作　　者： ;

机构地区： 中山大学生命科学学院

出　　处： 《中山大学学报（自然科学版）》 1998年第1期83-87,共5页

摘　　要： 根据系统分析方法，建立了柑桔潜叶蛾幼虫、蛹和２种寄生蜂Ｔｅｔｒａｓｔｉｃｈｕｓｐｈｙｌｏｃ－ｎｉｓｔｏｉｄｅｓ、Ｃｉｒｒｏｓｐｉｌｕｓｑｕａｄｒｉｓｔｒｉａｔｕｓ、以及捕食性天敌类群的５维系统模型，模型为连续型微分方程组，并具有时滞及扰动因子．模型依据生命表资料和在广东省四会县的田间调查数据，对柑桔潜叶蛾—天敌系统进行了模拟．模拟结果显示，柑桔潜叶蛾幼虫及蛹的数量在６月和７月份各有１个发生高峰，以７月中旬至８月上旬发生最为严重，捕食性天敌在６月份数量较低，７月以后呈Ｌｏｇｉｓｔｉｃ型增长，寄生蜂的种群发生也呈相应的规律性波动；模型的模拟趋势与田间调查情况基本吻合．对模型的灵敏度检验得知，影响系统的关键因子主要包括系统初值，柑桔潜叶蛾成虫初始数量，天敌（包括寄生蜂）的死亡率、天敌的扰动因子（迁入量）等．在系统模型中，笔者提出了寄生蜂自然死亡率与柑桔潜叶蛾相应虫态的密度成比例相关的假设。 Based on the experimental data from Sihui county, Guangdong Province during 1990-1992, the ecosystem of citrus leaf minernatural enemies was studied by using systematic analysis methods. A set of system models were constructed in this paper, which described interactions among five factors, including larva and pupa of the citrus leaf miner, two kinds of parasites (Tphyllocnistoides, Cquadristriatus) and predators. The system models were continuous differetial equations,with timelag and perturbation factor included. Using the data of the citrus leaf miner's life table and the experimental data, simulations were undertaken. The outcomes showed that the occurrence of both larva and pupa had a peak in June and July separately, the occurrence was especially serious from the middle of July to the first half of August, the number of predators was lower in June and presented increasing in Logistic curve style in next several months; the population dynamics of parasites also revealed fluctuations correspondingly. The system simulations are very much taklly with the data surveied in the field. Key factors affecting the system include initial system values,initial adult number of the citrus leaf miner, death rate of natural enemies and perturbation factor of natural enemies (such as migration, aggregation et al.) .

关 键 词： 柑桔 潜叶蛾 天敌 系统模拟

领　　域： [农业科学] [农业科学]