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针对B型烟粉虱入侵后的暴发性及生态系统的可侵入性,开展了B型烟粉虱的入侵机制、成灾机理和控制基础研究.结果显示,目前我国至少存在6种生物型(B,Q,ZHJ-1,ZHJ-2,ZHJ-3,FJ-1),其中B型烟粉虱在我国大部分地区、Q型烟粉虱在我国长江流域已成为优势种群,给蔬菜、花卉和棉花生产造成严重危害.寄主植物、地理环境及杀虫剂可诱导B型烟粉虱产生遗传分化,使其种群遗传结构发生快速演变;黄瓜和南瓜可诱导羧酸酯酶(CarE)和谷胱甘肽S-移酶(GSTs)活性升高,增强B型烟粉虱抗药性;植物次生物可诱导B型烟粉虱解毒酶活性升高.B型烟粉虱所具有的较强的高温胁迫适应能力和热激蛋白基因的表达与响应密切相关.B型烟粉虱可取代土著烟粉虱,B型烟粉虱与土著烟粉虱间的非对称交配干扰及其与植物双生病毒间的互利共生加剧了B型烟粉虱的入侵;特定条件下B型烟粉虱可取代温室粉虱,较强的逆境适应能力、较快的种群增长力可能是B型烟粉虱取代温室粉虱的主要机制;较强的对寄主转换的适应能力与B型烟粉虱寄主谱扩张有关.土著天敌对B型烟粉虱具有较强的控制潜能;B型烟粉虱3,4龄若虫及蜜露可诱导丽蚜小蜂产生强烈的搜索行为,若虫利它素在丽蚜小蜂寄主搜索和定位中具有重要作用.研究结果为阐明B型烟粉虱入侵种群在我国的遗传分化与快速演变机制和分子生态适应机制、探明种群形成与扩张过程中生态对策的调整及其效应提供了理论依据,为B型烟粉虱的生物生态控制途径和持续治理策略提供了保障。
According to the outbreak of B-type B. tabaci and its invasiveness to ecosystem, the invasion mechanism, mechanism and control of B. tabaci B-biotype were studied.The results showed that at least 6 biotypes B, Q, ZHJ-1, ZHJ-2, ZHJ-3, FJ-1), of which B.tabaci B was the predominant population in most of China’s Yangtze River valleys, Flowers and cotton produce serious harm.The host plants, geographical environment and insecticides can induce the genetic differentiation of Bemisia tabaci B, so that the genetic structure of the population evolves rapidly; Cucumber and pumpkin can induce carboxylesterase (CarE) and Glutathione S-transferase (GSTs) activity increased, and the resistance to B. tabaci B-biotype was enhanced. The activity of detoxification enzymes of B. tabaci B-biotype induced by plant biotypes was increased. Is closely related to the expression of heat shock protein gene and its response.The B-type B. tabaci can replace the asymmetric mating interference between indigenous B. tabaci and B. tabaci and indigenous B. tabaci and its interaction with plant twins The mutually beneficial symbiosis of viruses exacerbated the invasion of B. tabaci B; under certain conditions, B. tabaci B may replace the greenhouse Lice, strong adaptability to stress, and faster population growth ability may be the main mechanism for Bemisia tabaci to replace Bemisia tabaci; and the stronger adaptability to host transformation is related to the host spectrum expansion of Bemisia tabaci. Aboriginal natural enemies of B. tabaci B-type control has a strong potential; B-type B. tabaci 3 and 4 instar nymphs and nectar can induce aphid wasps to produce a strong search behavior, Search and location.Results In order to clarify the mechanism of genetic differentiation and rapid evolution of B.tabaci B in China and the molecular ecological adaptation mechanism, the adjustment and effect of ecological measures in the process of population formation and expansion The theoretical basis for the B-biotype whitefly bio-ecological control ways and sustainable management strategies to provide a guarantee.