褐稻虱Nilaparvata lugens(Stl)的卵产在水稻叶鞘组织内,不易看见,往往到造成损失才发觉,因此调查卵块是搞好防治的重要手段。现根据个人的体会,提出如下的意见,供参考。 一、调查方法 按不同品种,分别进行如下的统一调查。 第一步、采集样本。按不同品种各取样本250丛,每丛按不同植株层次检查280株,不同节位叶鞘调查1,200片。 第二步、样本处理。将样本上剪取的叶鞘 Oviposition of Nilaparvata lugens (Stl) is not easy to see in the leaf sheath tissues of rice plants, and it is often found that it is caused by loss. Therefore, the investigation of egg lumps is an important means of prevention and control. Now based on personal experience, put forward the following comments for reference. First, the survey method According to different varieties, respectively, the following unified survey. The first step, collecting samples. According to different varieties of 250 samples taken from each plant 280 plants at different plant levels, different sections of leaf sheath investigation 1,200. The second step, sample processing. Leaf sheath cut from sample