PREVENTION OF DISEASES IN HONEYBEES AND REDUCTION OF PESTICIDE RESIDUES IN BEESWAX

Abstract

A beeswax and/or beehive or bee keeping equipment surface is treated with a composition containing at least one solvent, at least one surfactant and at least one oxidizing agent (e.g., peroxide), optionally also containing other components such as an oxidizing agent activator, a viscosifying agent, an enzyme and/or a pH control agent, to reduce the amount of pesticide residues on the beeswax surface and/or disinfect against any bacterial, viruses, and fungi infestation.

Claims

1. A method of inactivating viruses in beeswax, beehives and/or beehive equipment, comprising contacting a beeswax, beehive and/or beehive equipment surface with a composition comprised of at least one solvent, at least one peroxide and at least one surfactant wherein said composition is activated by subjecting the composition to cold plasma ionizing during a fogging process before the composition contacts the beeswax, beehive and/or beehive equipment surface.

2. The method of claim 1, wherein the composition is additionally comprised of at least one peroxide activator.

3. The method of claim 2, wherein the at least one peroxide activator is applied separately to the beeswax surface in a different step than the at least one peroxide.

4. The method of claim 2, wherein the at least one peroxide activator comprises at least one peroxide activator selected from the group consisting of metal-containing peroxide activators, carbonate salts and combinations thereof.

5. The method of claim 2, wherein the composition is comprised of from about 0.001% to about 20% by weight or from about 0.001% to about 5% by weight peroxide activator.

6. The method of claim 1, wherein the at least one solvent comprises at least one solvent selected from the group consisting of water, water-miscible or partially water-miscible organic solvents and combinations thereof.

7. The method of claim 1, wherein the at least one solvent comprises at least one water-miscible or partially water-miscible organic solvent selected from the group consisting of alcohols, ethers, esters and ketones.

8. The method of claim 1, wherein the at least one solvent comprises at least one water-miscible or partially water-miscible organic solvent selected from the group consisting of carbonate esters.

9. The method of claim 1, wherein the composition is comprised of from about 0.1% to about 90% or from about 1% to about 60% by weight solvent.

10. The method of claim 1, wherein the at least one peroxide comprises at least one peroxide selected from the group consisting of hydrogen peroxide, peroxyacids, peroxycarbonates, urea hydrogen peroxide, perborate compounds, and combinations thereof.

11. The method of claim 1, wherein the composition is comprised of from about 0.1% to about 70%, from about 1% to about 15%, or from 1% to about 8% by weight peroxide.

12. The method of claim 1, wherein the at least one surfactant comprises at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and combinations thereof.

13. The method of claim 1, wherein the at least one surfactant comprises at least one surfactant selected from the group consisting of organomodified siloxane non-ionic surfactants, polyalkoxylated sorbitan carboxylates, alkyl sulfate surfactants, alcohol ethoxylate surfactants, polysorbate surfactants and combinations thereof.

14. The method of claim 1, wherein the composition is comprised of from about 0.01% to about 30% or from about 0.01% to about 10% by weight surfactant.

15. The method of claim 1, wherein the contacting is carried out at a temperature of from about 10° C. to about 50° C.

16. The method of claim 1, wherein the composition is additionally comprised of at least one viscosifying agent and/or gelling agent.

17. The method of claim 17, wherein the composition is comprised of from about 0.01% to about 10.0% by weight or from about 0.1% to about 5.0% by weight in total of viscosifying agent and/or gelling agent.

18. The method of claim 1, wherein the composition further comprises at least one viscosifying agent and/or gelling agent.

19. The method of claim 1, wherein the composition is comprised of from about 0.01% to about 10.0% by weight or from about 0.1% to about 5.0% by weight in total of viscosifying agent and/or gelling agent.

20. The method of claim 1 wherein the virus is viral diseases selected from the group consisting of Cripaviridae, Chronic bee paralysis virus, Dicistroviridae, Acute bee paralysis virus, Israeli acute paralysis virus, Kashmir bee virus, Black queen cell virus, Cloudy wing virus, Sacbrood virus; Iflaviridae – Deformed wing virus, Kakugo virus; Iridoviridae – Invertebrate iridescent virus type 6, Secoviridae - Tobacco ringspot virus, and Lake Sinai virus.

21. The method of claim 1 wherein the virus is viral disease selected from the group consisting of Israeli acute paralysis virus, acute bee paralysis virus, Kashmir bee virus, black queen cell virus, deformed wing virus/Kakugo virus, Varroa destructor virus, sacbrood virus slow bee paralysis virus, chronic bee paralysis virus and Lake Sinai virus.

