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为探究B型烟粉虱Bemisia tabaci(Gennadius)成虫对寄主植物多样性的适应性,采用生态测定和生化方法,比较了油菜、棉花、番茄、黄瓜4种寄主植物同时存在与单种寄主植物存在时对B型烟粉虱存活率、产卵量、总蛋白、海藻糖、超氧化物歧化酶(superoxide dismutases,SOD)、碱性磷酸酶(alkaline phosphatase,AKP)、海藻糖酶、蔗糖酶、淀粉酶等指标的影响。同时,利用“Y”型嗅觉仪,测定了B型烟粉虱雌成虫对4种寄主混合共存和单独存在时的行为反应。结果表明,与单种寄主植物相比,4种寄主植物混合共存时,烟粉虱9 d时存活率显著降低,为(64.0±3.8)%,总产卵量为907±52.5粒,大于棉花,小于油菜、黄瓜,与番茄无显著差异;海藻糖含量及SOD、AKP、海藻糖酶、蔗糖酶、淀粉酶活性相对增大;行为研究表明4种寄主植物混合共存与单种植物存在时相比,除油菜外,B型烟粉虱雌虫对单种植物选择趋性较强。
In order to investigate the adaptability of Bemisia tabaci (Gennadius) adults to the diversity of host plants, ecotypes and biochemical methods were used to compare the coexistence of four host plants, ie, rape, cotton, tomato and cucumber, with the single host plant The results showed that the survival rate, egg production, total protein, trehalose, superoxide dismutases (SOD), alkaline phosphatase (AKP), trehalase, Amylase and other indicators of the impact. At the same time, the behavioral responses of female adults of B. tabaci B-biotype to the coexistence of four host species and their presence alone were determined using a “Y” -type olfactometer. The results showed that the survival rate of Bemisia tabaci on the 9th day was significantly lower (64.0 ± 3.8%) and the total fecundity was 907 ± 52.5 than that of the single host plant, , Less than that of rapeseed, cucumber and tomato. The content of trehalose and the activities of SOD, AKP, trehalase, invertase and amylase were relatively increased. The behavioral studies showed that the coexistence of four host plants and the presence of single species In addition to rapeseed, the female Bemisia tabaci B had a stronger tendency to choose a single plant.