3种热带杂草挥发油干扰小菜蛾行为的研究

Influence of three volatiles from tropical rank grasses on behavior of Plutella xylostella

利用嗅觉反应研究了3种热带杂草挥发油对小菜蛾Plutellaxylostella行为的影响.结果表明,3种热带杂草挥发油对小菜蛾Plutellaxylostella成虫有好的驱避作用,且随挥发油量的增加驱避作用加强,白花蒿Artemisiaargyi和假Piperbetle2种挥发油比飞机草Eupatoriumodoratum挥发油对成虫的驱避作用更明显.在产卵驱避和拒食作用试验中,3种热带杂草挥发油对小菜蛾表现出一定的产卵驱避作用和拒食作用,且随着施用浓度的增加产卵驱避和拒食作用加强,随着时间的延长产卵驱避作用和拒食作用减弱.3种挥发油的产卵驱避效果和拒食活性大小分别为:假挥发油>飞机草挥发油>白花蒿挥发油.

Influence of three volatiles from tropical rank grass on behavior of Plutella xylostella was studied in the test of olfactory response. Three volatiles of tropical rank grasses showed a good deterrent effect on the adult of the diamondback month (DBM), and that the deterrent effects strengthened with the flow rate of volatiles enhancing. There was better deterrent effects on adults of DBM for the volatiles from Artemisia argyi and Piper betle than that from Eupatorium odoratum . In the test of oviposition deterrent and antifeedant of DBM, these volatiles extraeted from tropical rank grasses showed a inhibitory effects. The order of oviposition deterrent and antifeedant of DBM effected by the volatiles is: Piper betle> Eupatorium odoratum> Artemisia argyi.