Polymers for increasing the soil mobility of low-solubility insecticides

A method for improving the soil mobility of a sparingly soluble insecticide, wherein a combination of the insecticide, a polymeric solubilizer, and an adjuvant, in an aqueous application form is applied to the soil to be treated, wherein the polymeric solubilizer has the property that the active insecticidal ingredient in a 1% by weight aqueous solution of the polymeric solubilizer at 25° C. and 1.01325 bar has a solubility at least forty times higher than under the same conditions in pure water, and wherein the weight ratio of active ingredient to solubilizer is ≦1, and wherein the solubilizer is selected from groups A1, B1, D and combinations thereof:

• A1. hyperbranched polycarbonates in which the hyperbranched polycarbonate is bonded to at least one linear or comb-type polymer and/or at least one functional C1-C24 unit comprising a carboxylic acid group, a sulfonic acid group, a sulfenic acid group, a sulfinic acid group, a sulfuric ester group, a phosphonic acid group, an amino group or at least two hydroxyl-C2-C10-alkyl groups;
• B1. vinyllactam copolymers obtained from
• B1-1. 60-99% by weight (based on the overall copolymer) of 5-7-membered 1-vinyl-2-lactam and
• B1-2. 1 to 40% by weight of at least one monomer selected from the group of the
• B1-21 C8-C30-alkyl esters of monoethylenically unsaturated C3-C8-carboxylic acids,
• wherein the percentages by weight of the individual components add up to 100% by weight;
• D. copolymers based on ethylenically unsaturated dicarboxylic mono- and diesters, obtained from
• D1 at least one monomer from the group of olefins, vinyl ethers and styrene and
• D2 at least one monomer from the group of mono- and diesters of ethylenically unsaturated dicarboxylic acids, wherein the alcohol group of the ester has a structure of the formula (V)
• —(R10—O)n—(R11—O)p—R12 (V)
• wherein:
• R10 is 1,2-propylene or 2,3-propylene;
• R11 is ethylene;
• R12 is H, unbranched or branched C1-C40-alkyl, phenyl, phenyl substituted by C1-C20-alkyl, benzyl, benzyl substituted by C1-C20-alkyl;
• n is an integer from 0 to 140 and
• p is an integer from 0 to 100,
• wherein the sum of n and p is at least 1,
• wherein the insecticide is selected from the group consisting of fipronil, allethrin, alpha-cypermethrin, beta-cyfluthrin, bifenthrin, bioallethrin, 4-chloro-2-(2-chloro-2-methylpropyl)-5[(6-iodo-3 -pyridinyl)methoxyl]-3 (2H)-pyridazinone (CAS-RN:
• 120955-77-3), chlorantraniliprole, chlorfenapyr, chlorpyrifos, cyantraniliprole, cyfluthrin, cyhalothrin, cypermethrin, deltamethrin, etofenprox, fenoxycarb, flufenoxuron, hydramethylnon, imidacloprid, indoxacarb, metaflumizone, permethrin, pyriproxifen, tebufenozide and tralomethrin.