Abstract
Laboratory tests showed that neem (Melia azadirachta L.) seed kernel suspension in water at 3% was effective as an antifeedant against all the five instars of the tobacco caterpillar,Spodoptera litura F. The average leaf area consumed by larvae in each petri dish (replication) was 1.2, 3.2, 14.5, 32.5 and 33.3 cm2 in the treatment as against 7.4, 14.2, 58.9, 71.0 and 70.4 cm2 in the control, for twenty 1st, twenty 2nd, two 3rd, two 4th and one 5th instar larvae, respectively. Mortality was observed in the treatment, and to a lesser extent in the controls, only in the first two larval instars.
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References
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Joshi, B.G., Ramaprasad, G. Neem kernel as an antifeedant against the tobacco caterpillar (Spodoptera Litura F.). Phytoparasitica 3, 59–61 (1975). https://doi.org/10.1007/BF02981222
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DOI: https://doi.org/10.1007/BF02981222