Melon necrotic spot virus

Melon necrotic spot virus (MNSV) is a virus that belongs to the genus Gammacarmovirus (split from formerly Carmovirus) of the family Tombusviridae. It has been observed in several countries in the Americas, Africa, Asia, and Europe. It is considered to be an endemic virus in greenhouses and field productions of Cucurbitaceae crops, including melon (Cucumis melo), cucumber (Cucumis sativus), and watermelon (Citrullus lanatus). MNSV is mainly spread through infected soil, seedlings, insects, and by the root-inhabiting fungus vector Olpidium bornovanus Symptoms vary between Curbitaceae crops, but generally consist of chlorosis, brown necrotic lesions, leaf wilt, fruit decay, and plant death. Management of the disease consists of preventing infection by rotating fields and crops, steam sterilization, and disposal of infected plants. Also, treated seeds with heat or chemicals are efficient in preventing infection. MNSV is important in melon plants as it causes vast economical damage worldwide reducing significant yields.

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