A growing and promising sector of precision agriculture is the site-specific application of pesticides, having a high potential for reductions in pesticide use. Within the research project ‘AssSys’, site-specific pesticide applications with a direct injection sprayer system and an automatic application assistant were evaluated economically with respect to herbicide and fungicide applications. The application assistant aims to support farmers in decision-making and implementation of site-specific pesticide applications either in the planning stage or as ex-post analysis. The economic assessment was based on field trials and scenario analysis referring to a model farm. The field trials were conducted in 2018 and 2019 in northern Germany. In the scenario analysis, two site-specific application scenarios were compared to conventional uniform treatment (100% of the field area). Weed monitoring was conducted as (1) standard procedure according to integrated pest management, (2) camera-based and (3) drone-based in the field trials. The pesticide application costs include pesticide costs, labour and machine costs of monitoring and pesticide applications. Investment costs of the necessary technical equipment for site-specific applications were included as annual labour and machine costs. As a major key performance indicator of partial budgeting at field level, extended gross margins were calculated. The economic scenario analysis showed pesticide application cost savings from 26 to 66% for site-specific applications compared to conventional applications. The average extended gross margin for site-specific applications of 787 € ha⁻¹ compared to 631 € ha⁻¹ for conventional application showed a clear economic advantage of the site-specific application scenarios. Site-specific pesticide applications can support farmers in implementing precise, sustainable and economically beneficial pesticide management. The technology presented may contribute to meet the goals of the European Green Deal to reduce use and risks of pesticides.

精准农业中一个不断发展且前景广阔的领域是农药的特定地点应用，具有减少农药使用的巨大潜力。在研究项目“AssSys”中，针对除草剂和杀真菌剂应用的直接喷射喷雾器系统和自动应用助手的特定地点农药应用进行了经济评估。应用助手旨在支持农民在规划阶段或作为事后分析的特定地点农药应用的决策和实施。经济评估基于田间试验和参照模型农场的情景分析。现场试验于 2018 年和 2019 年在德国北部进行。在情景分析中，将两个特定场地的应用场景与传统的均匀处理（100% 的场地面积）进行了比较。杂草监测是作为（1）根据综合害虫管理的标准程序，（2）基于相机和（3）基于无人机的田间试验进行的。农药施用成本包括农药成本、监测和农药施用的人工和机器成本。用于特定地点应用的必要技术设备的投资成本包括在年度劳动力和机器成本中。作为现场一级部分预算编制的主要关键绩效指标，计算了扩展毛利率。经济情景分析表明，与常规施用相比，针对特定地点的施用可节省 26% 至 66% 的农药施用成本。^-1与传统应用的 631 欧元公顷相比^-1显示了特定地点应用场景的明显经济优势。特定地点的农药施用可以支持农民实施精确、可持续和经济有益的农药管理。所提出的技术可能有助于实现欧洲绿色协议的目标，以减少农药的使用和风险。