论文部分内容阅读
甘蔗棉蚜的成虫、若虫在蔗叶的背面主脉两侧群集吸食叶液,破坏叶组织。绵蚜排出的粪便在高温多湿的条件下,导致姻霉病的发虫,影响蔗株的光合作用,植株生长萎缩,产量降低,质量变坏。据省甘科所一九六四年的调查,因绵蚜虫的为害产量下降13.7％—24.6％,最严重的达67％,糖分下降10—40％。绵蚜为害影响当年的产量和糖的质量,而且还影响第二年宿根蔗芽的萌发率。据省甘科所调查,受过绵蚜为害的前造蔗株所遗下的蔗桩,萌发率仅达10—25％,75—90％不能萌发。蔗茎蔗稍作种,萌芽率也很低,甚至不萌发。
The adults and nymphs of the sugarcane aphids swallowed leaf foliage on both sides of the main veins on the back of sugarcane leaves, destroying the leaf tissue. The excrement excreted by the cotton aphid can cause germ-bearing disease, which affects the photosynthesis of the sugarcane plant, shrinks the plant growth, decreases the yield and deteriorates the quality under the conditions of high temperature and humidity. According to the survey conducted by the Gannan Prefecture in 1964, the yield of cotton aphids fell by 13.7% -24.6%, the worst being 67% and the sugar by 10-40%. Cotton aphid damage affect the current year’s yield and quality of sugar, but also affect the second year of perennial sugarcane germination rate. According to the investigation of the provincial Gan Branch, the cane pile left by the former made cane plants damaged by cotton aphid has a germination rate of only 10-25% and 75-90% can not germinate. Cane sugar cane slightly for planting, the rate of germination is very low, not even germination.