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大螟在我省一年发生四代,主要为害水稻、玉米、高梁、甘蔗等作物,过去发生较轻。近年来随着杂交稻的大力推广,玉米、甘蔗的大力发展,大螟发生为害呈上升趋势,个别地方发生为害较重。据1980年9月在莲花县坪里乡调查个别田块大螟为害率达5.6%,据1987年9月在永修县江上乡调查个别稻田为害率达4.7%。因此,掌握大螟在水稻上的产卵习性和分布规律,为大螟的测
Sesamia in the province for four generations a year, the main damage to rice, corn, sorghum, sugarcane and other crops, occurred in the past lighter. In recent years, with the vigorous promotion of hybrid rice, the vigorous development of corn, sugar cane, the occurrence of Stem Borer is on the rise, serious damage occurs in some places. According to the survey in September 1980 in Pingliang Township, Lianhua County, the incidence rate of pest mites in individual plots was 5.6%. According to the investigation in September 1987 in Jiangshang Township, Yongxiu County, the damage rate of individual paddy fields was 4.7%. Therefore, to master the spawning habits and distribution of Sesamia in rice, for the test of Sesamia inferens