苦槛蓝挥发油对小菜蛾的生物活性

研究了苦槛蓝挥发油对小菜蛾的生物活性。结果表明，苦槛蓝挥发油对小菜蛾成虫具有强烈的驱避作用．小菜蛾成虫在四臂嗅觉仪中首选次数、平均停留时间从多到少的顺序是3臂、1臂、4臂、2臂，具有远离处理臂的趋势，其中雄虫比雌虫明显。且气体流速为200ml·min^-1时驱避作用最为显著。按方法3处理第一天对小菜蛾成虫的产卵驱避率(OCR)、干扰作用控制指数(IIPC)分别为94．48％、0．0552。此外，从挥发油中分离到一个液体成分，经鉴定确定为myoporone(C15H22O3)。

Bioactivity of volatile oils from Myoporum bontioides on Plutella xylostella

This study showed that the volatile oils from Myoporum bontioides had a significant repellent action on Plutella xylostella. When Plutella xylostella adults entered into the 4-arm selective olfactometer, the preferred times and average staying duration, in the order from more to less, were 3, 1, 4, and 2 arms, which showed a tendency of keeping away from the treatment arms. The males were more sensitive to the volatile oils than the females, when the velocity of flow was 200 ml.min-1. On the first day of the 3rd bioassay, the oviposition deterrent rate and IIPC of the volatile oils on Plutella xylostella adults was 94.48% and 0.0552, respectively. A liquid component of the volatile oils from Myoporum bontioides was isolated, purified, and identified as myoporone.