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Antifeedant and toxic effects of drimanes on Colorado potato beetle larvae
Author(s) -
Gols G. J. Z.,
Loon J. J. A.,
Messchendorp L.
Publication year - 1996
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1996.tb00810.x
Subject(s) - leptinotarsa , colorado potato beetle , biology , solanum tuberosum , larva , cuticle (hair) , insect , botany , solanaceae , pest analysis , red flour beetle , leaf beetle , horticulture , biochemistry , genetics , gene
Abstract Among the drimane compounds tested, the dialdehydes polygodial and warburganal were the most active as antifeedants against Colorado potato beetle larvae, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae), in a dual‐choice assay with potato, Solanum tuberosum L., leaf discs. Lactones were less effective. Direct observations showed that decreased feeding on leaf discs treated with polygodial and warburganal was accompanied by increased locomotory activity. Topical application of these two compounds on the insect's cuticle decreased food intake of untreated leaf discs, indicating that besides deterrent effects, toxic properties of these molecules influence feeding behaviour.