论文部分内容阅读
韭菜根蛆属昆虫双翅目尖眼蕈蚊科,一年发生4代,主要以幼虫在春秋两季危害韭菜的叶鞘、幼茎和幼芽,受害后植株叶片发黄,并引发腐烂;夏季向下活动,钻蛀入鳞茎,危害严重时可导致鳞茎腐烂,继而造成整蔸韭菜死亡。从近年韭菜根蛆在陕西周至县的发生为害来看,主要以第一代和第四代幼虫为害最大,该虫发生较重的年份初春和9月,雨水较多,田间湿度较大,一般3年以上的韭菜田发生较重,而1～2年的田块发生较轻。
Leek root maggots belong to the genus Diptera head sharp mushroom Division, occurs four generations a year, mainly in spring and autumn, the larvae of leaf sheaths, young stems and young shoots harmful to leek, plant leaves yellow, and trigger decay; summer Down the activity, drilling moth into the bulb, serious damage can lead to bulb decay, and then cause the whole chive death. In recent years, chives root maggots in Zhouzhi County, Shaanxi Province, the incidence of harm, mainly to the first and fourth generation larvae most affected, the pest heavier years early spring and September, more rain, the field humidity, the general More than 3 years of leek field occurred heavier, and 1 to 2 years of plots occurred lighter.