Surveillance of Cassava Frogskin Disease in Cassava Plantations in Meta, Colombia

This dataset contains field monitoring data of Cassava Frogskin Disease collected in Meta, Colombia. Each record includes geographic coordinates (latitude and longitude), administrative information (department and municipality), date of sampling, and visual assessment indicating the presence or absence of disease symptoms on cassava roots. Methodology: For a population of 10,000 with an estimated infection rate of 10%, using a sample size of 30 plants provides a 95% probability of detection. The monitoring focuses on cassava crops older than seven months, specifically selecting one hectare with well-formed storage roots. Within the hectare, two transects of 15 plants each are chosen, totaling 30 plants per hectare. To inspect the roots, soil is carefully removed using a machete until a good storage root is exposed. The root is then cleaned gently with a clothes brush, and if necessary, washed with water using a 6-liter sprayer. Once the skin of the root is clearly visible, a photo is taken following specific guidelines: location services and camera location tags must be enabled, flash is turned off, AI focus and lighting correction are activated, and image size is set to a maximum of 1 MB. The photo should be taken approximately 15 cm away from the root to ensure clear visibility of potential frogskin disease symptoms.

本数据集收录了在哥伦比亚梅塔省（Meta）采集的木薯蛙皮病（Cassava Frogskin Disease）田间监测数据。每条记录包含地理坐标（纬度与经度）、行政归属信息（所属省与市县）、采样日期，以及用于指示木薯块根是否存在病害症状的视觉评估结果。研究方法：针对预估感染率为10%的10000株木薯种群，选取30株作为样本量时，可获得95%的病害检出概率。本次监测聚焦于种植时长超过7个月的木薯作物，专门选取1公顷块根发育完善的地块开展工作。在该地块内设置两条样带，每条样带选取15株木薯，单地块总计采样30株。为检视块根，需使用砍刀小心移除周围土壤，直至完整的贮藏块根露出。随后用衣物刷轻柔清洁块根，必要时可借助6升容量的喷雾器用水冲洗块根。待块根表皮清晰显现后，需遵循特定规范拍摄照片：需开启定位服务与相机位置标签功能、关闭闪光灯、启用AI对焦与光线校正功能，并将图像大小设置为不超过1MB。拍摄时需将相机距块根约15厘米，以确保可清晰识别潜在的蛙皮病症状。