条件筛选
-
Rice seedling-stage diseases require careful prevention and control, especially during periods of abnormal temperatures
Seedling-stage diseases are the general term for various physiological and infectious diseases during rice seedling raising, also called seedling rot. Physiological seedling rot refers to symptoms such as seed rot, bud rot, black root, greens wilt and yellow wilt death of seedlings caused by adverse environmental conditions; infectious seedling rot refers to seedling death symptoms caused by the harm of cottony leak and damping-off. During the seedling-raising period in northern rice regions, low temperatures and cold wave weather strikes are common, and the annual incidence rate of seedling rot disease is 10%~23%. Symptom characteristics 1. Physiological seedling rot: 1. Seed rot, refers to seeds rotting before germinating