论文部分内容阅读
近年来，随着农业结构的调整，有效“桥梁”虫源田的增加、气候条件的有利，致使三化螟发生量逐年加大，程度逐年加重。特别是今年２、３代在我县部分乡镇的早稻上造成了白穗，双晚稻上出现大面积枯心苗。４代在我县的发生是超常规的一个大发生年。三化螟实际发生程度为：...
In recent years, with the adjustment of agricultural structure, the increase of the effective “bridge” insect source field and the favorable climatic conditions have caused the occurrence of the yellow rice borer to increase year by year, increasing year by year. In particular, 2,3 generations of this year in some counties in our county caused the early rice Baizui, double late rice appeared on a large area of dry seedlings. Generation 4 in my county is a very large annual occurrence of unconventional. Borer actual occurrence degree: ...