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利用赤眼蜂防治松毛虫,是当前生物防治中的主要方法之一。但是,近年来有些地区防效不稳定,甚至效果不佳,防治面积有所缩减。上述问题发生的原因,主要是蜂种选择、繁蜂工艺和放蜂方法没有掌握好。7～8月间是放蜂季节,今年放蜂时应抓什么呢?1.选择放蜂地段:高山远山地区,用其它办法防治难度较大的地段;有虫株率不超过50％,平均单株虫口15头以下的林分。春季经过化防、菌防的地段,也可用赤眼蜂控制剩余虫口。
The use of Trichogramma to control pine caterpillars is one of the main methods in biological control. However, in some areas, the effect of prevention and control has been unstable and even ineffective, and the area of prevention and control has been reduced. The reasons for the above problems, mainly bee selection, bumble bee process and put the bee method is not good. 7 ~ August is the release of the bee season, what should be caught this year when putting the bee? 1. Select the bee location: mountains and mountains, using other methods to control the more difficult areas; the worm strain rate does not exceed 50% The average number of individual insect population below 15 points of the forest. After the spring of fortification, bacteria prevention of the lotus, Trichogramma can also be used to control the remaining insect population.