Trials conducted to assess the resistant reaction of some rice accessions and evaluation of newer molecules against the incidence of two key lepidopterous pests viz., Scirpophaga incertulas Walker and Cnaphalocrocis medinalis Guenee revealed that among the screened varieties, WR-15-6-1, WR-1-9-1-1, CAU-R2, Lamyanbaphou, RC-MANI-PHOU-11, Matamphou, KD-6-18-7-1 and RCMANIPHOU-6-RC-5 reacted moderately susceptible at vegetative stage and among these eight, four varieties viz., WR-1-9-1-1, CAU-R2, RC-MANI-PHOU-11 and Matamphou showed resistant reaction at heading stage against S. incertulas and six accessions viz., WR-1-9-1-1, CAU-R3, KD-5-3-14, RCMANI-PHOU-11, CAU-R4 and KD-6-18-7-1 were categorized as moderately susceptible to C. medinalis. The test on efficacy of newer molecule showed that treatment with Fipronil 5 SC @ 100 ml a.i. ha1 was found to be most effective in reducing Deadheart (DH) and White Ear Head (WEH) with minimum incidence of 3.85 per cent and 1.87% WEH respectively. Whereas the pooled mean data of two spray indicated that Imidacloprid 17.8 SL @ 250 ml a.i. ha1 showed minimum leaf damage of 4.16 % which was at par with Flubendiamide 39.35 SC @ 50 g a.i. ha-1 (4.63% LD), Fipronil 5 SC @ 100 ml a.i. ha-1.
The survey conducted during kharif 2018 and 2019 in rice crop to assess the biodiversity of predators revealed 37 species from 17 families belonging to six insect orders and 13 species of spiders under twelve genera under eight families. Spiders, coccinellids, damselflies and dragonflies were noticed.
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