user-friendly dispenser for formic acid vapor in beehives, which allows an evaporation rate largely independent of the outside climate without additional heating while avoiding the disadvantages mentioned above.
  • Another object is to provide a convenient, inexpensive, and risk-free method of formic acid treatment of beehives.
  • the object is achieved according to the invention by a dispenser for formic acid vapor according to one of claims 1 to 5 in conjunction with a method for treating a beehive for mite control according to one of claims 6 to 12.
  • FIG. 1 contains two interconnected compartments for introducing a liquid formic acid preparation, one of which is limited to the outside in whole or in part by the evaporation surface and is referred to below as evaporation container 1, and another compartment which is gas-tight to the outside and is hereinafter referred to as a storage container 2 is designated.
  • the dimensions of the evaporation container make it possible to place it in an air space directly adjacent to the brood nest combs and honeycomb lanes 3 of the brood nest or located in a honeycomb lane without expanding the volume of the prey and without using an empty frame, while the evaporation surface 4 is in the air space of a honeycomb lane or in an air flow path integrated into the evaporation container through the brood nest.
  • the evaporation area is limited by a layer that is impermeable to the liquid formic acid preparation but highly permeable to its vapor and other gases, which is referred to as a gas-permeable liquid barrier.
  • a gas-permeable liquid barrier in the form of a highly porous flat membrane or tubular membrane made of a hydrophobic material, for example a polyolefin, is suitable for delimiting the evaporation surface.
  • Gas-permeable liquid barriers with the properties mentioned find numerous applications, for example for the production of waterproof gas-permeable clothing, passive valves, porous spacers and devices for gas exchange with liquids such as artificial lungs and the like. They are available, for example, as industrial mass products made of polypropylene with the brand names Accurel ® , Celgard ® , Oxyphan ® and Treo-Pore ® .
  • the gas-permeable liquid barrier for the use according to the invention like the aforementioned porous polypropylene membranes, consists of a hydrophobic material. It has continuous gas-filled pores with a width between 10 nm and 1000 nm; the pore volume exceeds 30 percent by volume.
  • the membrane thickness is below 300 ⁇ m.
  • the features mentioned ensure that the evaporation rate is not hindered by the gas-permeable liquid barrier.
  • Membranes with the properties mentioned can withstand a back pressure of water and formic acid of up to several bar. This can reliably prevent the formic acid preparation from leaking out of the evaporation container if the storage container is positioned above the evaporation container and the liquid formic acid preparation flows from the storage container into the evaporation container to replace the amount of evaporation.
  • a gas-permeable liquid barrier with the properties mentioned cannot limit the rate of evaporation because its vapor permeability by far exceeds that of the laminar flowing outer layers of air. Because of the dynamic pressure resistance of these membranes, the constant supply of the formic acid preparation to the evaporation surface is simplified; a wick becomes superfluous. The evaporation is due to the extremely high gas permeability of the gas-permeable liquid barrier used in contrast to that of Daniels et al. (1999) described method with a latex membrane not membrane-controlled; This enables extremely high area-related evaporation rates at the temperature of the brood nest, as will be shown below.
  • a storage container connected to the narrow evaporation container is used to receive the treatment dose. It can be placed in the prey outside the brood nest or even outside the prey; it does not have to be in a close thermally conductive relationship to the brood combs.
  • the division of the liquid treatment dose into two compartments, a large-lumen storage container and a small evaporation container, enables the evaporation surface to be introduced into relatively narrow air spaces in which the air is directed through the brood nest or over the brood nest.
  • the evaporation container While the dispenser is in use, the evaporation container is in direct contact with the honeycomb or it is located in a honeycomb alley or it lies on the upper girders of the honeycomb frames. In all cases, the evaporation container is in a close, heat-conducting connection with the brood nest so that its temperature is determined to a greater extent by the brood nest temperature than the outside temperature.
  • the method according to the invention dispenses with a wide air space for distributing the formic acid vapor in the prey, the temperature of which is significantly below the temperature of the brood nest combs. This eliminates the condensation of water on the evaporation surface.
  • the method according to the invention for treating a bee hive for mite control comprises the placing of an evaporation container in the hive in connection with the exposure of its evaporation surface in a honeycomb lane with a normal width of up to 12 mm, a space between the brood nest frame and the hive roof or a further frame or in one Air flow path integrated in the evaporation container, which leads through the brood nest. Placing the evaporation container in an air space adjacent to the brood nest enables the formic acid vapor to be released into the air that is thermally or mechanically moved by the bee activity and is characterized by a high water vapor saturation deficit. Effective heat conduction from the brood nest combs, whose temperature is approx.
  • the relative humidity which is regulated by the bees to a value of around 40%, is below that relative humidity of a 60% solution of formic acid in water, so that the superficial condensation-related dilution of the formic acid is avoided.
