Maize (Zea mays L.) lodging is an important factor limiting its yield increase worldwide. EDAH (containing 27% ethephon and 3% DA-6) is commonly used to decrease lodging. There is an urgent need to select efficient application methods of agrochemical for better spray deposition. In our research, an unmanned aerial vehicle (UAV) (15 L ha−1 and 30 L ha−1) with EDAH dosages of 72 and 90 g a.i. ha−1, and electric knapsack sprayers (EKS) (450 L ha−1) with dosages of 90 g a.i. ha−1 were used to compare the droplet deposition distribution, uniformity and maize growth. According to our research, EDAH applied by UAV had a higher droplet deposition rate than EKS; EKS had a higher droplet coverage rate, deposition density, droplet distribution uniformity. At the same dosage of EDAH, the UAV had a better effect on controlling maize growth than EKS, and almost equal effects were detected when the dosage applied by the UAVs was decreased by 20%. Considering the lodging occurrence and yield, we recommend that the dosage of EDAH applied by UAVs should be 72 g a.i. ha−1 when there is weak lodging and 90 g a.i. ha−1 when there is heavy lodging, with a spray volume of 15 L ha−1.
CITATION STYLE
Wang, Z., Hussain, M., Huang, G., Yin, J., Guo, Y., Mo, Y., … Tan, W. (2022). Better Droplet Deposition and Internode Shortening Effects of Plant Growth Regulator EDAH on Maize Applied by Small Unmanned Aerial Vehicle Than Electric Knapsack Sprayer. Agriculture (Switzerland), 12(3). https://doi.org/10.3390/agriculture12030404
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