Growth-inhibiting activity of azadirachtin onCorcyra cephalonica |
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Authors: | G. K. Sharma |
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Affiliation: | 1. Dept. of Entomology, Rajasthan Agriculture University, Agricultural Research Station, 302 018, Durgapura, Jaipur, India
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Abstract: | The growth-inhibiting properties of azadirachtin, a bioeffective triterpenoid compound isolated from neem (Azadirachia indica A. Juss) seeds, was evaluated on the rice moth,Corcyra cephalonica Staint., a serious pest of stored products. By topical application of various azadirachtin doses (0.5 to 10 μg/larva) in methanol to last-instar spinning stage larvae, development was inhibited. The effect was dose-dependent; at higher doses, many of the insects remained in the larval stage (55% with 10 μg/larva). Disturbance of both larval-pupal and pupal-adult molting is discussed and interpreted as interference with the morphogenetic hormone pool size. |
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