  • This enables an evaporation rate that is relatively independent of the outside climate. This rate is essentially determined by the air flow near the evaporation surface and its geometry.
  • the evaporation container can be suspended from above in a honeycomb lane of the brood nest and connected to a storage container by a closable liquid conductor, the latter being placed on the upper girders of the honeycomb frames as the flatly extended container according to FIG. If the level of consumption is to be made visible, the storage container can also be placed outside the hive, with the connecting line, for example, being led through the hive wall or an entrance hole.
  • the evaporation container can be placed on the honeycomb frame above the brood nest, the membrane-limited evaporation surface being placed on the air space of several honeycomb lanes, as is shown schematically in FIG. This distributes the steam from above into several honeycomb lanes simultaneously.
  • covering the evaporation container with a heat-insulating layer is advantageous for temperature constancy on the evaporation surface when the outside climate is cool.
  • the outer shell of the dispenser consists of a closed foil bag made of polyethylene, polypropylene or another hydrophobic, flexible and weldable polymer, the evaporation container being separated from the storage container with the aid of a sealing external clamping device.
  • the evaporation container contains an internal skeleton, for example in the form of a grid plate, to ensure that the liquid formic acid preparation continues to flow onto the gas-permeable membrane.
  • the evaporation container can be placed in the honeycomb lane according to FIG. 3, above, or in another space between two honeycomb frames. It borders the honeycombs on both sides of the honeycomb alley, as was shown in the middle in FIG. 3. In the latter case, the evaporation container is fixed in its position, for example when the still empty honeycomb frames are suspended, and the treatment dose is introduced into the evaporation container after the brood combs have been built. The evaporation container is placed in such a way that it is surrounded by brood nest combs during treatment and its evaporation surface is adjacent to the integrated air flow channel.
  • the evaporation tank can be designed so that the air flow channel from a flexible inner wall in which the gas-permeable liquid barrier is integrated, an elastic screen mesh 9 and a flexible liquid-tight outer wall is surrounded, as shown in FIG. 3, bottom.
  • the evaporation container can easily be inserted into the honeycomb lane, where it is elastically fixed.
  • the integration of the air flow path in the evaporation container makes it possible to conduct the gas laden with the formic acid vapor thermally upwards and to distribute it in the bag air over the honeycombs without the risk of a local formic acid vapor concentration that is toxic to bees.
  • the connecting line between the storage container and the evaporation container can be closed, the treatment dose of the formic acid preparation can first be enclosed in the vapor-tight storage container.
  • An advantageous possibility for this is shown schematically in FIG.
  • the already filled, stackable dispenser is suitable for storage and distribution before the connection line is opened.
  • the connecting line opens by pulling it out of the clamp 6 and the liquid formic acid preparation can be transferred to the evaporation container.
  • the formic acid vapor release rate of about 10 g per day recommended for high mite mortality is already achieved with an evaporation area of 10 cm 2 when prototypes of the dispenser according to the invention at a temperature of 35 ° C in slowly moving dry air can be used with a formic acid concentration of 60%.
  • the area-dependent evaporation rate reached similarly high values and was well above the area-dependent evaporation rate of previously known dispensers when the prototype of the evaporation container shown schematically in FIG. 1 was introduced into the honeycomb lane of a beehive during late summer. This shows that a further vapor distribution space outside the honeycomb space is not required to avoid vapor saturation on the evaporation surface. The explanation for this could be an unexpectedly high flow velocity of the air through the brood nest.
  • the evaporation containers were hung in a heated, ventilated air space with a temperature of 35 ° C and a constant supply of fresh air. The hourly rate of evaporation of 60% formic acid in the pipettes was determined by reading off the volume of the liquid.
  • the evaporation rate based on the evaporation area was 52 to 62 mm 3 cm 2 Ir 1 .
  • a daily evaporation capacity of over 10 ml per day was already achieved with an evaporation area of less than 10 cm 2 .
  • the formic acid dispenser described was tested in late summer in several beehives consisting of two boxes, with a connecting hose being passed through the hive wall.
  • the evaporation rate based on the area was 21 to 25 mm 3 cm 2 Ir 1 . This achieved the recommended daily release rate of 6 to 10 cm 3 for effective treatment with an evaporation area of only 15 cm 2 .
  • a dispenser according to the invention of the type shown in FIG. 5 has an outer shell in the form of a closed film bag.
  • the outer flexible polymer shell of the dispenser suitable for placing on the honeycomb frame is formed from a 10 cm wide film tube consisting of polyethylene with a wall thickness of 200 ⁇ m.
  • One end of a 50 cm long hose segment is closed by thermal welding.
  • a 4 cm wide and 18 cm long evaporation window is cut out in the film bag formed in this way.
  • a gas-permeable 20 .mu.m thick polypropylene membrane is glued onto the window from the inside.
  • the membrane has a pore space of 50 to 60% with a pore size between 20 and 200 nm.
  • the foil bag is tightly clamped over the liquid mixture with a commercially available clamp closure for foil bags (Gimex Easy Fresh) at a distance of about 18 cm from the weld seam, the clamped part of the bag containing the formic acid mixture forms the storage container 2.
