论文部分内容阅读
近年来,冬季棚栽黄瓜病害的种类逐年增多,给黄瓜生产带来不同程度的损害,现介绍三种病虫害的症状及防治经验:细菌性角斑病:发病初期为鲜绿色水浸状斑,逐渐变为淡褐色,病斑受叶脉限制呈多角形、灰褐或黄褐色,湿度大时叶背溢有乳白色
In recent years, the varieties of winter shed cucumber diseases increased year by year, to cucumber production to varying degrees of damage, are introduced three kinds of pests and diseases and prevention and treatment experience: Bacterial angular leaf spot disease: early onset of fresh green flooding spots, Gradually becomes light brown, lesions are polygonal by the veins, gray brown or yellow brown, when the humidity is large leafy spill