Experiment on Control Effect of Different Pesticide Concentration Using Air-assisted Sprayer

Qiu Wei, Gu Jiabing, Ding Weimin, Lü Xiaolan, Sun Chengda, Lu Jiang

Abstract

To define different effects of several concentrations pesticide for pest prevention under air assisted spraying condition, pest population decline rate and disease index were used to test effects of two kinds pesticide which were applied to pear aphids and pear black spot. Furthermore, the droplets distribution inside the canopy was also analyzed with Brilliant sulfaflavine, and the reasonable range of pesticide concentration for air-assisted spraying application was proposed. The results showed that: the amount of pesticide was 0.24L per tree, which was decreased by 33.3% compared to artificial spraying under the condition that the sprayer speed was 1m/s, the rotary speed of fan was 1200r/min, and the wind flow was 7.2L/min in one side. Compared to artificial spraying, air-assisted spraying application can achieve better control effect with the same quality of pesticides. The distribution of droplets under air-assisted condition was better than traditional way, and the amount of pesticide was suggested 1/3 that of artificial spraying, at the same time, the concentration could be increased properly in order to reach better effect, and the actual pesticide mass was suggested 1/3～1/2 that of artificial spraying.

 

Keywords: Orchard sprayer, Air-assisted, Pesticide concentration, Control effect

 

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References


Zhai Changyuan, Wang Xiu, Ge Jishuai, et al. Design of droplet size measuring system of air-assisted spraying and experiment on its influencing factors[J]. Transactions of the CSAE, 2012, 28( 19) ; 33 -38. (in Chinese)

Song Jianli, He Xiongkui, Zhang Jing, et al. Design of “П’-type recycling tunnel sprayer[ J]. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(4) ; 31 -36. (in Chinese)

Song Shuran, Wang Weixing, Hong Tiansheng, et al. Testing research on effects of top layer rice fog drop interception on pesticide spraying distribution in rice fields[J]. Transactions of the CSAE, 2003, 19(6) : 114 — 117. (in Chinese)

Gu Jiabing, Zhu Heping, Ding Weimin, et al. Droplet size distribution of adjuvant-amended sprays from an air-assisted five-port PWM nozzle[J]. Atomization and Sprays, 2011 , 21(3) : 263 -274.

Cross J V, Walklate P J, Murray R A, et al. Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer; 3. effects of air volumetric flow rate[J]. Crop Protection, 2003, 22(2) ; 381 -394.

Qiu Baijing, Xu Xichao, Deng Bin, et al. Effect of area ratio on mixing homogeneity in jet-mixing apparatus[ J ]. Transactions of the Chinese Society for Agricultural Machinery, 2011 , 42( 10) ; 95 - 100, 83. (in Chinese)

Qiu Baijing, Yin Lei. Measurement of pesticide concentration on the leaf based on Vis/NIR spectroscope[ J]. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(9) ; 197 -201 , 208. (in Chinese)

Qiu Wei, Ding Weimin, Wang Xiaochan, et al. 3WZ - 700 self-propelled air-blowing orchard sprayer[J]. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(4) ; 26 -30, 44. (in Chinese)

Qiu Wei. Development and experimental research of self-propelled air assisted orchard sprayer[ D]. Nanjing: Nanjing Agricultural University, 2012. (in Chinese)

Gao Yuanyuan, Zhang Yutao, Zhang Ning, et al. Primary studies on spray droplets distribution and control of aerial sprayingusing unmanned aerial vehicle (UAV) against wheat midge[J]. Crops, 2013(2) : 139 — 142. (in Chinese)

Feng Chao, Zhang Chengslieng, Wang Jing, et al. Comparison of different vaporizers for the evaluation of pesticide efficacy in tobacco field [ J]. Chinese Tobacco Science, 2011, 32( 1 ): 52 —55. (in Chinese)


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