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(12) Patent Application Publication (10) Pub. No.: US 2005/0181003 A1 Endepols Et Al

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(12) Patent Application Publication (10) Pub. No.: US 2005/0181003 A1 Endepols Et Al US 2005O181003A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2005/0181003 A1 Endepols et al. (43) Pub. Date: Aug. 18, 2005 (54) RODENTICIDAL BAIT SYSTEMS (30) Foreign Application Priority Data (76) Inventors: Stefan Endepols, Burscheid (DE); May 7, 2002 (DE)..................................... 102 20 271.O Thomas Bocker, Leichlingen (DE) Publication Classification Correspondence Address: BAYER CROPSCIENCE LP (51) Int. Cl." ..................................................... A01N 25/08 Patent Department (52) U.S. Cl. .............................................................. 424/410 100 BAYER ROAD PITTSBURGH, PA 15205-97.41 (US) (57) ABSTRACT (21) Appl. No.: 10/513,525 The present invention relates to water-based rodenticidal (22) PCT Filed: Apr. 24, 2003 gels which do not cure, remain attractive to harmful rodents for long period, retain their Viscosity and adhere perma (86) PCT No.: PCT/EP03/04250 nently to Surfaces. US 2005/0181.003 A1 Aug. 18, 2005 RODENTICIDAL BAT SYSTEMS this case, the control measures would be effective if a bait 0001. The present invention relates to water-based roden which is palatable to rats and mice and which cannot be spilt ticidal gels which do not cure, remain attractive to harmful or carried away would be attached above or next to the rodents for long periods, retain their Viscosity and adhere Stored products which Serve as food Supply to the harmful permanently to Surfaces. rodents. This bait must be attractive and contain high-quality food or feed in order to be accepted by the rodents as an 0002. As a rule, harmful rodents are controlled using alternative food Source. If Such a bait were applied without rodenticide-containing feed baits. Conventional baits are made from loose cereals and a liquid or pulverulent premix bait box, it would additionally be ensured that the control containing the active ingredient. The product is a flowable measures are not encumbered by the animals fear of these cereal bait. If the mixture is treated with liquid paraffin and containers. extruded, pellets or granules can be produced. The advan 0008 Abait which meets these requirements is unknown. tage of these variants over the flowable baits is the homo While pasty baits which are based on oils and fats and which geneous distribution of the active ingredient. Wax bars are can be applied for example by Squeezing a cartridge and likewise produced from a paraffin-containing premix. This initially adhere to the surface (for example JP 60255701) premix is extruded or poured into bars 10g-100 g in weight. have been developed, these pastes frequently have the Bars are easily handled, but, as a rule, not very attractive to rodents owing to the high paraffin content. A modern devel disadvantage that oil leaks from the cartridge when preSSure opment which combines the ease of handling of the wax bars is exerted, i.e. upon use, which makes neat handling impos with high attraction to rodents is the rodenticidal bait paste. Sible. Moreover, the oil spreads on the treated Surface and Rodenticidal pastes are based on ground cereals and Veg the baits turn rancid and thus become unattractive and etable oils. Pastes are usually packaged in paper Sachets in ineffective. They cure and then no longer adhere to the 10g-100g portions. Low-viscosity pasty baits may also be Surface. Resulting particles may contaminate foodstuffs and packaged in cartridges. feeding Stuffs. 0.003 Flowable baits must be applied in containers such 0009 Non fatty formulations are likewise known. How as dishes or bait boxes. Wax bars and paste Sachets are ever, they do not contain energy-containing feeding Stuffs placed in covered locations in Such a way that they are and are therefore not baits (for example WO 2001/080645), protected from the effects of the weather. In animal houses, but concentrates or stickers (for example WO98/04129, RU baits must be applied in Such a way that they remain 2077200, DD 271012), have a shelf life of only a few days unaffected by cleaning and disinfection work. In general, the (for example Veterinariy 1990, No. 2, 29-30), are only user of baits must ensure that anybody who is unauthorized suitable for controlling moles (for example U.S. Pat. No. Such as, for example, children and non-target animals, Such 6,264.969, FR 2767464), are intermediates in bait produc as, for example, domestic animals, cannot access the bait. tion, but are not ready for use (for example EP97093, U.S. 0004 Harmful rodents, in particular rats and mice, fre Pat. No. 4,480,089). Such mixtures frequently contain a quently attack properties where foodstuffs or feeding Stuffs number of chemicals which make