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螺旋粉虱产卵分泌物所圈定的叶片范围可阻碍一些植食性昆虫如香蕉网蝽的取食。本文采用叶碟法测定了螺旋粉虱产卵分泌物中的芳香酯类、酚类和烷烃类物质对香蕉网蝽5龄若虫的拒食活性。结果表明:在10mg·mL-1质量浓度下,邻苯二甲酸二丁酯表现出较强的拒食活性,其次为3,5-二(1,1-二甲基乙基)-4-羟基苯丙酸甲酯、邻苯二甲酸正辛酯和正十六烷,4,4’-亚甲基双(2,6-二叔丁基苯酚)则没有拒食活性;浓度梯度试验显示,邻苯二甲酸二丁酯对香蕉网蝽若虫的拒食活性随浓度增大而增强,拒食中浓度为0.929mg·mL-1;表明螺旋粉虱产卵分泌物中的芳香酯对一些植食性昆虫有很强的拒食活性,同时为植食性昆虫种间竞争关系提供了理论依据。
The range of the leaves defined by spawning secretions of B. tabaci can hinder the feeding of some herbivorous insects such as banana nematodes. In this paper, the antifeedant activity of aromatic esters, phenols and alkanes in spawning secretions of the B. tabaci on the 5th instar nymphs of the banana Tetranychus spp. The results showed that dibutyl phthalate showed a strong antifeedant activity at the concentration of 10 mg · mL-1, followed by 3,5-bis (1,1-dimethylethyl) -4-hydroxy N-octyl phthalate and n-hexadecane, 4,4’-methylenebis (2,6-di-tert-butylphenol) did not have antifeedant activity. Concentration gradient test showed that o-benzene The antifeedant activity of dibutyl dicarboxylate against Banana nematoda nymphs increased with the increase of concentration, the antifeedant concentration was 0.929mg · mL-1. The results showed that the aromatic esters of ovipositional excretion of B. tabaci were very sensitive to some herbivorous insects Strong antifeedant activity, at the same time for the phytophagous insect interspecific competition provides a theoretical basis.