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Bait Compositions and Methods for Controlling a Pest by Physical Effects

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Bait Compositions and Methods for Controlling a Pest by Physical Effects (19) TZZ¥Z ¥_T (11) EP 3 025 583 A1 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.: 01.06.2016 Bulletin 2016/22 A01N 25/00 (2006.01) A01P 7/00 (2006.01) A01P 9/00 (2006.01) (21) Application number: 15196294.1 (22) Date of filing: 25.11.2015 (84) Designated Contracting States: (72) Inventors: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB • BERENGARDT, Ina GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO 51467 Bergisch Gladbach (DE) PL PT RO RS SE SI SK SM TR • BUBLITZ, Mike Designated Extension States: 51399 Burscheid (DE) BA ME • RADECKI, Claudia Designated Validation States: 51429 Bergisch Gladbach (DE) MA MD • RODRIGUEZ Y FISCHER, Nicolas 50676 Köln (DE) (30) Priority: 28.11.2014 EP 14195431 (74) Representative: f & e patent (71) Applicant: BioGenius GmbH Fleischer, Engels & Partner mbB, Patentanwälte 50429 Bergisch Gladbach (DE) Braunsberger Feld 29 51429 Bergisch Gladbach (DE) (54) BAIT COMPOSITIONS AND METHODS FOR CONTROLLING A PEST BY PHYSICAL EFFECTS (57) The present invention relates to bait composi- tion), to methods for controlling a pest by physical effects tions containing a swellable agent (preferably swellable employing said bait compositions and to the use of a hydrophilic polymer) having a median particle size Dv50 swellable agent for controlling a pest ingesting said bait of 100 μm and a phagostimulant for controlling a pest by composition. physical effects (eg. rupture of organs or dessicating ac- EP 3 025 583 A1 Printed by Jouve, 75001 PARIS (FR) 1 EP 3 025 583 A1 2 Description tivity ofthe active agent.Even thoughattempts have been made to provide a mere physical controlling effect on a [0001] The present invention relates to bait composi- target organism exerted exclusively by the swellable tions for controlling a pest by physical effects, to methods agent after ingestion, i.e. oral uptake by the target organ- for controlling a pest by physical effects employing said 5 ism, the obtained results were not fully satisfying. Hence, bait compositions and to the use of a swellable agent for commerciallyavailable formulations stillrely on theaction controlling a pest ingesting a composition, which com- of chemical and/or biological pesticides. prises said swellable agent by physical effects. [0008] It has surprisingly been found that ingestion of [0002] Conventional pesticidal bait compositions usu- a bait composition according to the present invention ally rely on the toxic effects of a stomach poison com- 10 which comprises at least a swellable agent in the form prising a chemical or biological toxicant. For instance, of particles having a median particle size Dv50 of 100 insecticidal bait compositions often employ one or more mm or less and at least a phagostimulant, but is substan- chemical toxicants, examples of which include organo- tially free of any pesticidal agent exerting a controlling chlorine, organophosphate, neonicotinoid, carbamate effect on the target organism by chemical or biological and pyrethroid pesticides. Neonicotinoids are a class of 15 action provides sufficient means for pest control, leading highly potent chemical insecticides, which can be em- to death of the target organism by substantially mere ployed as stomach or contact poison. physical effects. [0003] However, in recent years neonicotinoids have [0009] As the composition of the present invention is come under increasing scrutiny over environmental im- substantially free of any pesticidal agent exerting a con- pacts, including honey-bee colony collapse disorder,20 trolling effect on the pest by chemical or biological action leading to restrictions and bans on their use in several after ingestion of the composition by the pest, it is non- countries. In addition, exposure to conventional chemical toxic and safe to human health and the environment. pesticides can cause a variety of adverse health effects Remnants of the bait composition do not require special in humans, ranging from simple skin irritations to affecting waste disposal and can be deposited in the general the nervous system, affecting the hormone system and 25 household waste. The bait composition of the present causing cancer. invention is therefore also especially suitable for in- [0004] Although various attempts have been made to house/domestic use. Advantageously the bait composi- develop target-specific pesticides with less off-target ef- tions and methods of the present invention are also suit- fects, including the use of naturally occurring substances able to control species, which have developed resistance (biopesticides), to reduce detrimental effects on the30 to common chemical or biological pesticides. health of non-target