Control of insect pests on rice crop using tillage practices.

摘要

Fine rice varieties are severely attacked by insect pests such as the stem borer, Tryporyza Scirpophaga and Sesamia species in Pakistan. Rice stubble, if not properly destroyed after harvesting, acts as the main host for the hibernation of stem borer larvae during winter. The effect of various tillage practices on the destruction of stubble and hibernating rice stem borer larvae was assessed. The effect of no-tillage, for wheat production after rice cropping, on stem borer infestation was also evaluated. Stubble intensity and infestation was highest in untilled fields. Rotovation caused the complete destruction of stubble and left no hibernating larvae. The cultivator and plank with fewer passes was not so effective for stubble destruction or killing stem borer larvae, although the effectiveness increased with the number of cultivator and plank passes.