Effects of suitable spray volume and adjuvant on droplet deposition of plant protection UAV and control efficacy against rice blast disease

doi:10.14088/j.cnki.issn0439-8114.2026.01.013

Abstract

Abstract: Field trials were conducted using a plant protection UAV for spraying 400 g/L tebuconazole · prochloraz emulsion in water（EW）, to investigate the effects of different spray volumes and adjuvant addition on droplet deposition, droplet density, pesticide utilization rate, and control efficacy against rice blast in rice canopies. Results showed that, under the recommended dosage of 525 mL/hm², the droplet deposition, density, pesticide utilization rate, and control efficacy were generally better with spray volumes of 22.5 L/hm² and 30 L/hm² compared to 15 L/hm². Adjuvant addition significantly improved all measured parameters. Particularly under the condition of 22.5 L/hm² spray volume combined with adjuvant (added at 337.5 mL/hm²), droplet deposition performance and pesticide utilization were favorable, with the highest pesticide utilization rate reaching 52.39%, and control efficacy against rice blast remaining above 81% after two applications, showing no significant difference from the 30 L/hm² treatment. For practical application, the spray volume of 22.5 L/hm² with the corresponding proportion of adjuvant was recommended, which could ensure control efficacy while enhancing application efficiency and comprehensive benefits.

Key words: plant protection UAV, spray volume, droplet deposition, rice blast, control efficacy

CLC Number:

S435.111.4⁺1

YANG Shu-lan, ZHONG Guo-hua, ZHANG Yang, YANG Wen-xi, LU Xiang-yu, LUO Yan-mei, LUO Jing-sheng. Effects of suitable spray volume and adjuvant on droplet deposition of plant protection UAV and control efficacy against rice blast disease[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(1): 73-77.

References

[1] 陈品,徐春春,纪龙,等.2024年我国水稻产业形势分析及2025年展望[J].中国稻米,2025,31(2):1-5.
[2] 张鑫,邢立志.我国水稻主要病害防治研究进展[J].安徽农业科学,2019,47(23):11-13.
[3] 李万芬. 水稻稻瘟病的发生与防治[J].特种经济动植物,2025,28(2):113-115.
[4] 张顾旭,陆爽,武雯,等.不同药剂防治水稻稻瘟病田间药效试验简报[J].上海农业科技,2020(2):104-105.
[5] 何雄奎. 我国植保无人机的研究与发展应用浅析[J].农药科学与管理,2018,39(9):10-17.
[6] 兰玉彬,陈盛德,邓继忠,等.中国植保无人机发展形势及问题分析[J].华南农业大学学报,2019,40(5):217-225.
[7] ZHAN Y L,CHEN P C,XU W C,et al.Influence of the downwash airflow distribution characteristics of a plant protection UAV on spray deposit distribution[J].Biosystems engineering,2022,216:32-45.
[8] 陈盛德,兰玉彬,李继宇,等.小型无人直升机喷雾参数对杂交水稻冠层雾滴沉积分布的影响[J].农业工程学报,2016,32(17):40-46.
[9] CHEN S D,LAN Y B,ZHOU Z Y,et al.Research advances of the drift reducing technologies in application of agricultural aviation spraying[J].International journal of agricultural and biological engineering,2021,14(5):1-10.
[10] 徐广春,徐鹿,石伟山,等.植保无人机施药防治水稻病虫害的研究进展[J].江苏农业科学,2023,51(7):1-7.
[11] 顾中言,徐德进,徐广春.田间药液用量影响农药单位剂量防治效果的原因分析[J].中国农业科学,2018,51(13):2513-2523.
[12] NY/T3630.1—2020,农药利用率田间测定方法第1部分:大田作物茎叶喷雾的农药沉积利用率测定方法-诱惑红指示剂法[S].
[13] GB/T 17980.19—2000,农药田间药效试验准则(一)杀菌剂防治水稻叶部病害[S].

