论文部分内容阅读
稻杆潜蝇 Chlorops oryzae(Matsumura)又名稻杆蝇。以前在我区很少发生,至70年代末,由于杂交稻的推广,冬种面积的扩大,发生量逐年上升,为害逐年加重。已上升为丘陵山区水稻上的主要害虫。我县1980年以来,杂交中稻秧苗被害株率常在40%左右,严重的达80%以上,后期被害穗率达22%左右。从1982年起开始向低山区发展。丘坪区早稻秧苗被害率常达3%左右,高达9.5%;晚稻秧苗被害株率达2.5%左右,后期被害穗率达1%左右。
Chlorops oryzae (Matsumura), also known as rice stem flies. In the past, seldom occurred in our district. By the late 1970s, due to the popularization of hybrid rice and the expansion of winter area, the occurrence increased year by year, and the harm increased year by year. Has risen to the main pests on rice in the hilly mountains. Since 1980, the incidence rate of hybrid rice seedlings in commonly used hybrid rice has been around 40%, reaching over 80% in severe cases and about 22% in the late stage. From 1982 onwards to low mountain development. The damage rate of early rice seedlings in Qiu-Ping District is about 3%, up to 9.5%. The rate of damaged rice plants in late-season rice seedlings is about 2.5%, and the rate of ear damage is about 1%.