Pest succession of rice stink bug, Euschistus sp. and Oebalus spp. in different rice ecosystems

Abstract

The present study was conducted at research farm of College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur during Kharif season under different rice ecosystems. The results of field experiments revealed that among the ecosystem the pest first appeared (34 SMW) in Low land conventional rice ecosystem (LLC) with 1.0 nymph/adult/25 sweeps and the maximum population of rice stink bug observed on 43 SMW in month of October with 28.75 nymph/adult/25 sweeps in Midland system of rice intensification (MSR). The pest was first disappeared in upland ecosystem while pest was remaining up to harvest in Lowland organic rice ecosystem (LLO). Among the ecosystem the seasonal mean population of bug was highest in Midland normal transplanted rice ecosystem (MNT) with 6.13 nymph/adult/25 sweeps during the rice cropping season.