棉田间作蔬菜防治B型烟粉虱

在室内用"Y"形嗅觉仪以棉花为对照测定了B型烟粉虱对6种蔬菜的选择性,不同蔬菜对B型烟粉虱诱集率的大小为:菜豆花生茴香芫荽芹菜韭菜。除了烟粉虱对菜豆的选择系数为正值外,烟粉虱对其他几种蔬菜的选择系数均为负值。6种蔬菜与棉花间作,结果表明:间作棉花上的烟粉虱成虫数量与对照存在显著差异。除了间作菜豆棉花上的烟粉虱成虫数量比对照增加外,间作花生、茴香、芫荽、芹菜、韭菜的棉花上烟粉虱成虫数量比对照均减少。

Management of Bemisia tabaci B biotype by intercropping several vegetable hosts in the cotton fields

The selectivity of Bemisia tabaci (Gennadius) B biotype to six vegetables were investigated using Y tube olfactometer in the laboratory. The results indicated that B. tabaci preferred the host plants in the following order：frijol, peanuts, fennel, coriander celery and leek. In addition, experiments by intercropping six vegetables with cotton revealed significant differences in different treatments. The results showed that intercropping peanuts, fennel, coriander, celery and leek with cotton reduced the number of B. tabaci adults on cotton，compared to the control.