Evaluation of Integrated Pest Management (Ipm) Modules Against Yellow Stem Borer, Scirpophaga Incertulas (Walker) and Leaf Folder, Cnaphalocrocis Medinalis (Guenee) in Basmati Rice in Western Plain Zone of Uttar Pradesh

Abstract

An experiment entitled “Evaluation of integrated pest management modules against yellow stem borer, Scirpophaga incertulas (Walker) and leaf folder, Cnaphalocrocis medinalis (Guenee) of rice in western plain zone of Uttar Pradesh” was carried out during 2017 and 2018 at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut-250110 (U.P.) in a randomized block design with three replications and seven modules. During the crop season, 12 insect species encountered on basmati rice at different crop growth stages. Yellow stem borer and leaf folder were recorded as major pests. The brown plant hopper, rice gundhi bug, white grub and termite were found to damage the crop moderately. The other insect pests recorded on the crop were of less importance and extent of their damage was found without much economic loss. Among natural enemies Pheropsophus sp. Ophio neaindica (Thunberg), Coccinella transversalis (Fabricus), Cheilomenes sexmaculata (Fabricus), Cicindelas exguttata (Fabricius), Paederus fuscipes(Curtis), Cyrtorhinus lividipennis(Reuter), Cerigrion sp., Ischnura aurora (Brauer), Ischnojoppaluteator (Fabricius), Xanthopimpla punctata(Fabricius), Charops bicolor (Szepligeti), Stenobracon nicevillei (Bingham), Apanteles sp. and Lycosa pseudoannulata (Boesenberg & Strand) were recorded in the rice agro-ecosystem. The infestation of yellow stem borer started from second week of August and reached its peak during first week of September. The leaf folder infestation started in second week of August and reached its peak during last week of September during Kharif, 2017 and 2018, respectively. The avoidable loss was recorded 47.55 and 44.10 percent during Kharif, 2017 and 2018, respectively. The efficacy of different IPM modules evaluated against S. incertulas and C. medinalis, the Module 5 ( one spray of cartap hydrochloride 50 SP @ 600 gm/ha at 30 DAT + one spray of fipronil 5 SC @ 1 litre /ha at 45 DAT + one spray of lambda- cyhalothrin 2.5 EC @ 500 ml/ha at 60 DAT) was performed best among all modules followed by Module-2 (application of neem oil 0.03% @ 3000 ml/ha at 30 DAT + one spray of cartap hydrochloride 50 SP @ 600 gm/ha at 45 DAT + one spray of lambda- cyhalothrin 2.5 EC @ 500 ml/ha at 60 DAT). The highest grain yield (37.60 and 38.50 q/ha during Kharif 2017 and 2018, respectively) and highest cost benefit ratio (1: 10.75) were also obtained from Module 5. Module 1 (release of parasitoid Trichogramma japonicum @ 1,00,000/ ha at 30 DAT + release of parasitoid Trichogramma chilonis @ 1,00,000/ ha at 45 DAT + one spray of B.t. @ 1 kg/ha at 60 DAT) was recorded less effective.