Design of target-variable spraying system based on FAVD of fruit tree canopy

作者：Shijie Jiang, Wenwei Li, Hao Ma, Kexin Wang, Zhe Du, Yongjun Zheng · 发表于：Frontiers in Plant Science · 年份：2025 · DOI：10.3389/fpls.2025.1582664 · 被引用次数：5 · 研究领域：Plant Surface Properties and Treatments、Plant Physiology and Cultivation Studies、Lipid metabolism and biosynthesis

Introduction: Using air-assisted sprayer for chemical pesticide application is the main method for controlling pests and diseases in orchards. Target-variable spray based on canopy characteristics is an effective means to solve the problems of over-spraying, excessive residues, and environmental pollution. Methods: Foliage area volume density (FAVD), as it represents the number of pesticide targets in the canopy, can be used as a decision condition for variable spraying. Based on the previous FAVD detection method, this study developed a small target-variable sprayer based on FAVD, constructed a FAVD-spray rate control model, and conducted orchard experiments. Results: The experiment results showed that the targeted variable spray (TV) mode significantly improved deposition uniformity, and reduced ground loss and water consumption. For the TV model, the longitudinal variation coefficient was 11.42%, and the lateral variation coefficients were 55.27% (top layer), 58.80% (middle layer), and 43.15% (bottom layer), respectively. For the NTIV model, the longitudinal variation coefficient is 32.15%, and the lateral variation coefficients were 96.19% (top layer), 62.69% (middle layer) and 57.19% (bottom layer) respectively. In terms of ground and behind-canopy losses, the TV model reduced 79.78% and 73.54%, respectively, and saved 64.50% of water consumption. Discussion: Compared with the NTIV model, the TV model has small longitudinal and lateral coefficients of variation, the loss...