How to cite this article:
Abdul Razak, T., Santhakumar, T., Mageswari, K. and Santhi, S. 2014. Studies on efficacy of certain neem productsagainst Spodoptera litura (Fab.). Journalof Biopesticides, 7, 160-163.
A laboratory study was conducted to testthe efficacy of certain neem products viz., neem oil (NO), neem seedkernel extract (NSKE), neem cake extract (NCE), neem leaf extract (NLE) and onecommercial product Vijaya neem against third instar larva of tobaccocaterpillar Spodoptera litura. The food indices Consumption Index (CI),Efficiency of Conversion of Ingested Food (ECI) and Growth Rate (GR) werederived. NSKE five per cent recorded the lowest CI of 0.428 and GR of 0.130. NOthree per cent showed the lowest ECI of 26.04. Vijayaneem exhibited thehighest antifeedant index (64.75) followed by NSKE five per cent (48.7). Amongthe neem products tested, NSKE five percent showed the highest larval mortalityof 40 per cent. Insect growth regulatory (IGR) effect was recorded both in theNSKE five per cent and NO three per cent treated insects and it was morepronounced in NSKE.
How to cite this article:
Abdul Razak, T., Santhakumar, T., Mageswari, K. and Santhi, S. 2014. Studies on efficacy of certain neem productsagainst Spodoptera litura (Fab.). Journalof Biopesticides, 7, 160-163.
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