摘要
灰飞虱Laodelphaxstriatellus(Fallen)卵、若虫、成虫(产卵前期)的发育起点温度分别为10.9488℃、1.1709℃、9.4434℃ ,有效积温(日度)分别为120.0635、437.2261、76.5710 ,灰飞虱以3龄、4龄若虫越冬 ,平均过冷却点分别为 -7.22℃和 -7.8℃。雌成虫产卵大多处于水稻中下部的叶鞘内 ,卵有很强的耐浸水能力 。
The developmental zero of egg,nymphs and adults of Lacdephax striastellus (Fallen) are 10.9488℃,11.1709℃,9.4434℃respectively.The effective accumulative temperature are 120.0635,437.2261,76.5710 respectively.The nymphs of 3and 4 stadia can hibernate,their average supercooling temperature are -7.22℃and -7.8℃.Most eggs were layed in the middle and lower part of rice.The eggs have great of standing water.And the temperature can effect the number of eggdeposited.
基金
上海市高校科技以发展项目!(97 -EJ01)
关键词
灰飞虱
发育起点温度
有效积温
过冷却点
Laodeihax striatellus
developmental threshold temperature
effectiveaccumulative temperature
supercooling temperature
