新乐是河北省西瓜种植大市,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,现将新乐市西瓜主要病虫种类及防治方法介绍如下:一、病害防治猝倒病症状:幼 New music is watermelon cultivation in Hebei 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 watermelon diseases and pests. Now we introduce the main pests and diseases of watermelon in Xinle City and the prevention and cure methods as follows: