西瓜、甜瓜、黄瓜等瓜类作物是西北各省区的重要果菜，其中新疆的西瓜、哈密瓜，甘肃的白兰瓜，都是重要的出省、出口产品。近几年，由于真菌、病毒的侵害，瓜的产量和品质受到严重影响，经济损失很大。为了做好瓜类的防病治病工作，新 Watermelons, melons, cucumbers and other melons crops are important fruits and vegetables in the northwest provinces and regions, including Xinjiang watermelon, cantaloupe, Gansu Bailan melons, are important out of the province, export products. In recent years, due to fungal and viral infections, the output and quality of melon are seriously affected, resulting in great economic losses. In order to do a good job of prevention and treatment of melons, new