Influence of sowing dates and insecticides on the rice stem borer (Chilo agamamnon Bles) and rice leafminer (Hydrellia griseola Fallen)

Present study was aimed to investigate the effect of sowing dates and some insecticides on reducing the infestation of rice leafminer (Hyderllia griseola Fallen) and stem borer (Chilo agamamnon Bles). Sowing date has affected the rice plant infestation, the percentage of leafminer damage, and dead hearts and white heads were significantly increased in June cultivation, but the yield increased in May planting. All insecticides caused a decrease in plant infestation by both insects, also, the combination between carbofuran and other insecticides gave satisfactory control of rice insects. Carbofuran followed by lambda-cyhalothrin caused the highest reduction in infestation and gave the highest rice yield, then carbofuran followed by chlorpyrifos during both sowing dates. This showed that early sown crop yielded higher with the lower infestation. Early planting gave better protection against leaf minor and rice stem borer.