论文部分内容阅读
美洲斑潜蝇１９９７年８月在我市发生范围已遍及全市１１个乡（镇）。该虫除为害蔬菜、瓜类、棉花外，还为害花卉和杂草。据测定受害蔬菜轻者减产１０％～２０％，重者减产５０％以上，甚至可造成绝收，棉花重发田减产籽棉１２．９％、皮棉９．３％。因此，从１９９８年开始，?
Liriomyza sativae in August 1997 in the city has occurred in the scope of the city’s 11 townships (towns). In addition to harmful insects pest vegetables, melons, cotton, but also damage flowers and weeds. According to the survey, the light vegetables reduced by 10% ~ 20% and the heavy ones by 50% or more, which could even result in the bad harvest. The cotton replanting field reduced the output of seed cotton by 12.9% and lint by 9.3%. Therefore, since 1998,?