Evaluation of Bio-intensive and Chemical Intensive Modules for Management of Major Insect-pests and Diseases in Groundnut

Abstract

Groundnut (Arachis hypogaea L.) is an annual legume crop. The groundnut cultivation is often subjected to significant yield losses due to biotic and abiotic stresses which are the major limiting factors for attaining high productivity. In recent years, insect pest and disease management of groundnut through bio-intensive and chemical intensive means has gained prominence. A study was conducted for the evaluation of bio-intensive and chemical intensive modules for management of insect pests and diseases of groundnut. Among two modules evaluated, the chemical intensive module i.e.  seed treatment with Carbendazim 50 % + Mancozeb 25 % WS @ 2 g/kg seed + Need based foliar spray of Imidacloprid 17.8 SL @ 150 ml/ha at 20-30 Days After Sowing (DAS) + Need based foliar spray of Rynaxypyr 20% EC @ 150 ml/ha for defoliator at 40 and 60 DAS + Need based foliar spray of Tebuconazole 25.9 EC @ 1.0 ml/l 50-70 DAS showed significantly highest germination (80.00%), significantly lowest collar rot incidence (5.49%), stem rot incidence at 90 DAS (4.92%) , lowest PDI of LLS at harvest (36.12%), lowest foliage damage by Jassids at 90 DAS (7.89%), lowest foliage damage by Spodoptera at 90 DAS (13.52%), highest pod yield 186.03 gm / m2, and highest haulm yield 275.53 gm / m2. as compared to bio-intensive module.