There is a disease called chlorotic yellowing disease that infects cucumbers, melons, watermelons and other gourd family. The initial symptom is that the leaves are mottled with small spots, and when the spots spread over time, the entire surface turns yellow.
It is known that the virus is carried by tobacco whiteflies. Therefore, in order to prevent this disease, it is important not to let tobacco whiteflies in the facility, not to increase or spread the population of the whiteflies.
Cucurbit yellowing virus (CCYV) is a plant virus that was newly confirmed in Japan in 2007. CCYV is classified as a new species of closterovirus mediated by tobacco whiteflies. To date, infections with cucumbers, melons, and watermelons have been confirmed. In infected plants, small chlorotic spots and small yellow spots develop, and they gradually expand to yellow leaves. As a result, cucumbers can reduce fruit yields by up to 30%, and melons can cause significant reductions in fruit weight and sugar content. In addition, gangrene occurs in watermelon from the periphery of the yellowed leaves or between veins, and if the symptoms are severe, the leaves die. Since CCYV is mediated by tobacco whitefly biotype Q and biotype B, it is important that not to enter the facility, not to increase or spread the population of tobacco whiteflies. Early detection and removal of infected strains is essential to prevent the spread of healthy strains.
A diagnostic kit that detects Cucurbit chlorotic yellows virus.
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