Effect of sunlight on azadirachtin: Antifeeding potency
- 1 January 1982
- journal article
- research article
- Published by Taylor & Francis in Journal of Environmental Science and Health, Part A
- Vol. 17 (1) , 57-65
- https://doi.org/10.1080/10934528209375019
Abstract
Exposure of azadirachtin to sunlight caused a rapid decrease in antifeeding potency against newly emerged 1st instar (0.046 mg) fall armyworm, Spodoptera frugiperda (J.E. Smith), as compared to unexposed azadirachtin. Acetone solutions of azadirachtin exposed to 7 days gave > 50% reduction in activity while azadirachtin exposed for 16 days gave complete reduction in activity with destruction of the compound. p-Aminobenzoic acid, a UV-absorbing additive, gave slight protection to azadirachtin from photodegradation. Azadirachtin, mixed with various plant oils, was exposed to sunlight for 2 wk. Bioassay of these mixtures showed that neem, angelica, castor and calamus oils provided moderate protection (< 25%) to azadirachtin from degradation by sunlight.This publication has 6 references indexed in Scilit:
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