Symptoms: The diseased leaves are mottled with thick green and light green, the leaves are shrunk, the internodes are short, and the plants are dwarfed; the diseased loofah is thick, pale green and mottled, the thick green part is often protruding, and the diseased fruit is deformed;

Incidence conditions: The weeds in the melon fields or the melons in the vicinity of the melons are mixed with a large number of aphids to cause pathogen infection. Extensive field management, lack of fertilizer, and lack of water will increase the incidence of disease.

Control methods: strengthen field management, timely cultivating and weeding, weeds should be removed in time; do well in water and fertilizer management, timely topdressing, improve plant disease resistance; spray new high-fat film 800 times liquid, keep warm and moisturize, inhibit the spread of bacteria At the same time, do a good job in the prevention and control of mites, reduce the spread of the virus; if the diseased field has to use the targeted agent as soon as possible to spray control.