Cotton Science

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Effects of adjuvants on physicochemical properties of nanopesticide applied by plant protection unmanned aerial vehicles and control of aphids in cotton field

Hu Hongyan, Ma Yajie, Shan Yongpan, Song Xianpeng, Wang Dan, Ren Xiangliang, Li Jie, Niu Yibo, Wu Changcai, Ma Xiaoyan, Ma Yan

Cotton Science, 2023, 35(3): 239-250. DOI: 10.11963/cs20220033

Fig. 4 Comparison of the droplet density (A) and droplet size (B) among nanopesticide treatments at different positions of the cotton canopy Different small letters above the same set of bars represent significant differences (P < 0.05).

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Fig. 1 Plant protection unmanned aerial vehicle (UAV) spraying test (A) and droplet test card layout (B)
Table 1 Particle size of nanopesticide and conventional pesticide
Fig. 2 Static surface tension (A) and dynamic surface tension (B) of spray solutions
Fig. 3 Dynamic contact angle (A) and morphological changes (B) over time of droplet on cotton leaves
Table 2 Comparison of the wetting area and droplet evaporation performance at 33 ℃ of each treatment solution
Fig. 5 Comparison of the control efficacy on cotton aphids among nanopesticide treatments NF and RNF mean plant protection unmanned aerial vehicles (UAV) spray conventional dosage and 20% reduced dosage of nanopesticide, respectively; A1, A2 and A3 mean adjuvants Youruopai, Jiexiaofeng and Aero-mate 320, respectively; CM means manual spray conventional pesticide. Different small letters above the same set of bars represent significant differences among the different treatments at the same survey time (P < 0.05).

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