黄脊竹蝗集中产卵地的识别与测报方法研究

How to Distinguish the Locality for Concentrated Egg Deposition and the Forecasting Method for Ceracris kiangsu

在测定黄脊竹蝗产卵量的基础上，观察黄脊竹蝗的迁飞落脚交尾地、鸟啄卵块留下的痕迹、立竹下方枝盘竹叶被害症状等产卵地的直观识别特征，可快速准确识别黄脊竹蝗集中产卵地。根据黄脊竹蝗造成的立竹下方枝盘竹叶被害程度制定了卵粒密度查定表，可测报集中产卵地卵粒密度和次年跳蝻发生面积、危害程度；根据集中产卵地上跳蝻先喜取食立竹顶梢竹叶造成的危害程度制定了立竹上已有跳蝻密度查定表，可测报跳蝻发生面积与危害程度。

Based on the measurement of the amount of egg deposition of Ceracris kiang-su and observations on its landing locations,traces of eggs left on the ground after predationby birds and the damage symptoms of the branches on the lower part of the culm's tip,it'seasy to guickly and accurately distinguish its concentrated egg deposition localities. Based onthe damage degree of the bamboo leaves,a table for checking egg densities was established,which can be used for forecasting the occurrence and damage degree of this insect in the fol-lowing year.