  • the bag closure Part of the bag is a 20 cm long and 9 cm wide inner skeleton in the form of an intermediate lattice made of LDPE.
  • the previously open end of the bag is closed by thermal welding, so that a 25 cm long closed evaporation container 1 is created.
  • the empty evaporation container on the The bag closure can be folded back down.
  • the dispenser is set up in a suitable transport container together with other dispensers and stored until it is used in the hive.
  • the dispenser is removed from the transport container, the bag closure is temporarily removed, the contents of the storage container are transferred to the evaporation container and the evaporation container is closed again with the bag closure.
  • the dispenser is positioned on the honeycomb frame of the prey in such a way that the membrane-limited evaporation window rests across the course of the honeycomb frame on the upper girders above the brood nest, with the evaporation area exposed in 5 honeycomb lanes totaling 22 to 24 cm 2 .
  • the work mentioned for inserting the dispenser is risk-free because the formic acid-water mixture cannot reach the surface of the dispenser.
  • Both the emptied storage container and the now filled evaporation container fit into the space between the hive roof and the honeycomb frame or into the space between the frames of a multi-frame hive.
  • the end of the empty evaporation container can be folded or inserted into the space between the outer wall and the frame.
  • the evaporation surface is exposed to the air rising in the honeycomb lanes in the brood nest area, whereby there is a thermally conductive contact with the honeycomb frame in the brood nest area. Accordingly, evaporation takes place at a high temperature above 30 ° C, which is kept relatively constant by the bees. If you want to reduce the influence of a cool and humid outside climate even more, the evaporation container is covered with a heat-insulating layer. Evaporation is promoted by the strong air current rising in the honeycomb alleys and the water vapor saturation deficit actively created by the bees, even when the outside air is at a low temperature and is saturated with water vapor.
  • FIG. 1 shows schematically a dispenser, the evaporation container 1 (below) of which is connected to a storage container 2 (above).
  • the evaporation container is located in the honeycomb lane 3, in which it exposes the evaporation surface 4 delimited by the gas-permeable liquid barrier.
  • the evaporation container is connected by a connecting line 5 to the storage container, a flat container with a capacity of approximately 120 cm 3 and a base area of approximately 200 cm 2 .
  • the entire treatment dose of the liquid formic acid preparation is in the gas-tight sealed storage container.
  • the liquid formic acid preparation is fed into the evaporation container by opening clamp 6.
  • FIG. 2 schematically shows an evaporation container which is placed on the honeycomb frame 11 and is covered by a heat-insulating layer 7.
  • FIG. 3 shows a schematic representation of a section through two honeycomb frames with evaporation containers with different positions of the evaporation surfaces, which are delimited by a gas-permeable liquid barrier.
  • the evaporation container was placed in the honeycomb alley to treat the beehive and exposes two evaporation surfaces in the honeycomb alley. Spacers 13 ensure a defined air flow path and good heat conduction and prevent the evaporation window from contacting the honeycomb.
  • Middle Before the honeycomb was built, the evaporation tank was placed in the space between the central walls 14 of two honeycomb frames.
  • the evaporation container has an integrated air flow path, a flexible outer wall impermeable to formic acid vapor and a flexible inner wall into which the evaporation surface is integrated. In the position of the evaporation surface, the inner wall is formed by a gas-permeable liquid barrier.
  • the evaporation container contains an elastic screen mesh 9 made of polystyrene to ensure the distance between the outer and inner walls and to ensure elasticity.
  • FIG. 4 shows a schematic representation of a longitudinal section through a dispenser according to the invention with a clamping device which opens when the evaporation container is removed from the packaging 10.
  • a clamping device which opens when the evaporation container is removed from the packaging 10.
  • the connecting line 5 between the storage container 2 and the evaporation container 1 is tightly clamped off with a clamp 6.
  • the liquid formic acid preparation is only located in the storage container and the part of the connecting line that is between the clamp and the storage container.
  • the clamp prevents the formic acid preparation from being transferred to the evaporation container.
  • the connection line was stretched and pulled out of the clamp.
  • the formic acid preparation can be transferred to the evaporation container through the connecting line that is thus opened. This process can be supported by mechanical pressure on the flexible wall of the storage container.
  • FIG. 5 shows a schematic representation of the view of a dispenser according to the invention, in which the outer shell of the evaporation container and the storage container are formed from a liquid-tight, sealed foil bag 15.
  • the dispenser is shown in the view of the underside with the gas-permeable membrane introduced into a window in the outer shell, which forms the evaporation surface.
  • the storage container 2 is separated from the evaporation container by the clamping device 16. Before the dispenser is placed, it is filled with the liquid formic acid preparation.
  • the evaporation container 1 there is an inner skeleton 17 in the form of a grid to ensure the wetting of the gas-permeable membrane in the evaporation container spread out flat until the liquid phase has almost completely evaporated.

