Groundnut bud necrosis virus

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groundnut bud necrosis symptoms on tomato (click on image to enlarge it)
Author: Rakesh Kumar
Source: APSnet

Groundnut bud necrosis tospovirus (GBNV)

This virus is found in southern Asia and is of quarantine concern in other regions. It causes peanut bud necrosis and bud blight of soybean. Various other crops like tomato or cowpea can also become infected. In tomatoes and groundnuts, the disease incidence and the yield losses can surpass 50%. Several thrips species like Thrips palmi are known to transmit the virus in a circulative and propagative manner.

Infected groundnuts show initially chlorotic spots on the young leaves. Subsequently, necrosis develops on the leaves, including the terminal bud. The symptoms on infected tomato plants are necrotic patches and rings on the leaves as well as the stems, followed by wilting of the whole plants. Tomato fruits show diffuse, yellowish patches.

Like in other tospoviruses, the particles of GBNV are approximately spherical with a diameter of around 100 nm. The genome consists of three single-stranded RNA molecules which are named S, M and L for small, medium and large.

Vernacular names
• English: Groundnut bud necrosis virus
bud blight of soybean

peanut bud necrosis virus