Melon necrotic spot virus

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symptoms of Melon necrotic spot virus infection on older leaves
Source: BioSciences BA - Wikimedia Commons

Melon necrotic spot virus (MNSV)

This virus is widely distributed and infects melon and other cucurbits. The symptoms consist of necrotic lesions on the leaves and infections of melon plants can result in significant yield losses. MNSV is naturally transmitted through seeds with the assistance of fungi. It can be also mechanically transmitted.

The virus particles are icosahedral and 30 nm in diameter. The genome consists of a positive-sensed, single-stranded RNA with a length of 4267 nt and at least five open reading frames.