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通过系统调查分析了深点食螨瓢虫(Stethorus punctillumWeise)、中华草蛉(Chrysopa sinicaTjeder)和塔六点蓟马(Scolothrips takahashii Prisener)这3种截形叶螨(Tetranychus truncatus Ehara)的主要天敌对截形叶螨的控制作用。采用Holling的圆盘方程拟合,经卡方检验法,对截形叶螨的捕食功能进行分析。结果表明,对不同密度和不同螨态下截形叶螨的捕食功能反应分别符合HollingⅡ型。深点食螨瓢虫、中华草蛉和塔六点蓟马成虫对截形叶螨卵和成若螨日最大捕食量分别为42.24粒和36.64头;31.82粒和25.05头;39.17粒和31.40头,这3种天敌成虫对截形叶螨卵的捕食量均大于其成若螨。3种天敌各自在不同情况下对截形叶螨的控制作用,表明其具有重要的保护利用价值。
The main natural enemies of three species of Tetranychus truncatus Ehara, Stethorus punctillumWeise, Chrysopa sinicaTjeder and Scolothrips takahashii Prisener, were systematically investigated. Control of Tetranychus urticae. Holling disk equation fitted by chi-square test, the truncated spider mite predation function analysis. The results showed that the predation functional responses of Tetranychus urticae in different densities and mites were Holling Ⅱ. Depth of food mites ladybugs, the Chinese grass and the tower six o’clock thrips adult Tetranychus Tetranychus oviposition and adult noctua daily maximum appetite were 42.24 and 36.64; 31.82 and 25.05 head; 39.17 and 31.40 head , Predators of these three natural enemies of Tetranychus urticae eggs were greater than their predation if the number of mites. The control effects of the three natural enemies on T. truncatus under different conditions indicated that they had an important value of conservation and utilization.