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黄瓜是上海夏季的主要瓜菜之一,我县常年种植1700亩左右。近几年来,随着复种指数的提高和耕作管理的改变,黄瓜病害特别是疫病、枯萎病的威胁越来越大。为了夺取黄瓜丰收,满足城市人民的需要,现将黄瓜病害的种类及其防治方法分述如下: 一、病害的种类 1、苗期病害:分生理性倒苗和病理性倒苗两种。前者主要是由于低温、阴雨、下雪和冷风的侵袭而引起的,这类例苗发生于播种后刚出苗(奶叶未展开)和放真叶时期。病理性倒苗是
Cucumber is one of the main melons in summer in Shanghai. The county planted about 1700 mu perennial. In recent years, with the improvement of multiple cropping index and the change of cultivation and management, cucumber diseases, especially blight and wilt disease, are threatened more and more. In order to seize the cucumber harvest, to meet the needs of urban people, now cucumber disease types and prevention methods are described as follows: First, the type of disease 1, seedling diseases: sub-physiological and inverted inverted disease pathomorphology two. The former is mainly caused by the invasion of low temperature, rainy weather, snowing and cold winds. Such seedlings occurred after the emergence of young seedlings (no development of milk leaves) and leaves of true leaves. Pathological inverted seedling is