在开展利用线虫来控制害虫的研究工作中,科技工作者往往对害虫各虫态线虫寄生率的计算水准不明确,造成一些概念模糊。笔者在近年实践中,觉得有必要对害虫的线虫寄生率提出一个统一的计算指标,供参考。 索线虫寄生昆虫体内,使宿主产生一系列病变,最后导致宿主死亡。尤其是雌性宿主,早期感染线虫后,生殖腺发育不全(卵巢基本不怀卵),失去生殖能力,上一代雌性褐稻虱被线虫寄生率高的田块,下一代虫量就会得到控制。因此,衡量害虫线虫寄生率的高 In carrying out research on the use of nematodes to control pests, scientists often have unclear levels of calculation of the parasitic rates of nematodes in their respective pests and some of the concepts are ambiguous. In recent years, the author thinks it is necessary to put forward a unified calculation index for pest nematode parasitism for reference. Nematodes parasitic insects in the body, the host produces a series of lesions, eventually leading to death of the host. Especially female host, the early infection of nematodes, gonadal hypoplasia (the ovary basically do not have eggs), loss of reproductive capacity, the previous generation of female brown planthopper nematode parasitic rate of the plots, the next generation of insect population will be controlled. Therefore, the measure of pest nematode parasitism high