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Tall oil: enhancement of neem and azadirachtin toxicity to the variegated cutworm, Peridroma saucia Hübner (Lep., Noctuidae)
Author(s) -
Xie Y. S.,
Isman M. B.
Publication year - 1995
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1995.tb01301.x
Subject(s) - azadirachtin , cutworm , biology , noctuidae , meliaceae , neem oil , larva , instar , toxicology , toxicity , botany , pesticide , agronomy , chemistry , organic chemistry
Potentiation of the insecticidal activity of neem and its active principle, azadirachtin, by depitched tall oil was examined in experiments with the variegated cutworm, Peridroma saucia Hübner. Contact toxicity of both neem and azadirachtin to P. saucia was enhanced more than 2 fold when formulated in combination with depitched tall oil, compared to that with the insecticides alone. Nutritional analyses of fourth instar larvae following topical application of neem or azadirachtin in combination with depitched tall oil demonstrated stronger inhibition in larval growth, diet consumption, and dietary utilization than when the test materials were administered alone. These results suggest that the oil enhances the bioavailability of azadirachtin to target tissues or receptors in the insect. Depitched tall oil also enhanced the antifeedant effect and residual action of neem and azadirachtin on cabbage plants to P. saucia larvae.