A severe outbreak of melon yellow mosaic disease caused by Zucchini yellow mosaic virus in the Punjab province of Pakistan

摘要

In 2003 a serious disease of muskmelon (Cucumis melo)appeared in commercial fields in the Punjab,Pakistan.Symptoms of the disease were characteristically chlorosis,leaf curling and deformation,vein clearing and the formation of leaf-like outgrowths on the upper leaf surface of some leaves.The disease led to almost 100% loss of the crop in some areas and was present again in 2004,with a similar phenotype and losses.