农药助剂对无人机施用甲维盐微乳剂的雾滴特性及蓟马防效的影响

摘要

我国在使用农药防控农作物病虫害上,无人机施药技术仍处于初级阶段,农药有效利用率低,飘失严重,防治效果较差.本研究通过添加助剂来增加药液到达靶标作物上的雾滴密度和药液沉积量,提高利用2.3%甲氨基阿维菌素苯甲酸盐微乳剂进行无人机喷雾对蓟马的防效.研究结果表明,添加助剂后,药液冠表层雾滴密度从84.3个/cm2增加到了130.8个/cm2,沉积量从0.4 μL/cm2提高到1.7 μL/cm2;内冠层雾滴密度从52.5个/cm2增加到99.1个/cm2,沉积量从0.1 μL/cm2提高到0.8 μL/cm2;药后5 d对蓟马的校正防效由31.18%提高到91.67%,试验结果表明,合理地添加助剂有利于提高无人机喷雾雾滴密度和沉积量,显著提高了农药对蓟马的防效.%In recent years, the pesticide application technology was still on the initial stage in our country by the aviation plant protection machinery, the effective utilization of the pesticide was low, the drift of the pesticide was serious, and the control effect was poor. In this paper, the correlation between the droplet density, the deposit rate about the 2.3% emanectin benzoate ME and the control efficiency against the thrips on the chili was investigated by the unmanned plane. The results showed that the droplet density was increased from 84.3 droplets/cm2 to 130.8 droplets/cm2, the deposit rate was increased from 0.4 μL/cm2 to 1.7 μL/cm2 after adding the adjuvant on canopy; in canopy the droplet density was increased from 52.5 droplets/cm2 to 99.1 droplets/cm2 after adding the adjuvant, the deposit rate was increased from 0.1μL/cm2 to 0.8 μL/cm2 after adding the adjuvant. The control efficiency against the thrips was 91.67%. The results showed that the reasonable adjuvant was helpful to increase the droplet density, deposit rate spray, and improved the effectiveness against the thrips during the aerial spraying.