玉米田增效剂及药剂减施措施对农药沉积分布的影响

【目的】研究增效剂及药剂减施措施对玉米植株沉积分布的影响,为基于增效剂的农药减施防治手段提供理论依据。【方法】采用大疆T16型无人机在玉米抽穗期进行喷雾施药处理,以34％乙多·甲氧虫悬浮剂、20％氯虫苯甲酰胺悬浮剂为试验药剂,添加飞防助剂配合不同增效剂(激健、辉丰、欧克森)及药剂减施梯度处理,分析其对玉米植株在沉积量及沉积利用率的影响。【结果】在药剂减施处理中,减施30％处理在玉米植株上有最大沉积量且沉积利用率可达到45.60％;添加飞防助剂在玉米植株对药剂沉积利用率有显著性提高,并对上层沉积量有明显提高,但对中、下层沉积量无显著影响;添加增效剂处理在玉米植株上相比于对照对沉积量及沉积利用率无显著性影响。【结论】合理添加新型增效剂减施30％对农药利用率无显著性影响;添加无人机飞防助剂可有效提升农药利用率。

Influence of Pesticide Reduction and Synergist on Utilization Rates and Droplets Distribution in Corn Field

【Objective】 To validate the influence of pesticide reduction and synergist on utilization rates and droplets distribution in corn field in the hope of providing theoretical basis for protection measures based on synergist and reduction of pesticide. 【Methods】 34％ Ethoxyl methoxyhydrazide and 20％ chlorfenoxamide were sprayed in corn filed at heading stage by Dajiang Unmanned Aerial Vehicle (UAV) T16 to test the influence of synergists (Jijian, Huifeng, Oukesen) or gradient reduction of pesticide on utilization rates and droplets distribution on corn plants. 【Results】 In the treatment of pesticide reduction, reducing usage of 30％ pesticide treatment reached the maximum of droplets distribution and the utilization rates was 45.60％. Adding additive could significantly increase the utilization rates, and also droplets distribution on the upper layer on corn plant, but no influence on middle or lower layer. Adding synergist didn’t lead to a significant effect on utilization rates and droplets distribution. 【Conclusion】 There is no significant influence on utilization rates or droplets distribution by adding synergist; Adding plant protection specific UAV-additives could significantly increase utilization rates, droplets distribution and deposition density.