species and the environment, there [0010] In terms of the present invention the term "bait is still a need for safer compositions. composition" refers to a composition that attracts a target [0005] It is therefore an object of the present invention organism and is ingested by the target organism through to provide an environmentally friendly bait composition its oral opening, i.e. consumed by oral uptake. Upon in- for controlling a pest as well as methods for pest control 35 gestion the bait composition preferably may get into the using such a composition and for the preparation of such gastro-intestinal tract of said organism to exert a control- compositions. Furthermore the composition should be ling effect on said organism by physical, preferably me- easy to handle and be non-toxic to the user and further chanical effects. non-target organisms, in particular to mammals. [0011] In terms of the present invention the term "con- [0006] This object is met by the bait composition and 40 trolling effect by biological or chemical action" refers to methods of the present invention. The bait composition the toxic effects exerted by common chemical and bio- of the present invention comprises at least one swellable logical pesticidal agents including e.g. organochlorine, agent and at least one phagostimulant to induce inges- organophosphate, neonicotinoid, carbamate and pyre- tion of the composition by the pest, but is substantially throid pesticides after oral uptake. In particular the term free of any pesticidal agent exerting a controlling effect 45 "biological or chemical action" refers to effects occurring onthe pestby chemical or biological actionafter ingestion in the target organism due to a (bio)chemical reaction of the composition by the pest. with or induced by said pesticide or a metabolite thereof. [0007] Various pesticidal compositions are known that, Common pesticides act e.g. on the central nervous sys- besides conventional chemical and/or biological toxi- tem or the reproductive system of an animal target or- cants (pesticides), comprise, among others, a so-called 50 ganism. However, said term does not include chemical superabsorbent polymer (SAP), commonly as carrier or biological substances in general. Rather chemical material and/or formulation aid. SAPs are cross-linked and/or biological substances, which are palatable to the polymers that have the ability to absorb several to some target organism without exerting a controlling effect on hundred times their own weight of deionized water and said target organism upon ingestion, may be present in thus are swellable agents in the sense of the present55 the composition. Substances, which may be present in invention. For instance, WO 89/12450 A1 discloses the the composition, also include preservatives, which may use of SAPs in pesticidal delivery agents for the control act as fungicide, bactericide and/or antiseptic. The term of terrestrial insects to enhance the distribution and ac- "pesticidal agents" according to the present invention 2 3 EP 3 025 583 A1 4 preferably refers to an agent selected from the list con- dine), chloridazon (aka pyrazone), chlorimuron, chlorine sisting of: 1,1-dichloro-2,2-bis-(4-ethyl-phenyl)ethane, dioxide, chlormephos, chlormequat, chlorobenzilate, 1,2-dibromoethane, 1,2-dichloroethane, 1,2-dichloro- chloroneb, chlorophacinone, chloropicrin, chloropro- propane, 1,3,5-tri-(2-hydroxyethyl)-hexa-hydro-s-tri- pylate, chlorothalonil, chlorotoluron, chloroxuron, chlo- azyne, 1,3-dichloropropene, 1,3-diphenyl urea, 1,4-5 rphonium chloride, chlorpropham, chlorpyrifos, chlorpy- dimethylnaphthalene, 2,3,6-trichlorobenzoic acid, 2,4,5- rifos-methyl, chlorsulfuron, chlorthal-dimethyl, chlorthia- trichlorophenoxyacetic acid, 2,4-dichlorophenoxyacetic mid, chlorthiophos, chlozolinate, chromafenozide, cini- acid, 4-(2,4-dichlorophenoxy)butyric acid, 2-(dithiocy- don ethyl, cinosulfuron, clethodim, clodinafop, clofencet, anomethylthio)-benzothiazol, 2-aminobutane (aka sec- clofentezine, clomazone, clomeprop, clopyralid, cloquin- butylamine), 8-hydroxyquinoline, abamectin (aka aver- 10 tocet mexyl, clothianidin, copper complex: 8-hydroxyqui- mectin), acephate, acequinocyl, acetamiprid, acetochlor, noline with salicylic acid, copper hydroxide, copper oxide, acibenzolar-S-methyl (benzothiadiazole), acifluorfen, copper oxychloride, coumachlor, coumafuryl, cou- aclonifen, acridinic bases, acrinathrin, AD-67 (4-(dichlo- maphos, coumatetralyl, cresylic acid, crimidine, cryolite, roacetyl)-1-oxa-4-azaspiro[4.5]decane, alachlor, alany- cufraneb, cumylphenol, cyanamide (H & Ca cyanamide), carb, aldicarb, aldimorph, aldrin, alkyl mercury com-15 cyanazine, cyanides: including calcium, hydrogen, sodi- pounds, alkyloxyl and aryl mercury compounds, allethrin, um cyanides, cyantraniliprole, cyazofamid, cyclanilide, alloxydim, allyl alcohol,alpha-cypermethrin
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