Abstract:
The present invention relates to a microcapsule comprising a capsule core, which contains a pheromone, and a capsule wall, which contains in polymerized form 30 to 90% by weight of one or more C1-C24-alkyl esters of acrylic acid and/or methacrylic acid, acrylic acid, methacrylic acid and/or maleic acid (monomers I), 10 to 70% by weight of one or more difunctional and/or poly-functional monomers (monomers II), and 0 to 40% by weight of one or more other monomers (monomer III), in each case based on the total weight of the monomers. The invention further relates to a process for the preparation of said microcapsules; a method for controlling undesired insect infestation; and a composition for controlling undesired insect infestation comprising a pheromone and ethyl 3-methylbutanoate.