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印楝素对家白蚁趋向和取食的影响 总被引:12,自引:0,他引:12
本研究试验印楝素杀虫剂对家白蚁趋向和取食行为的影响。在10天内家白蚁工蚁忌避印楝素10,30,100,300和500ppm处理的滤纸。在室内的选择和非选择试验中,家白蚁工蚁对≥10ppm印楝素处理的滤纸取食量明显减少。 相似文献
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Leaf disk choice test bioassays demonstrated that formulated neem seed oil (NSO) was equally deterrent to first- and third-instar nymphs and adult strawberry aphids,Chaetosiphon fragaefolii (Cockerell). Concentrations of NSO resulting in 50% feeding deterrence were approximately 1.1% for this species. The rapid disruption of aphid feeding (<1 hr) was not related to the presence of the limonoid azadirachtin, and deterrence likely results from the combined activity of several compounds. Activity toC. fragaefolii disappeared within 12–24 hr following application to strawberry in the greenhouse. NSO was deterrent to only half of the six aphid species tested. The antifeedant properties of neem do not appear to contribute significantly to the control of aphids and the viruses they transmit. 相似文献