不同杀螨剂对切花月季红蜘蛛的防治试验

目的]筛选能有效防治切花月季红蜘蛛的杀螨剂。方法]在红蜘蛛发生初盛期用药,比较克螨特等9种药剂对温室切花月季红蜘蛛的防治效果。结果]在所用参试药剂中克螨特1 500倍稀释液对红蜘蛛防治效果最好,而且药效时间长,对红蜘蛛的控制力强,24%螨危悬浮剂3 000倍稀释液,9.5%螨即死2 000倍稀释液和3.0%浓缩阿维800倍稀释液处理2 d后的防治效果极显著地高于其他处理,在5~10 d的防治效果也很好,试验中克螨特1 500倍稀释液对月季嫩稍极个别地有药害,其他药剂均可安全使用。结论]克螨特1 500倍稀释液是一种防治红蜘蛛的理想药剂,在生产中建议克螨特、螨危、螨即死等杀螨剂交替使用,已免红蜘蛛产生抗药性。

Experiment of Different Miticides Controlling Red-spider of Cut Rose

Objective] The aim was to screen the effective miticide to control the red-spider of cut rose.Method]Applying medicaments in the initial of the fast growth period of red-spider,the control effect of the 9 medicaments such as propargite on cut rose red-spider in greenhouse was compared.Result] Among the tested medicaments,the propargite solution diluted 1 500 times had the best control effect on red-spider and had long acting effect and strong control force.The control effect of 24% envidor suspension concentrate diluted 3 000 times,9.5% fenazaquin solution diluted 2 000 times and 3.0% concentrated avermectins solution diluted 800 times was significant higher than that of other treatments for 2 d and they had better control effect in 5-10 d.The propargite solution diluted 1 500 times had phytotoxicity to several young shoot of rose and other medicaments could be used safely.Conclusion] The propargite solution diluted 1 500 times was an ideal medicament to control red-spider and several miticides such as propargite,envidor and fenazaquin were suggested to use alternatively to avoid red-spider from producing resistance.