Description

DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS OF THE INVENTION

Surfactants

[0073] The composition utilized in the process of the present invention is comprised of at least one surfactant (surface active agent). Two or more surfactants may be employed in certain embodiments of the invention. The surfactant or surfactants may be selected to be effective in wetting a beeswax,beehive or beekeeping equipment surface and allowing good penetration of the composition on the entire surface to be treated, thereby helping to lift pesticide residues (and/or oxidation or decomposition products thereof) off the surface or disinfect the surface. For example, the surfactant(s) may assist in solubilizing and/or emulsifying the pesticide residues and/or decomposition products thereof formed by reaction of the pesticide residues with oxidizing agent (e.g., peroxide). Any known type of surfactant or combination of known surfactant types may be employed such as, for example, anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and combinations thereof. Suitable surfactants, only provided herein as non-limiting examples, include organomodified siloxanes (e.g., the surfactants sold by Evonik under the brand name Break-thru® or the surfactant sold by Dow Corning under the brand name Xiameter® OFX-0309 fluid), alcohol ethoxylate surfactants (e.g., the surfactants sold by Air Products under the brand name Tomadol®), polysorbate surfactants (e.g., the surfactant sold by Croda under the brand name Tween™ 20) and alkyl sulfates such as ammonium lauryl sulfate (ALS). A variety of surfactants (which may also be referred to as wetting agents) as well as combinations of surfactants (wetting agents) can be selected, keeping in mind that such surfactants should advantageously be stable and compatible with the other components of the composition, nontoxic to honey bees and other pollinators, and environmentally friendly at the selected use rate. In various embodiments of the invention, the surfactant(s) is or are present in the composition at a concentration of 0.01 to 30% by weight or 0.01 to 10% by weight.

Solvents

[0074] One or more various solvents that are compatible with the other components of the composition can be used. Water, but also organic solvents or a combination or water and organic solvents in various proportions, can be present in the composition to be employed in the pesticide reduction and/or disinfection method of the present invention. Suitable illustrative organic solvents include, but are be limited to, alcohols in particular C2-C6 aliphatic mono-alcohols and glycols such as ethanol, isopropanol, tert-butanol, propylene glycol and derivatives thereof (e.g., glycol ethers). Other suitable organic solvents include organic carbonates, particularly propylene carbonate. The role of the solvent in the composition may be both to act as a carrier for the other components of the composition and to aid in solubilizing lipophilic pesticide residues present on the surface to be decontaminated and/or the derivative byproducts formed by reaction of the oxidizing agent(s) with the pesticide residues. The total amount of solvent in the composition may be, for example, between 0.1% and 90% or between 1% and 60% by weight, in various exemplary embodiments of the invention. The solvent or combination of solvents present in the composition, and the amount(s) thereof, may be selected, in coordination with the other components, so as to provide the composition in the form of a solution or an emulsion (e.g., a water-in-oil emulsion or an oil-in-water emulsion).

Oxidizing Agents

[0075] The composition used to reduce pesticide residues and/or disinfect the beehives/bee keeping equipment in accordance with the present invention includes at least one oxidizing agent, which may be any organic or inorganic compound capable of oxidizing one or more of the compounds present in the pesticide residues present on the beeswax surface or disinfect, that is treat against any bacterial, viruses, fungi, protozoa and mite infestation. Oxidizing agents can be selected from a variety of peroxides, for example, such as, but not limited to, inorganic and organic peroxides such as hydrogen peroxide or peroxide generating compounds such as percarboxylic acids (e.g., peracetic acid), peroxycarbonates, urea hydrogen peroxide, perborate compounds, as well as similar compounds and/or a combination of such compounds. In certain embodiments of the invention, the oxidizing agent or combination of oxidizing agents is soluble in the solvent(s) present in the composition. The concentration of oxidizing agent in the composition may be between 0.1 and 70%, or between 1 and 15%, or between 1 and 8% by weight.

