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Studies on Seed Transmission of Tobacco Streak Virus Causing Sunflower Necrosis Disease
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Sunflower necrosis disease caused by Tobacco streak virusposes potential threat to the cultivation of sunflower in India. The early infection kills entire plant and the disease appears as necrosis of leaves, petiole, stem, bracts and malformation of head. TSV has wide host range and it is transmitted by vector through infective pollen. In the present study, transmission of TSV by seed was ruled out, since no seed transmission was recorded with the seeds of sunflower cultivars (Morden, DRSF-108, KBSH-1, KBSH- 41, KBSH- 44, KBSH- 53, Sunbred- 275, DRSH-1, ASF-107 and RSF-101) collected from necrosis infected plants in grow-out test. However, reduction in germination percentage from seeds of diseased plants was noticed as compared to healthy seeds.
Keywords
Sunflower Necrosis Disease, Seed Transmission, Grow-out Test
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