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Response ofSpodoptera littoralis (Boisd.) andEarias insulana (Boisd.) larvae to azadirachtin and salannin

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Abstract

The effect of azadirachtin and salannin, two triterpenoids isolated from seeds of neem (Azadirachta indica A. Juss), on the feeding response ofSpodoptera littoralis (Boisd.) andEarias insulana (Boisd.) larvae, was investigated. Styropor (foamed polystyrene) lamellae were painted on both sides with a mixture of 5% sucrose with different concentrations of either azadirachtin or salannin dissoled in methanol-water (3∶7). Azadirachtin strongly suppressed feeding inS. littoralis larvae even at 0.001%, whereas salannin showed some antifeedant activity at 0.005% and above. Larvae ofE. insulana were deterred from feeding on azadirachtin-treated lamellae even at 0.005%, whereas salannin was effective only at 0.01% and above. Azadirachtin applied on cotton leaves deterred larvae ofS. littoralis from feeding at all concentrations ranging between 0.001 and 0.02%.

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Authors and Affiliations

  1. Div. of Toxicology, ARO, The Volcani Center, Bet Dagan, Israel

    J. Meisner, K. R. S. Ascher & R. Aly

  2. Biologically Active Natural Products Laboratory, Agricultural Environmental Quality Institute, Agricultural Research Center, U.S.D.A., 20705, Beltsville, MD, U.S.A.

    J. D. Warthen

Authors
  1. J. Meisner
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  2. K. R. S. Ascher
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  3. R. Aly
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  4. J. D. Warthen
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Publication of the Agricultural Research Organization. No. 307-E, 1980 series.

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Meisner, J., Ascher, K.R.S., Aly, R. et al. Response ofSpodoptera littoralis (Boisd.) andEarias insulana (Boisd.) larvae to azadirachtin and salannin. Phytoparasitica 9, 27–32 (1981). https://doi.org/10.1007/BF03158326

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  • DOI: https://doi.org/10.1007/BF03158326

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