Watermelon Virus Disease Symptoms and Control Methods
Here are some small experiences in green plant maintenance about the symptoms and control methods of watermelon virus disease, please see the detailed introduction below.
Watermelon Virus Disease Symptoms and Control Methods
Watermelon virus mainly manifests as two symptoms in the field: mosaic and fernleaf. The first is mosaic, where the top leaves initially show yellow-green mosaic patterns, and the second is fernleaf, where new leaves become narrow and long, with wrinkled and twisted shapes. To control watermelon virus disease, it is necessary to spray the plants with 500 times the amount of carbendazim or 800 times the amount of methyl thiophanate during the seedling stage, followed by a thorough spray of 1:1 240-fold equal-volume Bordeaux mixture after the vines start to stretch, and then a spray of 1:1 200-fold equal-volume Bordeaux mixture after fruit setting.
Watermelon Virus Disease Symptoms
Watermelon virus mainly manifests as two symptoms in the field: mosaic and fernleaf. The first is mosaic, where the top leaves initially show yellow-green mosaic patterns, then become wrinkled and deformed, with uneven leaf surfaces, few or no fruits set. The second is fernleaf, where new leaves become narrow and long, wrinkled and twisted, with slow growth.
Damage Caused by Watermelon Virus Disease
The growth of watermelon plants is slow, the flower organs are underdeveloped, severe cases fail to set fruit, and late-infected plants form deformed fruits with uneven surfaces, small size, and dark brown flesh, which greatly affects the yield and quality of watermelon.
Causes of Watermelon Virus Disease
The causes of watermelon virus disease include high temperature, strong sunlight, and dry weather, which are conducive to the reproduction and migration of aphids and the spread of the virus. Water and fertilizer deficiencies, extensive management, untimely pest control, and greenhouses near virus sources are severely affected. The virus is mainly transmitted through seed-borne bacteria and aphid sap.
What Medication Works Best for Watermelon Virus Disease
To treat watermelon virus disease, it is recommended to use 40% dimethoate 1000 times liquid, control once every 5-7 days, and continue for 2-3 times. In summer, when the field humidity is high and weeds are abundant with a concentrated number of aphids, use 5% resistance to aphid wettable powder 2000 times liquid, control once every 7-10 days, and continue for 2-3 times.
Special Medication for Treating Watermelon Virus Disease
Medication should be applied at the early stage of watermelon virus disease. Commonly used agents include 20% virus A wettable powder 500 times liquid, 1.5% plant disease terminator emulsion 1000 times liquid, and antivirus agent No. 1 300 times liquid, alternating medication, controlling once every 7-10 days, and continuing for 2-3 times.
Watermelon Virus Disease Control Methods
To prevent and control watermelon virus disease, it is necessary to spray the plants with 500 times the amount of carbendazim or 800 times the amount of methyl thiophanate during the seedling stage, about once every 10 days, then use 1:1 240-fold equal-volume Bordeaux mixture after the vines start to stretch, about once every 10-15 days, and then use 1:1 200-fold equal-volume Bordeaux mixture after fruit setting, about once every 15 days.
The above sharing of the full content of symptoms and control methods of watermelon virus disease, hoping to help you, and at the same time, I hope everyone comes to see more green plant and flower experience knowledge!