近年来,随着种植业结构的调整,上杭县临城镇春、秋苦瓜面积逐年扩大,病虫害也呈逐年加重趋势。据调查,为害本镇苦瓜生产的主要有“三病三虫”。现将其发生时期和防治方法总结介绍如下。1霜霉病本镇春苦瓜受该病为害主要在5月初至7月初,秋苦瓜主要在9月至10月。防治上抓住发病初 In recent years, with the adjustment of planting structure, the area of ​​spring and autumn balsam pear trees in Lincheng Town of Shanghang County has been expanded year by year, and the pests and diseases have also been increasing year by year. According to the survey, the main cause of the production of bitter melons in the town are “three diseases and three insects.” Now its occurrence and prevention methods are summarized below. 1 downy mildew The town of spring bitter melon affected by the disease mainly in early May to early July, autumn bitter melon mainly in September to October. Prevention and control to catch the onset