Long chained acetates in the defensive secretion of Thysanoptera PDG Tschuch, P Lindemann, A Niesen, R Csuk, G Moritz M-Luther-Univ., Domplatz 4, 06099 Halle, Germany; email@example.com Defensive secretions of several Thysanoptera species were found to contain mixtures of long chained acetates: saturated decyl, dodecyl, tetradecyl, hexadecyl and octadecyl acetate. If the saturated ... [Show full abstract] acetates are solid they are mixed with liquid long chained saturated alkanes, e. g. pentadecane. A further method is to dissolve solid saturated acetates in unsaturated acetates, e. g. (11Z)-11,19-eicosadienyl acetate. Those mixtures spread fast on surfaces and are especially designed to produce a long-lasting coating of sensory organs of potential predators like ants and mites. Furthermore unsaturated acetates act as repellents against ants. Similar mixtures, e g. (11Z)-11-eicosenyl acetate with octadecyl acetate, can be found in Thysanoptera and in some other insects species as well.