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落叶松绶尺蠖的天敌共有22种.其中寄生性天敌16种;捕食性天敌4种;病原微生物2种。寄生性天敌在落叶松绶尺蠖的低密度区内的寄生率为5.0%;在中密度区内的寄生率为16.7%;在高密度区内的寄生率为21.0%。蚂蚁的捕食率为3.0%。由核型多角体病毒导致的死亡率在59.0%~75.0%,白僵菌引起的死亡率在30.0%左右。由于这些天敌的综合调控作用使落叶松绶尺蠖种群密度下降到经济允许水平以下,但是,寄生性天敌昆虫作用缓慢,常常在落叶松绶尺蠖的中或低密度区内发挥作用,仅在一定水平上抑制害虫,当落叶松绶尺蠖的种群数量超过寄生性昆虫的调节能力时,主要是核型多角体病毒使该害虫的种群数量降低到经济允许水平以下.从而控制了该害虫的猖獗危害。
There are 22 natural enemies of larch shrubs. Among them, there are 16 kinds of parasitic natural enemies, 4 kinds of predatory natural enemies and 2 kinds of pathogenic microorganisms. Parasitic natural enemies had a parasitism rate of 5.0% in the low density area of Larix sibirica, a parasitic rate of 16.7% in the middle density area and a parasitic rate of 21.0% in the high density area. The predation rate of ants is 3.0%. The mortality rate caused by nuclear polyhedrosis virus was 59.0% ~ 75.0%, and the mortality caused by Beauveria bassiana was about 30.0%. Due to the integrated regulation of these natural enemies, the population density of Larix gmelinii was reduced below the economic allowable level. However, the parasitic natural enemy insects had a slow action and often played a role in the middle or low density zone of Larix sibiricum. Only at a certain level On the suppression of pests, when Larix sylvatica population exceeds the regulatory capacity of parasitic insects, the main nuclear polyhedrosis virus to the pest population reduced to below the economic level. Thus controlling the pest’s rampant harm.