【摘要】 【目的】研究不同剂型农药以及不同类型喷雾助剂对航空喷雾防治柑橘木虱Diaphorina citri Kuwayama的雾滴飘移的影响,探究如何减少雾滴飘移,以期为无人机低空低容量喷雾技术在防治柑橘木虱中的应用提供指导。【方法】选取登记用于防治柑橘木虱的两种杀虫剂和3种助剂,通过采用风洞试验室内模拟田间,风速设定为2 m/s和4 m/s,采用示踪剂法测定距喷头不同距离的药剂飘移沉积情况。【结果】当风速为2 m/s,添加倍达通和Y-20079两种助剂添加量为1%时,药剂在垂直与水平方向沉积均相对减少;添加806助剂后,添加量为0.5%时垂直与水平方向沉积均减少;当风速为4 m/s时,助剂Y-20079添加量为1%,可减少药剂在垂直与水平方向沉积;100 g/L吡丙醚乳油(稀释200倍)和20%噻虫胺悬浮剂(稀释40倍)相比,风速为2 m/s和4 m/s时,垂直和水平方向药剂沉积量均明显减少。【结论】采取低空低容量喷雾技术时,农药的乳油制剂相比于悬浮剂更容易飘失;通过添加倍达通、806和Y-20079等助剂,可减少雾滴的飘移。更多还原

【Abstract】 [Objectives] To evaluate the effects of different insecticide formulations and spray adjuvants on spray droplet drift during aerial application, and provide instructions on aerial, low volume spraying for the control of Diaphorina citri Kuwayama. [Methods] Two insecticide formulations and three spray adjuvants were tested. The deposition of spray droplets on polyethylene rope at different distances from the spray nozzle was measured at simulated wind speeds of 2 m/s and 4 m/s respectively, in a wind tunnel. [Results] At a simulated wind speed of 2 m/s, droplet deposition decreased both vertically and horizontally after adding the spray adjuvants Beidatong or Y-20079 at a concentration of 1%, or the adjuvant 806 at a concentration of 0.25%. At a simulated wind speed of 4 m/s, spray droplet deposition decreased both vertically and horizontally after the addition of 1% Y-20079. At simulated wind speeds of both 2 m/s and 4 m/s, low volume aerial spraying of 100 g/L pyriproxyfen EC produced noticeably less vertical and horizontal droplet deposition than 20% thiamide SC. [Conclusion] Spray drift during low volume aerial spraying is affected by insecticide formulation and can be reduced by adding the adjuvants Beidatong, 806 and Y-20079.更多还原