氟啶胺悬浮剂防治玫瑰二斑叶螨的效果研究

Study on Field Control Effect of Fluazinam Suspension against Tetranychus urticae

二斑叶螨繁殖速度快,世代重叠严重,随气温升高繁殖加快,是一种世界性害螨,也是目前发现的节肢动物中抗药性最高的生物之一。本文以观赏花卉玫瑰上发生的二斑叶螨为研究对象,通过田间药效试验比较了不同稀释倍数的500g/L氟啶胺悬浮剂对其的田间防效。结果表明:从药后1d起,500g/L氟啶胺悬浮剂的防效不断提高;药后7d时,该药剂的防效达到最高,其中1500倍液防效最高,为88.33%;15d时,防效依然保持在87.79%。对照试剂5%阿维菌素乳油防效药后3d时达到最高,为79.46%,之后防效不断下降。与对照试剂5%阿维菌素乳油相比,500g/L氟啶胺悬浮剂具有良好的速效性和持效性。

Tetranychus urticae Koch is fast growing,overlapping generations,and accelerating with the increase of temperature.It is a worldwide pest mite,which is one of the most resistant species found in arthropods.Taking Tetranychus urticae Koch which occurred on rugosa rose as research object,the field control on the effects of 500g/L fluazinam suspension with different dilution times were compared.The results showed that 500g/L fluazinam suspension had good quick effect and persistence.The control effect was improved continuously from 1 day after treatment,the control effect of 1500 times reached the highest at 7 days,which was 88.33%.At 15 days,the control effect remained at 87.79%.The control agent(5%avermectin EC)achieved the highest(79.46%)at 3d after treatment,and then decreased day by day.Compared with the control reagent of 5%avermectin 500g/L,500g/L fluazinam suspension had a quick and lasting effect.