植保无人机喷施26%噻酮·异唑悬浮剂与38%莠去津悬浮剂混配剂防除春玉米田杂草效果

Control Effect of Thiencarbazone-Methyl·Isoxaflutole 26%SC Mixed with Atrazine 38%SC Sprayed by Plant Protection UAV on Weed in Corn Fields

为明确植保无人机喷施26%噻酮·异唑悬浮剂与38%莠去津悬浮剂混配剂对春玉米田杂草的防效,并筛选出植保无人机防治玉米田杂草的最佳作业参数,2021年在辽宁东港开展了植保无人机喷施除草剂防除春玉米田杂草田间试验。结果表明,植保无人机喷施除草剂对杂草的防效均显著高于人工喷雾处理;无人机用水量由15 L/hm^(2)增加到30 L/hm^(2)时,防效显著增加;雾滴直径对防效的影响不明显;减药20%并使用1%迈飞飞防助剂处理的防效与正常剂量处理防效相当。与空白对照相比,植保无人机喷雾处理玉米增产17.96%~20.42%,与人工喷雾处理无显著差异。推荐在春玉米2.5~3.0叶期、杂草子叶至2叶期,采用植保无人机施用26%噻酮·异唑悬浮剂117 mL/hm^(2)和38%莠去津悬浮剂1140 mL/hm^(2)(或减药20%+1%迈飞助剂),植保无人机作业参数设置为作业高度2.0 m,作业间距3.0 m,流速1.08 L/min,速度2.0 m/s,用水量30 L/hm^(2),雾滴直径150μm,能有效防除春玉米田主要杂草。

In 2021,we designed to evaluate control effect of thiencarbazone-methyl·isoxaflutole 26%SC mixed with atrazine 38%SC sprayed by unmanned aerial vehicle(UAV)on weeds in corn fields of Donggang City,and selected the optimal operation parameters of UAV.The results showed that control effect of the herbicides sprayed by UAV were better than that of artificial spraying treatment.When the water consumption increased from 15 L/hm^(2)to 30 L/hm^(2),the control effect had a significant improvement.The effect of droplet diameter on the prevention efficiency was not obvious.The UAV treatments with 20%herbicide reduction and 1%adjuvants addition had equally effect with normal treatment.Compared with the blank control,the yield of UAV treatments increased by 16.31%-20.42%with no significant difference from that of artificial spraying treatment.It is recommended that the mixture hebicides sprayed by UAV at the 2.5-3.0 leaves stage of corn and the cotyledon-2 leaves stage of weeds,with thiencarbazone-methyl·isoxaflutole 26%SC 117 mL/hm^(2)and atrazine 38%SC 1140 mL/hm^(2)(or the reduction of herbicides 20%and the addition of Maifei adjuvants 1%).The main weeds could be controlled efficiently in spring maize field when the UAV parameters were setted as working height of 2.0 m,working interval of 3.0 m,flow velocity of 1.08 L/min,speed of 2.0 m/s,water consumption of 30 L/hm^(2),and droplet diameter of 150μm.