新乐是我省西瓜种植大市,特别是大棚西瓜这几年发展很快。但大棚西瓜连年重茬种植,导致病虫种类越来越多,危害程度越来越重。为了解决这一生产突出问题,我们在西瓜主要病虫害防治上进行了实验与探索,现将西瓜主要病虫种类及防治方法介绍如下:一、病害防治1、猝倒病。幼苗出土前烂芽,或出土后胚轴近地面处出现水渍状病斑,以后变黄缢缩,幼苗倒伏。病情发展很快,可造成大片幼苗死亡,在高温高湿下,被害幼苗表面及附近土表布满一层白 New music is watermelon cultivation in our province, especially in the greenhouse watermelon developed rapidly in recent years. However, planting perennial watermelon continuous cropping, resulting in more and more types of pests and diseases, more and more serious damage. In order to solve this outstanding problem of production, we have carried out experiments and exploration on the prevention and control of major pests and diseases of watermelon. Now we introduce the main pests and diseases of watermelon and the prevention and cure methods as follows: I. Disease Prevention and Control 1, Damp down disease. Seedlings out of the former rotten buds, or unearthed hypocotyl near the surface water stain-like lesions, yellowing after shrinking, seedling lodging. The rapid development of the disease, can cause large-scale seedlings died, under high temperature and humidity, the surface of the seedlings and nearby soil covered with a layer of white