the product useleSS for use are being Stored. Since they are capable of transmitting and in baits, owing to the repellent odour (for example JP excreting a number of pathogens, harmful rodents are con 51033964). It is known that such concentrates are produced trolled intensively in these Susceptible Spaces. Hygiene on the basis of polyethylene glycol (PEG); for example JP programmes generally demand regular, prophylactic control 48001121. However, PEG is not eaten by rodents, but is only and monitoring. The control measures must meet two essen Suitable as carrier in what are known as Stickers. Upon tial criteria: 1.) The bait used must be sufficiently attractive contact, they Stick to the animals coat, but the animals only to the harmful rodents that they ingest it even in the presence ingest the active ingredient when they clean their coats (see of an excess of high-quality feed alternatives, and 2.) These also JP 44012440). Other agents which ingested by rodents rodenticides must be applied in Such a way that they must under certain circumstances, while being, are based, inter not come into contact with the Stored products or non-target alia, on pectin or agar agar and therefore deteriorate rapidly animals. and are therefore not suitable as baits (for example EP 0005 Pastes and flowable baits are preferably used owing 2129376). Also known are water-in-oil dispersions (WO to their good palatability. These baits are applied in Specific 2002/010212), hydrophobic, waxy formulas (FR 2067818) bait containers to minimize any chances of contaminating and gels which are provided with acute poisons, contain no the Stored goods and to prevent non-target animals from feedstuffs but only flavourings and are applied in Specifically reaching the compositions. Wax bars and pasty baits are developed containers for controlling exotic pests (EP additionally Secured by tying. 1094705). 0006. As a rule, bait boxes must be used to ensure safe 0010. The invention aims at providing a bait system application. These bait boxes are normally placed on the without the abovementioned disadvantages. ground So that no bait can reach the Stored products when 0011. The present invention relates to a new bait system rats or mice Scratch in the bait containers. consisting of a water-based rodenticidal gel which remains 0007. The disadvantage of this application technique is attractive to harmful rodents over a long period, does not that the bait containers can frequently not be positioned cure, retains its Viscosity and adheres permanently to Sur where rats and mice prefer to dwell. These animals fre faces. These gels according to the invention are applied quently nest in cavities of walls and ceilings, from where without packaging or Specially developed containers and are they can reach the Stored products without running on the packaged ready for use. They can be applied Safely and ground, for example via pipes, shelves and dividing walls. In without bait boxes. US 2005/0181.003 A1 Aug. 18, 2005 0012. The gels according to the invention are dimension nones, for example (“difethialone'). Further anticoagulants ally stable, readily deformable disperse-systems encompass which are Suitable for preparing the bait according to the ing the following components: invention and which may be mentioned are the following 2-azacycloalkylmethyl-Substituted benzhydryl ketones and 0013) (a) water as dispersant; benzhydrylcarbinols: 1-phenyl-3-(2-piperidyl)-1-(p-tolyl)- 0014) (b) thickener; 2-propanone, 3,3-diphenyl-1-(2-pyrrolidinyl)-2-pentanone, 1,1-diphenyl-3-2-(hexahydro-1H-azepinyl)-2-propanone, 0015 (c) active compound(s); 1-(4-fluorophenyl)-1-phenyl-3-(2-piperidyl)-2-propanone, 0016 (d) bait materials; 1-(4-methylthiophenyl)-1-phenyl-3-(5,5-dimethyl-2-pyrro lidinyl)-2-propanone, 1-(p-cumenyl)-1-phenyl-3-(tert-butyl 0017) (e) preservative. 2-piperidinyl)-2-propanone, 3,3-diphenyl-1-2-(hexahydro 0.018. In a preferred embodiment, the gels according to 1H-azepinyl-2-butanone, 3-(2,4-dichlorophenyl)-3-phenyl the invention additionally encompass one or more of the 1-(2-piperidyl)-2-heptanone, 1,1-diphenyl-3-(5-methyl-2- following components: pyrrolidinyl)-2-propanone, 3,3-diphenyl-1-(2-piperidyl)-2- butanone, C-(C.-methyl-O-phenylbenzyl)-2- 0019 (f) base; piperidinethanol, C-(C-ethyl-O-phenylbenzyl)-2- pyrrolidinethanol, (2,5-dimethyl-O-phenylbenzyl)-2- 0020 (g) humectant; piperidinethanol and C-(diphenylmethyl)-2-(hexahydro-1H 0021) (h) antioxidants; azepin)ethanol and their salts, which are described in DT-OS 2 417 783, and 4'-(fluorophenyl)-2-(2-pyrrolidinyl)-ac 0022) (i) colours; etophenone, 4'-phenyl-2-(5,5-dimethyl-2-pyrrolidinyl)-ac 0023 (i) bittering agents; etophenone, 4'-p-(trifluoromethyl)-phenyl-2-(2-pip eridyl)-acetophenone, 4'-(p-butoxyphenyl)-2-(4-tert-butyl 0024 (k) additives. 2-piperidyl)-acetophenone, 2'-phenoxy-2-(2-piperidyl)- 0.025 Organic
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