Sunflower mosaic virus (SMV)
Symptom:
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Several kinds of symptoms have been described from India. Mosaic symptoms accompanied by ring spots or chlorotic spots which had a tendency to coalesce have been frequently reported.
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Another mosaic virus described as mosaic and chlorotic rings that were more common on young leaves which make the plants stunted, producing malformed heads and shrivelled seeds.
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Symptoms as small circular spots on leaves which coalesced to form typical mosaic pattern, cupping and malformation of leaves have also been reported.
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Sunflower mosaic virus is reported to be mechanically sap transmitted and also by several aphid vectors.
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The important vectors are Aphis gossypii, A.craccivora, A.malvae, Rhopalosiphum maidis in a non-persistant manner, both under laboratory and natural field conditions.
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The host range of this virus ranged from narrow, infecting only the cultivars of sunflower to as many as more than 25 plant species belonging to different families.
Source-
- TamilNadu Agritech Portal
