大螟是危害早稻的害虫之一,长期以来在水稻上的发生与危害都比较次要,但近些年来随着耕作制度的变化,以及农业机械水平的不断提高,原本处于次要地位的早稻大螟危害,在不少地方已有加重发生的趋势,造成早稻后期出现大量白穗,值得引起注意。大螟加重危害的原因大螟是多食性害虫,除危害水稻外,还危害玉米、甘蔗、高梁、小麦、大麦、油菜、蚕豆、茭白、向日葵和棉花等作物,以及稗、芦苇、早熟禾等多种杂草。它对水 Sesamia inferens are one of the pests that endanger the early rice. For a long time, the occurrence and harm of rice stems are more important. However, with the change of farming system and the continuous improvement of agricultural machinery in recent years, Stem borer damage, in many places have been aggravating the trend, resulting in a large number of early white rice spike, deserve attention. Sesamia inferens aggravate the hazards of Sesamia inferens are multi-pest insects, in addition to damaging rice, but also endanger corn, sugar cane, sorghum, wheat, barley, canola, broad beans, wild rice, sunflowers and cotton crops, as well as barnyard grass, reed, bluegrass A variety of weeds. It’s water