Reduction of spray drift by close spraying of trellis-trained orchard crops
2020
Ota, T. (NARO, Institute of Agricultural Machinery, Saitama-shi, Saitama (Japan)) | Yamada, Y. | Kanamitsu, M. | Yoshida, T. | Mizukami, T. | Miyahara, S. | Yuasa, K. | Azuma, K. | Shimada, T.
To reduce spray drift for trellis-trained orchard crops, we manufactured an experimental orchard sprayer to use spray arms that could spray closer to trellis, with flat fan nozzles. In a vineyard, a drift distance was reduced from 30 m at spraying by the conventional orchard sprayer with a fan's air volume of 4.8 m cubic 3 /s to 10 m with either no air blast or an air volume of 3.2 cubic m /s at spraying by the orchard experimental sprayer. In a Japanese pear orchard, it is not clear that drift was reduced when the air volume was reduced from 4.8 cubic m /s with the conventional orchard sprayer to 3.2 cubic m /s with the experimental orchard sprayer.
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