论文部分内容阅读
本文应用二次回归旋转组合实验设计统计方法,对桔园内主要天敌食螨瓢虫(Stethorus che-ngi)、长须螨(Agistemus exsertus citri)、尼氏钝绥螨(Amblyseius nichols)和普通钝绥螨(Amb-lyseius vulgaris)对桔全爪螨(Panongchus citri)的控制作用,以及天敌与天敌之间、天敌与害螨之间的相互作用进行了研究。得出了这4种天敌对桔全爪螨的捕食量模型。并对模型进行主效分析,表明桔全爪螨自身密度的大小对天敌的总捕食量影响最大。在这4种天敌中对总的捕食量影响最大的是食螨瓢虫,其次为长须螨,尼氏钝绥螨再次之,普通钝绥螨的影响最小。对各天敌间交互作用的分析表明,天敌个体大、活动能力强、捕食量大,他们的种内种间干扰程度也大,特别是食螨瓢虫种内种间干扰十分明显。其次为长须螨,而尼氏钝绥螨和普通钝绥螨的种内种间干扰较弱,在密度较低时,他们还表现出相互促进的作用。最后本文还讨论了这4种天敌能有效地控制桔全爪螨的最大密度,以及在该密度下各种天敌密度的最佳组合。
In this paper, quadratic regression rotation combined experimental design of statistical methods, the main natural enemies of citrus orchards in the food mites Ladybug (Stethorus che-ngi), long-winged mite (Agistemus exsertus citri), Amblyseius Amblyseius nichols and general obtuse The control effect of Amb-lyseius vulgaris on Panongchus citri and the interaction between natural enemies and natural enemies, natural enemies and pest mites were studied. The predation models of these four natural enemies against Panonychus citri were studied. And the main effect of the model analysis showed that the size of its own density of natural enemies of the total predation of predators have the greatest impact. Among the four natural enemies, the most influential factor on the total predation was the ladybird mite, followed by the long-eyed mite and the niche of the Nyneese’s Amblyseius spp. The analysis of the interaction between the natural enemies showed that natural enemies are large in size, highly mobile and predatory, and their interspecific interference is also large. Species interference especially in species of ladybugs is very obvious. Followed by C. longiflorus, while interspecific interspecific interference between A. niger and A. australis was weak, and at low density they also showed a mutual promotion effect. Finally, this paper also discussed the four kinds of natural enemies can effectively control the maximum density of Panonychus citrinopileatus, as well as the density of various natural enemies of the best combination of densities.