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萍螟、萍灰螟是红萍的主要害虫、1976年3月10日开始,我们在长沙地区观察了萍螟、萍灰螟各虫态的形态特征、生活习性、生活史以及世代发生情况,并进行了防治试验。现初步总结如下: 一、两螟的形态特征萍螟、萍灰螟一生要经过卵、幼虫、蛹和成虫四个时期。在我省萍螟有褐萍螟和黑萍螟两种,其形态特征、生活习性和为害特点基本相似。雌蛾体长8～9毫米,雄蛾
Ping borer, Ping Ping borer is the main pest Red Ping, March 10, 1976 began, we observed in Changsha area Ping, borer borer morphological characteristics of each insect, life habits, life history and generation situation, And conducted a control test. Preliminary summary is as follows: First, the morphological characteristics of two borers Ping borer, Ping dust borers throughout the eggs, larvae, pupae and adults four periods. In our province Ping borer there are two kinds of brown moth and black moth, its morphological characteristics, habits and damage characteristics are similar. Female moth body length 8 ~ 9 mm, male moth