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为明确外来入侵害虫B型烟粉虱取食诱导的烟草防御反应对斜纹夜蛾的影响,探讨其与斜纹夜蛾的种间竞争机制,在室内条件下研究了B型烟粉虱取食后的烟草对斜纹夜蛾成虫产卵选择、幼虫取食选择、拒食作用和其他取食行为指标的影响.结果表明:斜纹夜蛾成虫在B型烟粉虱为害后的植株上的落卵量较对照植株降低了40.9%.B型烟粉虱为害的虫体叶对斜纹夜蛾初孵化幼虫具有明显的驱避作用,而中间叶和系统白脉叶有一定的吸引作用,心叶不影响幼虫对寄主的选择性.B型烟粉虱为害叶片对斜纹夜蛾幼虫具有显著的拒食作用,虫体叶拒食作用明显大于系统白脉叶片.与对照相比,B型烟粉虱为害的虫体叶和系统白脉叶降低了斜纹夜蛾幼虫单位时间取食次数或取食比例,虫体叶还显著延长了幼虫开始取食时间,总取食面积显著减少.表明B型烟粉虱为害烟草对斜纹夜蛾成虫产卵和幼虫取食行为均产生不利影响.研究结果对了解烟田害虫种群变动规律和指导害虫治理具有较大意义.
In order to clarify the effects of tobacco defense responses induced by B. albopictus feeding on invasive Spodoptera litura to Spodoptera litura and to explore its interspecific competition mechanism with Spodoptera litura, Of tobacco on the oviposition, selection of larvae, antifeeding and other feeding behaviors of adult Spodoptera litura.The results showed that the larvae of adults of Spodoptera litura were oviposited more than those of the control The control plants decreased by 40.9%. Bemisia tabaci infected by Bemisia tabaci B had significant repellent effects on newly hatched larvae of S. litura, while middle leaves and systemic brouha lobes had a certain attraction, while heart leaves did not affect larvae And the selectivity to the host.The biotypes of B. tabaci B-biotype B. tabaci had a significant antifeeding effect on S. litura larvae and the antifeeding effect of the larvae was significantly greater than that of the system Bai-ve leaf.Compared with the control, Leaf and system baiyeye reduced the number of feeding and feeding rate of S. litura larvae per unit time, and the larvae also significantly prolonged larval feeding time and the total feeding area significantly reduced, indicating that B. tabaci B-infected tobacco Adult production of Spodoptera litura And larval feeding behavior are adversely affected. The results have great significance for understanding the population fluctuation Tobacco pests and pest management guidance.