Silicon improves the structural integrity and plant tolerance against pests, drought and metal toxicities. Cartap hydrochloride 50% SP, a bio-rational insecticide widely used against rice pests. Field experiment was attempted to study the effect of silicon (diatomaceous earth, DE) fertilization and cartap hydrochloride on yield and pest infestation in rice. Lower pest infestation, higher grain and straw yield was found in treatments with � POP (package of practice) + DE @ 600 kg ha-1 and full POP + DE @ 600 kg/ha followed by two applications of cartap hydrochloride @ 500 g a.i./ha at 30 and 60 DAT in each cases respectively. Maximum grain yield of 52.63 and 51.75 q ha-1 was found in the later treatment. Among different levels of silicon imposed, 600 kg DE ha-1 was the best providing maximum grain and straw yield. Prevailing natural enemies were undisturbed as substantiated by percent parasitisation of stem borer eggs by parasitoids Tetrastichus sp., Telenomous sp. and Trichogramma sp. and the larval stage of leaf folder by Bracon sp. and Apanteles sp.

Role of cartap hydrochloride 50% SP (Nerris toxin) and silicon (diatomaceous earth) in reducing pest incidence in rain fed rice eco-system: Greener and sustainable attempt

248th National Meeting (2014)

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