摘要
玉米铁甲虫在广西一年可发生一至二代。主要发生为害世代为第一代,并主要以第一代成虫越冬,成为次年发生的重要虫源。越冬成虫每雌产卵量163粒,第一代成虫321粒。第一代卵盛产期为4月上旬至5月中旬。可在玉米,罗氏草和两耳草上完成全部生活史。冬期成虫:性比为1.0256:1,冬后为1.124:1。越冬成虫耐饥力强,致死中期为34～47.4天。幼虫四龄,三龄期进入暴食阶段,每头幼虫平均取食玉米叶面积为10.45±1.06cm^2。
The corn beetle [Dactylispa setifera (Chapuis)] has one or two generations Per year in Guangxi, and the first generation is the most injurious. The overwintering morph is the adult of first generation and which is the source of next year. The mean of eggs laid by each female adult of the overwintering generation is 163,that of the first generation is 321. The aboundance period of oviposition lasted 35 to 42 days. In the middle winter, The sex ratio was : =1.0256 : 1; and the last winter, =1.124 : 1. The larval Period included four instars, and its feeding amount reched to a great level in the third and 4th instar. A larva damaged an area of cornleaf by 10.45 = ±1.06cm2.
出处
《西南农业学报》
CSCD
1990年第2期63-67,共5页
Southwest China Journal of Agricultural Sciences
关键词
玉米铁甲虫
铁甲虫
生物学特性
Zea mays L., Corn beetle [Dactylispa setifera (Chapais)] , Biological character Life cycle, Guangxi
