SNAIL BAITS

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This invention relates to compositions containing (1) either a) a phosphonic acid ester of the formula (I) in which R stands for C1-C10 alkyl, which is equally or differently substituted once or several times by PO3H2, OH, NH2, CN, halogen, C1-C8 alkylamine or C2-C16 dialkylamine and is optionally interrupted by 1-6 heteroatoms from the series N, O, S, P, wherein heteroatoms are not directly coupled to one another; and contain ammonium-, alkaline metal-, alkaline-earth metal- and/or iron salts; or b) ammonium-, alkaline metal-, alkaline-earth metal and/or iron salts of the phosphonic acid esters of the formula (I) and (2) fine-grained cereal flour, (3) an optional binding agent and (4) optionally one or more additives; to a method for the manufacture of these compounds and to their use for the control of terrestrial snails.