Activators

[0076] The composition can be activated by the presence of an activator for the oxidizing agent, i.e., a substance that assists in catalyzing or otherwise promoting oxidation of pesticide residues or in disinfecting against any bacterial, viruses, fungi, protozoa and mite infestation. For example, the activator may convert the oxidizing agent into a more reactive substance, e.g., a substance better able to oxidize the pesticide residues than the oxidizing agent itself or better able to disinfect against any bacterial, viruses, fungi, protozoa and mite infestation. In certain embodiments of the invention, the oxidizing agent formulated into the composition may be regarded as an oxidizing agent precursor, which by itself has little or no reactivity towards the pesticide residues or disinfection impact but which is transformed in situ to a reactive oxidizing agent through interaction with an activator as described herein. Post-addition of an activator to a composition in accordance with the present invention may be practiced. The activator may be added to the composition right before application of the composition to a beeswax surface or independently applied to the surface to be treated (e.g., prior to, simultaneous with or following the application of the composition to the surface of the beeswax). Activators can be, for example, metal-containing substances such iron oxide (Fenton reaction), carbonate compounds (e.g., salts of carbonic acid such as potassium or sodium bicarbonate), a more complex activator such as Fe-TAML (tetra-amido macrocyclic ligand) developed at Carnegie Mellon or any activator or combination of activators that are known to induce the formation of free radical compounds under various conditions (including the use of UV light). The concentration of activator in the composition may be, for example, between 0.001 % and 20% by weight or between 0.001 % and 5% by weight.

[0077] In one embodiment of the invention, the incorporation of an activator in the composition is avoided and the composition instead activated by subjecting the composition to a physical treatment step such as exposing the composition to a source of energy such as electric or photonic energy (e.g., cold plasma ionization). For example, where the oxidizing agent is a peroxide, cold plasma ionization may generate free radical species or other highly reactive species from the peroxide, wherein the free radical species or other highly reactive species are more reactive towards the pesticide residues than the starting peroxide. In one embodiment, the composition is applied to a beeswax surface by fogging, wherein the vaporized composition is subjected to cold plasma ionization.

pH Control Agents

[0078] The pH of the composition may be adapted or adjusted to fall within a desired or advantageous pH range (e.g., a pH of about 2 to about 10) with the addition of any acid and/or base as a pH control agent, to improve or optimize the effectiveness or performance of the composition in reducing levels of pesticide residues present in a beeswax surface and/or disinfecting against any bacterial, viruses, fungi, protozoa and mite infestation. The amount and type of acid and/or base are not particularly limited. For example, weak and/or strong acids, organic and/or inorganic acids, weak and/or strong bases, and/or organic and/or inorganic bases may be employed. The composition may be formulated to include a buffer system as a pH control agent.

Enzymes

[0079] The compositions used in the pesticide reduction method of the present invention may also contain one or more enzymes, which may be selected to be broad acting or specific to particular targeted pesticides or pesticide families and/or bacterial, viruses, fungi, protozoa and mites. Such enzymes may be part of the composition as initially brought into contact with a beeswax surface or added after application. In various embodiments of the invention, the enzyme concentration may be between 0.1 and 20% by weight or between 0.1 and 5% by weight.

Viscosifying Agents/Gelling Agents

[0080] The composition can be gelled or otherwise increased in viscosity for better retention on the beeswax,beehive and/or bee keeping equipment surface using at least one viscosifying agent, which may be an inorganic viscosifying agent or an organic viscosifying agent or a combination of viscosifying agents. Examples of suitable viscosifying agents include, for example, modified silicas (e.g., the silicas sold by Evonik under the brand names Aerosil® and Sipernat®), high molecular weight crosslinked polyacrylic acid polymers (e.g., the polymers sold by Lubrizol under the brand name Carbopol®), xanthan gums (e.g., the xanthan gums sold by CP Kelco under the brand name Kelzan®) and other such gums (guar gums, alginates and the like), polyol and polyether glycol compounds such as glycerol, polyethylene glycol, polypropylene glycol, and all other viscosifying or gelling agents that are compatible with the other components of the composition and preferably nontoxic to bees and environmentally friendly (e.g., non-persistent and/or biodegradable). The viscosifying agent and/or gelling agent may, in certain embodiments of the invention, act as a thixotropic agent. In various embodiments of the invention, the viscosifying or gelling agent concentration in the composition is between 0.01% and 20% by weight or between 0.1% and 5% by weight.

