2005•Journal of the South China Agricultural UniversityRequires access
Preparation, structural identification and bioactivity of 22,23-dihydroazadirachtin A
Zhixiang Zhang, Cheng Dongmei, Yulin Wu
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Abstract
22,23-dihydroazadirachtin A was synthesized with hydrogenation reaction, and azadirachtin A was the original material. The structure of 22,23-dihydroazadirachtin A was determined with ()~1H NMR. Antifeedant activity of 22,23-dihydroazadirachtin A against larvae of Spodoptera litura, Plutella xylostella and Heliothis armigera was assayed. The results showed that the AFC_(50) of 22,23-dihydroazadirachtin A against 3~(rd) instar larvae of Spodoptera litura were 6.55 and 12.61 μg/mL after 24 and 48 h treatment respectively. After 48 h treatment, the antifeedant level of 3 μg/mL 22,23-dihydroazadirachtin A against 3~(rd) instar larvae of Plutella xylostella was 80.29%, and that of 5 μg/mL 22,23-dihydroazadirachtin A against 3~(rd) instar larvae of Heliothis armigera was 81.16%.