Dai Jianqing, Huang Zhiwei, Jiawei Du
Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences.
Ying Yong Sheng Tai Xue Bao. 2005 Jun;16(6):1095-8.
In this paper, the effects of varying concentration azadirachtin on tobacco cutworm Spodoptera litura were investigated in both laboratory and field. The results showed that azadirachtin exhibited a wide range of bioactivities, including anti-feeding, growth inhibition, larval toxicity, and oviposition deterrent. This compound could significantly reduce pupal weight and pupation and eclosion rates. After treated with 12 microl x L(-1) azadirachtin for 5 and 7 days, the third instar larvae only weighted 36.8% and 14.5% of the untreated ones, and their development took approximately 6 days longer, with a 27.79% pupation rate and a 37.23% emergence rate, significantly lower than the control by 85.66% and 82.11%, respectively. Azadirachtin was more efficient for the low instar larva than the old ones. Field experiments confirmed that after 7 days application, azadirachtin could effectively control Spodoptera litura, being more efficient than the chemistry pesticide, 10% Chu-Jin SC.
本文在实验室和田间研究了不同浓度印楝素对烟草夜蛾斜纹夜蛾的影响。结果表明，印楝素具有广泛的生物活性，包括拒食、生长抑制、幼虫毒性和产卵驱避作用。该化合物可显著降低蛹重、化蛹率和羽化率。用12 μL/L印楝素处理5天和7天后，三龄幼虫体重仅为未处理幼虫的36.8%和14.5%，其发育时间延长约6天，化蛹率为27.79%，羽化率为37.23%，分别比对照显著低85.66%和82.11%。印楝素对低龄幼虫比对老龄幼虫更有效。田间试验证实，施用7天后，印楝素能有效防治斜纹夜蛾，比化学农药10%除尽悬浮剂更有效。
