不同药剂防治水稻二化螟的效果分析

Effect of Different Insecticides on the Control of Oryza sativa Chilo suppressalis

为探究不同药剂防治水稻二化螟的效果,以湖南省祁阳市为试验地点,设置10%甲维·甲虫肼SC、25%喹硫磷EC和3%阿维菌素EC 3种药剂处理和空白对照组,每种药剂处理组分别设3个浓度梯度,比较不同药剂处理对水稻二化螟的防治效果。结果显示,处理组B(10%甲维·甲虫肼SC,250 mL/hm^(2))对水稻二化螟的防治效果最好,施药后14天的防治效果和枯心率分别为83.54%和4.82%,该条件下水稻的株高、穗长、千粒质量、产量分别为85.34 cm、21.36 cm、27.82 g、6898.54 kg/hm^(2)。

In order to investigate the effect of different insecticides on the control of Oryza sativa Chilo suppressalis,three kinds of insecticides were set up in Qiyang City as the test site.Three concentrations gradients were set for each treatment group and a blank control group was set up to compare the effect of different insecticides on the control of Oryza sativa Chilo suppressalis.The results showed that treatment group B(10%metrel·beetle hydrazine SC,250 mL/hm^(2))had the best control effect on the Oryza sativa Chilo suppressalis,and the control effect and dry heart rate of 14 days after application were 83.54%and 4.82%,respectively.The plant height,ear length,thousand grain weight and yield of rice were 85.34 cm,21.36 cm,27.82 g and 6898.54 kg/hm^(2).