[1]	WANG Wen-xiao, CHEN Ting-ting, QUE Ya-wei, XUE Min-feng, NI Hao-xiang, DENG Chun-lin, YANG Li-jun, LI Li, GONG Shuang-jun, ZHOU Hua-zhong, ZENG Fan-song. Application of Bacillus velezensis EA19 to substitute part of pydiflumetofen in the control of Fusarium head blight [J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(1): 66-72.
[2]	SONG Yi-xing, LIU Xin-yu, LIU Zheng. Green biocontrol efficacy of different Bacillus strains against cucumber powdery mildew [J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(7): 68-73.
[3]	HU Xue-min, ZHU Zhi-gang, JIANG Zhao-qin, JI Xin, CHEN Li-jun, SHI Hong-zhong. Construction of a prediction model for Xinyang rice blast based on all subsets regression and BP neural network [J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(12): 104-109.
[4]	LI Wei-jing, WANG Hong-yuan, ZHANG Yi-bin, XU Yang, LI Hao, LIU Hong-bin. Effect of rice-crab symbiosis on disease and weeds in paddy field and rice yield [J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(9): 64-69.
[5]	ZHAO Shi-ming, WANG Mei-ling, LYU Feng-xia. Isolation, purification and molecular identification of the pathogen of rice blast [J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(6): 64-66.
[6]	LUO Ya-wei, QIN Zhen-qiang, LI De-wei, LIANG Tian. The field efficacy test of different insecticides with one-time application to sugarcane borers [J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(3): 82-86.
[7]	YU Wei-pu, ZHOU Zhong-xiong, XU Guo-hua, WU Yun-zi, LIU Mian, XU Hui, YANG Hong-yong, XIE Lei. Study on appropriate flight parameters of disease and pest control for plant protection UAV in regenerated rice [J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(22): 125-127.
[8]	TU Jun-ming, CAO Zhi-gang, CHEN Jie, JIN Hong-mei, ZHANG Qun, YOU Ai-qing, ZHOU Yuan-kun. Breeding of a new early rice cultivar Gangzaoxian 11 with rice blast resistance [J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(24): 9-11.
[9]	FENG Chun-shui, ZHANG Zai-ren, CHEN Wen-hua. Experimental study on the screening of insecticides for the control of rice blast [J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(22): 108-110.
[10]	HUANG Hai-qing, WANG Chang-jiu, LI Hong-sheng, LI Ji-hui, LI Chun-yong, CAI Juan, WANG Gang. Breeding of a new indica hybrid rice variety Yixiangyou 66 with good quality and rice blast resistance [J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(12): 22-23.
[11]	ZHAO Xia-xia, WANG Xu-ming, XU Piao, ZHAO Li-na, HU Yan, CHEN Jing-yang, HUANG Yong-xiang, LI Wei, GUO Jiang-fu. Research and prospect of rice blast resistance [J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(11): 5-9.
[12]	LI Li, ZHU Wen-da, LI Lin, LI Jin-quan. Studies on Broadleaf Weed Control Effects of Fluoroglycofen-ethyl 10%EC in Soybean Fileds [J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(7): 65-68.
[13]	LI Jin-ping, HOU Zheng-rong, SUN Bei-bei, ZHAO Chen, WANG Chao, GUO Xi-hong, YIN Zhe. The Toxicity, Field Control Efficacy of Two Biological Preparations of Spinosad to Thrips palmi Karny（Thysanoptera：Thripidae） [J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(6): 64-66.
[14]	ZENG Fan-song, LI Su-qin, WANG Yun-feng, LIU Qi-mei, XIANG Li-bo, YANG Li-jun, GONG Shuang-jun, SHI Wen-qi. Identification of An Actinomyce Isolate JK-1 and Its Antifungal Activity Against the Rice Blast Fungus [J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(24): 96-99.
[15]	SUN Fu, TANG Mei, HE Cong, LU Hong-cong. Improvement of Rice Blast Resistance in Red Rice by Pyramiding of Pi1 and Pi2 through Molecular Marker-Assisted Selection [J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(18): 23-27.