摘要
在四川,栗穗螟Mampava bipuntella Ragonot的寄主为高粱和玉米。年发生1～3代。以幼虫随寄主收获转移到房屋墙壁和用具缝穴内越冬。成虫主要选择抽穗至灌浆期高粱穗、抽雄散粉期玉米雄花产卵。雌虫平均产卵量50粒左右。初孵幼虫可取食扬花至蜡熟期的高粱,食量因生育期不同为18～27粒。第一代部分幼虫和第二代大部分幼虫滞育。温、湿度对成虫期和幼虫初孵期影响较大,高温低温成虫生活力衰退,初孵幼虫死亡率增加。寄主植物种类和生育期对幼虫发育速度、存活率、滞育率、蛹重和成虫生殖力有明显影响;寄主适宜成虫产卵生育期与成虫发生期遇合的时间长短是种群数量变动的主要因素。
Foxtail millet webworm, a pest in sorghum or corn, could develop one or three generations in Sichuan. It hibernated by larva in the slits of wall, house or furniture. The adults preferred to lay eggs on sorghum in the stage from heading to milking, or On the male flowers of corn. The average number of eggs laid by per female was 50. The newly hatched larva could feed on grains of sorghum from the stage of florescence to that of wax ripeness. The average feeding ability of a larva was 18-27 grains but varied with the stages of sorghum. Some larvae of the first generation and most of the second generation were diapause. High temperature and low humidity could reduce the percentage of hatching and the activity of larvae. The species and the growing stages of the host had a great effect on the development, survival rate, diapause rate of larvae, the weight of pupae and the fecundity of adults. The length of coincidence between the growing stage of the host plant suitable to oviposition for adult females and the occurrence stage of adults was the most important factor to affect the population dynamics.
出处
《西南农业学报》
CSCD
1989年第3期72-77,共6页
Southwest China Journal of Agricultural Sciences
关键词
高粱
栗穗螟
害虫
生物学
生态学
Sorghum
Foxtail millet webworm (Mampava bipunctella Ragonot)
Biological character
Ecological character
Sichuan
