稻飞虱预测中应注意具体分析的几个问题

根据稻飞虱的生活习性和发生规律 ,在做预报时 ,对下列几个问题应进行具体分析。①灯诱问题 :不能把全年灯下诱得的虫量都称为迁入虫源 ,灯诱常受到风、雨等天气的影响 ,必须注重田间调查。②迁入长翅型成虫的有效率问题 :长翅型成虫迁入时如遇适宜食料等适生环境 ,则有利其繁育滋生 ,如迁入期太早或太迟 ,遇不到适生环境 ,则不利其繁育滋生。③种群问题 :白背飞虱与褐飞虱的越冬、寄主、迁飞规律、历期、繁殖力、田间分布、为害特点等有其明显的差异

PAY ATTENTION TO SOME ASPECTS IN RICE PLANTHOPPER FORECAST

Based on the habit and the occurrence fluctuations of rice planthopper, some aspects should be analyzed in rice planthopper forecast. The first is the induction of light trapping. Only part of the rice planthopper of whole year induced by light trapping could be included into immigration rice planthopper population. The effect of the light trapping was affected by weather, such as wind, rain etc., so emphasises should be put on field investigation. The second is the adaptation of immigrated longwing adults. If long wing adults immigrated in a suitable environment, they will reproduced rapidly, otherwise, the reproductive rate was slow. The third is the compostition of population. Especially rates of white back rice planthopper and rice planthopper, the characteristics such as overwinter, host plant, migration regulation, period of migration, reproduction, field distribution and damage to the rice were great different.