Department of Plant Science, University of British Columbia, V6T 1Z4, Vancouver, British Columbia, Canada.
J Chem Ecol. 1993 Aug;19(8):1761-73. doi: 10.1007/BF00982306.
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.
叶片圆盘选择试验生物测定表明，配制的印楝籽油（NSO）对第一龄和第三龄若虫以及成年草莓蚜虫（Chaetosiphon fragaefolii（Cockerell））同样具有驱避作用。对该物种而言，导致 50%取食抑制的 NSO 浓度约为 1.1%。蚜虫取食的迅速中断（<1 小时）与存在杀虫素 azadirachtin 无关，驱避作用可能是几种化合物共同作用的结果。在温室中施用于草莓后 12-24 小时，对 C. fragaefolii 的活性消失。NSO 仅对所测试的六种蚜虫物种中的一半具有驱避作用。印楝素的抗取食特性似乎对蚜虫及其传播的病毒的控制没有显著贡献。
