Apple Maggot Pheno Forecast, Contiguous United States, 2016 - Current Year

Pheno Forecast maps predict key life cycle stages in a range of species to improve conservation and management outcomes. For insect pest species, Pheno Forecasts are based on published growing degree day (GDD) thresholds for key points in species life cycles. These key points typically represent life cycle stages when management actions are most effective. These maps are updated daily and available 6 days in the future. We forecast adult emergence in apple maggot (Rhagoletis pomonella) at 900-1200F growing degree days (base 50F, start date: March 1, simple average GDD method). Forecasts are available for the current and prior year in the USA-NPN Visualization Tool (https://www.usanpn.org/data/visualizations) and 2016-present through USA-NPN Geo Web Services (available upon request). Apple maggot larvae cause damage to ripening fruit and are best controlled when adults begin to emerge. For all inquiries regarding this dataset, please contact the USA-NPN. This data is subject to the USA-NPN's Data Use Policy.物候预测图（Pheno Forecast）可对多类物种的关键生命周期阶段进行预测，以优化保护与管理成效。针对昆虫害虫物种，物候预测基于已发表的物种生命周期关键节点的积温（growing degree day, GDD）阈值。这些关键节点通常对应管理措施可发挥最优效果的生命周期阶段。该类图件每日更新，并可提供未来6天的预测结果。 我们基于900~1200华氏度的积温（基准温度50华氏度，起始日期为3月1日，采用简单平均积温法），对苹果实蝇（Rhagoletis pomonella）的成虫羽化期进行预测。当前年份与过往年份的预测结果可通过美国国家物候网（USA-NPN）可视化工具（https://www.usanpn.org/data/visualizations）获取；2016年至今的预测数据则可通过美国国家物候网地理网络服务获取（需提交申请）。 苹果实蝇幼虫会对成熟果实造成危害，且在成虫开始羽化时开展防治效果最佳。若需咨询该数据集相关事宜，请联系美国国家物候网（USA-NPN）。本数据集须遵守美国国家物候网的数据使用政策。