论文部分内容阅读
甘蓝夜蛾在台安、昌图、彰武、黑山及建平等县甜菜栽培已普遍发生和为害。其幼虫取食甜菜叶片,大发生时,甜菜叶片吃光后,继续食害根头,致使甜菜块根减产15～20％,含糖量降低0.8～1.0度,受害的块根在秋季起收后,容易在贮藏期造成腐烂。因此防治甘蓝夜蛾幼虫为害是保证甜菜质量和数量的关键。 防治甘蓝夜蛾,须经常深入田间检查虫情。甘蓝夜蛾成虫卵产在甜菜叶背面,虫卵集中呈瓦片状排列,待田间卵块有90％以上孵化,成虫腹部不再继续抱卵时,开始喷药防治。 药剂防治有喷雾和喷粉两种方
Beet armyworm in Tai’an, Changtu, Zhangwu, Montenegro and Jianping beet cultivation has been common and harmful. Its larvae feed on beet leaves, large occurs, the beet leaves eaten, continue to eat the root, resulting in beet root yield 15 to 20%, reducing the amount of sugar 0.8 to 1.0 degrees, the affected roots in the fall from the harvest, easy Cause decay during storage. Therefore, the prevention and control of cabbage budworm larvae damage is to ensure the quality and quantity of sugar beet. Prevention and control of cabbage Lantern moths, often in-depth examination of pests. Beet armyworm adult eggs in the back of the beet leaf, egg-shaped tile was arranged in order to be field eggs more than 90% hatch, adult abdomen no longer continue to hold the egg, began spraying prevention and treatment. Pharmacy control spray and dusting two parties