Formulation of the Composition

[0081] The order and manner in which the above-described components of the composition are combined and formulated are not believed to be particularly limited. Methods and techniques known in the art may be adapted and modified as appropriate, depending upon the types and relative amounts of the components selected for use. In certain embodiments, the composition may be a one-part formulation, having sufficient physical and chemical stability to permit storage at normal conditions (e.g., in drums, tanks or other containers at room temperature) for extended periods of time. Such formulations may then be directly utilized to reduce pesticide residues on beeswax and/or beehive or bee keeping equipment surfaces in accordance with any of the procedures described herein, whereby the composition is contacted with a beeswax surface and/or beehive or bee keeping equipment for a desired amount of time. In other embodiments, the composition may be provided as a multi-part formulation, particularly where certain components of the composition are reactive with each other and it is desired to avoid such reaction until such time as the composition is to be contacted with the beeswax surface and/or beehive or bee keeping equipment. For example, where the composition comprises both a peroxide and a peroxide activator, the peroxide activator may undesirably react prematurely with the peroxide or otherwise transform the peroxide such that the effectiveness of the composition in reducing pesticide residues on beeswax and/or beehive or bee keeping equipment surfaces is reduced if the composition is stored for a long period of time prior to use. In such cases, the composition may comprise two parts which are stored separately, wherein one part comprises the peroxide (and optionally one or more components of the composition other than the peroxide activator) and a second part comprises the peroxide activator (and optionally one or more components of the composition other than the peroxide). The two parts are then combined, in the desired proportions, to obtain the composition, either shortly before application of the composition to a beeswax surface or simultaneous with contacting the beeswax surface. In yet another embodiment, a first part of the composition may be first brought into contact with the beeswax surface, followed by the second part of the composition (which may admix with the first part of the composition in contact with the beeswax surface).

Methods of Use

[0082] In accordance with the present invention, a composition corresponding to the above description is brought into contact with a beeswax surface and/or beehive or bee keeping equipment. The contacting is carried out for a time effective to cause a measurable reduction in the level(s) of one or more pesticides present on or in the surface of the beeswax and/or any bacterial, viruses, and fungi infestation. For example, the concentration(s) of one or more pesticides at the beeswax and/or beehive or bee keeping equipment surface may be reduced at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90% or even 100%. Typically, contact times of from about 1 minute to about 1 hour may be employed, but shorter or longer times may also be practiced. The composition may be heated to at least some extent to accelerate the rate at which pesticide residues at the surface of the beeswax are reduced. However, temperatures at which the beeswax would melt generally should be avoided (beeswax has a melting point of about 62-64° C.). For example, the contacting may be carried out at a temperature of between about 10° C. to about 50° C.

[0083] Generally speaking, the compositions employed in the method of the present invention are liquid in form and therefore any of the techniques known in the art for contacting a liquid composition with a surface may be utilized herein. For example, the composition may be contacted with a beeswax surface and/or beehive or bee keeping equipment by spraying (including spraying at high pressures), immersion (e.g., dipping), fogging (vaporizing), washing, pouring, wiping, spreading, brushing, and the like. The composition may be agitated while in contact with the beeswax and/or beehive or bee keeping equipment surface, including stirring the composition, scrubbing or rubbing the beeswax and/or beehive or bee keeping equipment surface with the composition (using a brush, sponge, abrasive pad or other scrubbing medium, for example). The composition may be formulated with an abrasive substance, so as to promote cleaning of the beeswax and/or beehive or bee keeping equipment surface. The beeswax and/or beehive or bee keeping equipment surface may be successively contacted with multiple portions of the composition (wherein the composition portions may be the same as or different from each other).

[0084] Following the contacting step, one or more further steps may be performed. For example, the composition may be drained, wiped or otherwise removed from the beeswax and/or beehive or bee keeping equipment surface. The beeswax and/or beehive or bee keeping equipment surface may be dried (e.g., air-dried or dried by warm air); any residual composition may thus be dried in place on the beeswax and/or beehive or bee keeping equipment surface. The beeswax surface may be rinsed with a suitable solvent, such as water, an organic solvent or mixture of organic solvents, or a mixture of water and one or more organic solvents (the organic solvent(s) may be the same as or different from the organic solvent(s) present in the composition; preferably, the solvent is selected to be one that does not dissolve beeswax from the beeswax and/or beehive or bee keeping equipment surface under the rinsing conditions). Following a rinse step, the beeswax and/or beehive or bee keeping equipment surface may be dried.

[0085] Within this specification, embodiments have been described in a way which enables a clear and concise specification to be written, but it is intended and will be appreciated that embodiments may be variously combined or separated without departing from the invention. For example, it will be appreciated that all preferred features described herein are applicable to all aspects of the invention described herein.

[0086] In some embodiments, the invention herein can be construed as excluding any element or process step that does not materially affect the basic and novel characteristics of the composition or the method for using the composition. Additionally, in some embodiments, the invention can be construed as excluding any element or process step not specified herein.

[0087] Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.