论文部分内容阅读
通过人工饲养获得不同虫龄幼虫,利用体视显微镜系统观察、检测各龄幼虫的细微结构特征及生活习性。研究发现:①二点委夜蛾幼虫期蜕皮5次共6龄,1～3龄幼虫形态特征有别。②幼虫食性杂,可以取食超过13个科30种植物。③幼虫惧光,对高温敏感,昼伏夜出,有转株为害习性。④夏季二点委夜蛾暴发期与夏玉米幼苗期相遇,可造成夏玉米严重受害。
The larvae of different instar larvae were obtained by artificial feeding. The microscopic structure and life habits of larvae were observed by stereomicroscope. The results showed that: (1) The larvae of B. exigua had 5 times of total molting for 6 times, and the morphological characteristics of 1st to 3rd instar larvae were different. ② larvae eating complex, you can eat more than 13 families 30 kinds of plants. ③ larvae fear light, sensitive to heat, nocturnal emission, a strain of habit transfer habits. ④ two months of summer outbreak of Helicoverpa armigera and summer corn seedling encounter, can cause serious damage to summer maize.