西瓜、甜瓜病毒病有发展的趋势，尤其是甜瓜发病更为严重。此病的发生，不仅使瓜田减产，而且降低果实品质。尽管有新药问世，但防治效果仍不够理想。近年我们在瓜农中推广综合防治，摸索出几个化学药剂复配配方和施药方法，取得了较为理想的防效。一、危害症状：在大田一... Watermelon, melon virus disease development trend, especially melon incidence more serious. The occurrence of the disease, not only cut melon field, but also reduce fruit quality. Despite the advent of new drugs, the effect of control is still not satisfactory. In recent years, we promote the comprehensive prevention and control in the melon farming, worked out several chemical compound formula and application methods, and achieved a more satisfactory control effect. First, the danger of symptoms: one in the field ...