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采用坡地种植蓑草、苜蓿、香根草和紫穗槐等植物篱的方法,研究了其对小麦蚜虫及其天敌种群的影响.结果表明:在20°坡度试验区,紫穗槐植物篱显著抑制了麦蚜种群的发生,且麦田拟寄生物的密度等于或显著低于香根草区.在12°坡度试验区,苜蓿和蓑草推迟了麦蚜种群发生的高峰期,蓑草作为植物篱可以显著抑制麦蚜种群数量;苜蓿区麦田拟寄生物密度显著高于对照,瓢虫种群密度等于或显著高于蓑草区.蓑草挥发物对麦长管蚜和禾谷缢管蚜均有驱避作用,而显著引诱猫蛛科1种蜘蛛;苜蓿挥发物对麦长管蚜具有引诱作用;苜蓿和蓑草挥发物对瓢虫的行为反应均无明显影响.紫穗槐和蓑草作为坡地植物篱,不仅能防护水土流失,而且有助于调控害虫及其天敌种群.
The effects of hedgerows, alfalfa, vetiver and Amorpha fruticosa were studied on the population of wheat aphids and their natural enemies on the slope.The results showed that in the 20 ° slope test area, Inhibited the occurrence of the wheat aphid population and the density of the parasitoids in the wheat field was equal to or significantly lower than that in the vetiver area. In the 12 ° slope test area, alfalfa and hayweed delayed the peak occurrence of the wheat aphid population. Hedgerow can significantly inhibit the population of wheat aphid population; alfalfa wheat field parasitism density was significantly higher than the control, ladybug population density was equal to or significantly higher than the hay field .And volatile compounds on wheat aphid and cereal aphid There is a repellent effect, and significantly induced a spider Arachnida spider; alfalfa volatiles on the wheat aphid lure; alfalfa and Achnatherum sp. Volatiles on the ladybug behavioral response had no significant effect. Amorphophallus and Agkistrodon As a slope of hedgerows, not only to protect soil erosion, but also help regulate pests and their natural enemy populations.