Effects of extracts from fruit and leaves of Melia azedarach L. on Locusta migratoria migratorioides (R. et F.)
1991
Wen, J.-H. (Giessen Univ. (Germany). Inst. fuer Phytopathologie und Angewandte Zoologie) | Schmutterer, H.
Water extracts, methanolic extracts and the petrol ether phase from the fruit and leaves of Melia azedarach L. were tested against different instar nymphs of Locusta migratoria migratorioides (R. et F.) under laboratory conditions. Water extracts caused various degrees of mortality and a significant delay in the development and growth of the locusts. Treatments with 3 per cent concn of water extracts from fruit and leaves at a rate of 40 ml/square metre gave 93 per cent and 100 per cent mortalities, respectively, of first instars, and a 3 per cent concn of leaf extract resulted in a mortality of 93.2 per cent of third instars. Antifeedant and/or stomach-poison effect(s) played an important role. MeOH extracts had the same efficacy as water extracts, but the petrol ether phase did not show much effect on the locusts
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