褐稻虱是上海地区水稻的主要害虫之一。6月底迁入郊区的褐稻虱到7月份就繁殖第二代,但数量少,一般不为害早稻。9月中下旬繁殖到第四代时就会对水稻造成严重危害,大发生年份往往引起晚稻、后季稻成片枯死。为了探讨主要为害代大发生的原因,弄清褐稻虱繁殖与蜕皮的关系,为预测和防治提供依据,我们于1977～1978年,结合田间调查,进行了温度与系统饲养第三代褐稻虱的试验,现将初步结果整理如下。一、观察方法在避虫条件下,培育无虫无卵的盆栽水稻作饲料,用尼龙纱罩,罩在盆栽水稻上,放入褐稻虱雌虫产卵。观察有效产卵雌虫率;温 Brown planthopper is one of the major pests in rice in Shanghai. The brown planthopper that moved into the suburbs at the end of June will breed the second generation in July, but the quantity will be small, which will not harm the early rice in general. In late September, when the fourth generation is multiplied, it will cause serious damage to rice. The year of large occurrence often causes the late rice and the late rice to become dead. In order to explore the causes of major damage on behalf of large, clarify the relationship between brown planthopper reproduction and molting, to provide a basis for the prediction and prevention, we in 1977 ~ 1978, combined with field surveys, the temperature and the system of third generation brown rice Lice test, the preliminary results are now sorted as follows. First, the observation method Insect-free conditions, the cultivation of insect-free potted rice as feed, with nylon yarn cover, cover the potted rice, into the brown planthopper eggs. Observe the effective fecundity rate; temperature