Field evaluation of different modules against yellow stem borer Scirpophaga incertulas and its effect on natural enemies in rice

Abstract

Field evaluation of different modules against yellow stem borer, Scirpophaga incertulas and effects on natural enemies in rice ecosystem during kharif and rabi seasons with five modules namely chemical module, bio intensive module, neem based module, integrated module and farmers practice module evaluated revealed that the chemical module had significantly less stem borer damage 2.36 per cent followed by bio intensive module 3.56 per cent and found to be superior than the farmers practice module (8.95 %) in kharif season. The per cent damage was low in the treatment with a chemical module (3.25 %) followed by integrated module (4.61 %) and found to be superior to the farmers practice module (8.84 %) in rabi season. The overall mean population of spiders ranged from 0.14 to 0.25/hill and there was no significant difference among the treatments in both the field experiments and the highest population was observed in farmers practice module. The integrated module recorded a maximum yield of 5513 and 5563 kg/ha while the farmers practice module recorded the lower yield of 3200 and 3063 kg/ha in the khariff and rabi respectively.