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Eco-friendly management of Scirpophaga incertulas (Walk.) and Cnaphalocrocis medinalis (Guen.) in Basmati rice



Eco-friendly management of Scirpophaga incertulas (Walk.) and Cnaphalocrocis medinalis (Guen.) in Basmati rice



Annals of Plant Protection Sciences 16(1): 11-16



A field experiment was conducted in Meerut, Uttar Pradesh, India, during the kharif season of 2005 to study the effects of cartap hydrochloride 4 G at 0.75 kg a.i./ha, Beauveria bassiana at 2.5 kg/ha, Bacillus thuringiensis at 1.5 kg/ha, imidacloprid 17.8 SL at 0.05%, Trichogramma japonicum at 100 000 eggs/ha, Neem Gold at 5 ml/litre and Neem Gold at 3 ml/litre + T. japonicum at 75 000 eggs/ha on yellow stem borer (YSB; Scirpophaga incertulas) and rice leaf folder (Cnaphalocrocis medinalis) infesting rice (cv. Basmati), and their predators (spiders). Cartap hydrochloride 4 G and imidacloprid 17.8 SL resulted in the lowest incidence of yellow stem borer and leaf folder, but had adverse effects on spider fauna. Bacillus thuringiensis and Beauveria bassiana were the most effective against both pests. The biological pesticides were superior over the synthetic insecticides in conserving the spider population. The release of T. japonicum with botanicals reduced the populations of both pests and conserved the spider population. The cost: benefit ratio was highest with imidacloprid 17.8 SL (1:10.13) and lowest with Bacillus thuringiensis (1:1.90).

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Accession: 022473174

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