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本研究运用主分量分析方法对桔始叶螨(Eotetranychus kankitus Ehara)各螨态、天敌以及主要非生物因子进行了分析,寻找出影响桔始叶螨种群数量变动的主导因子。进而在实验室控制条件下,进一步探讨了温度对桔始叶螨各螨态发育速率、死亡率和雌成螨生殖能力的影响;不同生育时期叶片对桔始叶螨雌成螨生殖力的影响;雨量对桔始叶螨生存的影响;天敌对桔始叶螨各螨态的捕食作用;以及种群扩散的研究。基于室内外调查和试验数据,建立了种群亚模型,并改进了前人研究中的一些计算方法,提出将有螨叶数量、生态位重叠系数应用于自然环境中天敌对桔始叶螨捕食的时间、空间关系的描述,在各亚模型的基础上,建立了桔始对螨种群数量动态模型,并改进了厢车模型在变温条件下的应用。
In this study, principal components analysis was used to analyze the mite states, natural enemies and major abiotic factors of Eotetranychus kankitus Ehara, and the main factors influencing the population dynamics of M. litura were found out. Furthermore, the effect of temperature on the developmental rate, mortality and reproductive capacity of mite in each mite state of Tetranychus urticae was further studied under the laboratory control conditions. The effect of different growth stages on the fecundity of adult mites Effects of rainfall on survival of Tetranychus urticae; predation by natural enemies on each mite state of Tetranychus urticae; and population dispersal. Based on indoor and outdoor investigation and experimental data, the sub-model of population was established and some calculation methods in previous studies were improved. It was proposed that the number of mite leaves and niche overlap coefficient should be applied to natural enemies to prey on the spider mite Time and space relationship. On the basis of each sub-model, the dynamic model of the number of mite population was established, and the application of the car model at variable temperature was improved.