Evaluation of herbicides aerially applied from a small unmanned aerial vehicle over wheat field

Kunpeng Zhang, Jianguang Chen, Chaoyang Wang, Libin Han, Zengzhen Shang, Guobin Wang, Meizi Wang, Xijun Deng, Yuanchen Zhang, Xingyun Wang, Pengtao Li, Yangyang Wei, Jing Wang, Xuesong Xu, Yubin Lan, Ruilin Guo

Abstract


Abstract: Wheat is one of the most important crops in the world. Unfortunately, approximately 10% of wheat production was decreased caused by weeds every year. Small Unmanned Aerial Vehicles (UAVs) have been widely applied in plant protection.  However, there is few research on weed control via (UAV) over wheat field. In this study, the effects of different spray methods with various herbicides sprayed at different dosages were evaluated in a wheat field. In the meantime, the method of similarity-difference analysis was used to evaluate the influence of multiple factors on the effectiveness of each herbicide, and the grey correlation method was adopted to analyze the indicators of control effectiveness, yield, cost, income and safety. The results showed that: 1) For weed control UAV spray application was better than manually conducted one; 2) B2 (Fluroxypyr-meptyl 20% EC) sprayed from a small UAV exhibited significant suppressive effects on weed growth; 3) C1  (600 mL/hm2 Fluroxypyr-meptyl 20% EC) was the optimum dosage; 4) The treatment group A1B2C1 (spraying 600 mL/hm2 Fluroxypyr-meptyl 20% EC via a small UAV) was the best combination in weed control.  Additionally, the influence of UAV spraying and manual spraying on the weight of weeds was not obvious, but different herbicides and doses have different promoting effects on weeds height.  Nevertheless, herbicides sprayed from UAV increased wheat yield from 8097.58 kg/hm2 of manual operations to 9283.40 kg/hm2.  The study may provide novel insights into the application of herbicides sprayed from UAV for weed control in wheat field.

Keywords: small UAV, herbicide, wheat, weed control, herbicide dosages, grey correlation method

DOI: 10.33440/j.ijpaa.20200301.61

 

Citation: Zhang K P, Chen J G, Wang C Y, Han L B, Shang Z Z, Wang G B, et al. Evaluation of herbicides aerially applied from a small unmanned aerial vehicle over wheat field.  Int J Precis Agric Aviat, 2020; 3(1): 49–53.


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