Abstract

L'invention concerne un distributeur se rapportant à la distribution de vapeur d'acide formique dans des ruches pour lutter contre les acariens. Le distributeur présente une surface d'évaporation délimitée par une membrane mince, hautement poreuse et perméable aux gaz, constituée d'un matériau hydrophobe et comprenant un récipient d'évaporation (1) et un réservoir (2), lequel est fermé hermétiquement vers l'extérieur, pour la dose de traitement d'une préparation d'acide formique liquide. Les dimensions du récipient d'évaporation lui permettent d'être placé dans un espace d'air étroit de la ruche, par exemple un espace alvéolaire (3), et la surface d'évaporation (4) est exposée dans un espace alvéolaire du nid à couvain ou dans un trajet d'écoulement d'air, qui est intégré dans le récipient d'évaporation, pour permettre à l'air de circuler dans le le nid à couvain et/ou l'espace entre deux corps de ruche ou entre un corps de ruche et le toit de ruche. Dans un mode de réalisation avantageux, le distributeur est équipé d'un emballage empilable, et la dose de traitement de la préparation d'acide formique est située exclusivement dans le réservoir fermé hermétiquement. Le procédé selon l'invention comprend diverses possibilités de placement du récipient d'évaporation dans la ruche à proximité, en liaison thermoconductrice étroite avec le nid à couvain. Le distributeur selon l'invention présente une caractéristiques distinctive selon laquelle, en combinaison avec le procédé selon l'invention, il offre un taux d'évaporation très élevé par unité de surface qui dépend moins du climat extérieur, et peut être utilisé sans étendre spatialement la ruche.
EP19831991.5A 2019-12-09 2019-12-09 Distributeur de vapeur d'acide formique et procédé de lutte contre les acariens dans des ruches Pending EP4072282A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/084252 WO2021115558A1 (fr) 2019-12-09 2019-12-09 Distributeur de vapeur d'acide formique et procédé de lutte contre les acariens dans des ruches

Publications (1)

Publication Number Publication Date
EP4072282A1 true EP4072282A1 (fr) 2022-10-19

Family

ID=69105764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19831991.5A Pending EP4072282A1 (fr) 2019-12-09 2019-12-09 Distributeur de vapeur d'acide formique et procédé de lutte contre les acariens dans des ruches

Country Status (3)

Country Link
US (1) US20230017070A1 (fr)
EP (1) EP4072282A1 (fr)
WO (1) WO2021115558A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0959674B1 (fr) 1996-03-06 2000-09-27 Weiland, Joachim Procede et dispositif pour l'evaporation de liquides, notamment de l'acide formique
CA2323263C (fr) 2000-10-13 2009-12-01 Vaclav Ruzicka Distributeur d'acide formique pour le controle des mites
US20080280528A1 (en) 2007-05-08 2008-11-13 Karen Ann Wassmer Varroa mites control entrance (VMCE)
DE102011000223A1 (de) 2011-01-19 2012-07-19 Acuros GmbH, Berlin Vorrichtung zum Freisetzen eines flüchtigen Wirkstoffs, Verfahren zur Herstellung einer solchen Vorrichtung sowie deren Verwendung
US20180116198A1 (en) * 2013-11-18 2018-05-03 0903608 B.C. Ltd. Compositions, devices and methods for control of pests using vapor activity
ITUB20153228A1 (it) * 2015-08-11 2015-11-11 Angelo Cattapan Evaporatore di acido formico per la lotta alla varroa
DE102017103338B3 (de) * 2017-02-17 2018-04-05 Joachim Meinrad Weiland Verdunstersysteme, umfassend eine Verdunstereinheit für Ameisensäure und ein an die Verdunstereinheit angepasstes Standard-Wabenleerrähmchen
EP3578041B8 (fr) * 2018-06-10 2021-09-15 Famlee Fund GmbH Dispositif de distribution et procede et utilisation correspondants pour la lutte contre les acariens dans les ruches

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US20230017070A1 (en) 2023-01-19
WO2021115558A1 (fr) 2021-06-17

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