Effects of Spray Parameters on the Effective Spray Width of Single-Rotor Drone in Sugarcane Plant Protection

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RESEARCH ARTICLE

Effects of Spray Parameters on the Effective Spray Width of Single-Rotor Drone in Sugarcane Plant Protection Ping Zhang1,3 • Wei Zhang1,3 • Hai-Tian Sun2 • Feng-Guang He4 Hai-Ba Fu1 • Li-Qiang Qi1 • Li-Juan Yu1 • Li-Yu Jin1 • Bo Zhang1 Jian-Sheng Liu3,5

• •

Received: 15 May 2020 / Accepted: 4 September 2020 Ó Society for Sugar Research & Promotion 2020

Abstract Sugarcane is the most important sugar crop in the world. The development of sugarcane plant protection by drones is still at the early stage. The evaluation and determination of the effective spray width and droplet distribution in the effective range of aerial spray not only improve the efficiency and quality of the aerial spray operation, but also reduce the pollution of chemical pesticides. To study the influence of the spray parameters of single-rotor drone on the effective spray width and droplet deposition in sugarcane canopy, experiments with two factors (flight height and flight velocity) and three levels were carried out. The results showed that the major factor affecting the effective spray width was drone flying height. For droplet density, the combination of 5.5 m flight height and 2.0 m/s flight velocity was found suitable. Under the condition of 6.0 m of flight height and 2.0 m/s of flight velocity, the effective spray width was the optimal. For droplet deposition uniformity, the combination of 6.0 m flight height and 3.0 m/s flight velocity was suitable. Under & Wei Zhang [email protected]; [email protected] 1

Engineering College, Heilongjiang Bayi Agricultural University, No.5 Xinfeng Road, High Tech Zone, Daqing 163319, Heilongjiang, China

2

Chinese Academy of Tropical Agricultural Sciences, South Subtropical Crops Research Institute, Zhanjiang 524091, Guangdong, China

3

Modern Agricultural Industry Technology Provincial Cultivation Collaborative Innovation Center of Great Northern Wilderness, Daqing 163319, Heilongjiang, China

4

Chinese Academy of Tropical Agricultural Sciences, Tropical Agricultural Machinery Research Institute, Zhanjiang 524091, Guangdong, China

5

Jianshan Farm, Heihe 161444, Heilongjiang, China

the comprehensive consideration, the optimal spraying parameters were chosen as 6.0 m of flight height and 2.5 m/s of flight velocity, which led to the lowest usage of pesticide at 15.38 L/ha. The results of this research can provide guidance for choosing proper parameters of singlerotor drone in sugarcane protection. Keywords Single-rotor drone  Sugarcane  Effective spray width  Droplet deposition uniformity  Pesticide usage

Introduction Sugarcane is the important sugar crop in the world, with an annual output of sucrose accounting for more than 76% of total sugar production (Feng et al. 2019; Zhou et al. 2016). Meanwhile, sugarcane is the most promising energy crop, accounting for 63.8% of raw materials used to make fuel ethanol (Grivet and Arruda 2002; Li and Yang 2009; Stevanato et al. 2019). The complex growth environment and susceptible varieties of sugarcane often lead to the outbreak of

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