Which virus affects the leaf of tobacco?
Which virus affects the leaf of tobacco?
Tobacco mosaic virus (TMV) is a positive-sense single-stranded RNA virus species in the genus Tobamovirus that infects a wide range of plants, especially tobacco and other members of the family Solanaceae.
How is TMV transmitted?
The most important way that TMV can be spread from plant to plant is on workers’ hands, clothing or on tools. This is called ‘mechanical’ transmission. When plants are handled, the tiny leaf hairs and some of the outer cells inevitably are damaged slightly and leak sap onto tools, hands, and clothing.
How can we prevent the spread of tobacco mosaic virus?
To control the spread of TMV, farmers must: wash their hands after handling infected plants. wash tools that have come into contact with infected plants in detergent or bleach. rotate the crops they grow in a contaminated field – they must not grow tobacco or tomato plants in the field for at least two years.
What kind of virus does tobacco leaf curl have?
Tobacco leaf curl Cuba virus infects the weed Malachra alceifolia in Jamaica. Plant Pathology, 57 (2):398. http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3059
Why are the leaves curling on my tobacco plants?
In tobacco, TLCV causes stunting; the stems are twisted and the leaves are small, curled, twisted and puckered, often with green thickenings or enations along the veins. In tomatoes, the virus causes curling, yellowing and puckering of the leaves.
Is there a tomato yellow leaf curl virus?
Tomato yellow leaf curl virus in Thailand and tobacco leaf curl virus in Japan are serologically identical. Annals of the Phytopathological Society of Japan, 57 (4):595-597 Cohen S; Harpaz I, 1964. Periodic, rather than continual acquisition of a new tomato virus by its vector, the tobacco whitefly (Bemisia tabaci Gennadius).
What kind of disease does tobacco plant have?
Rhizoctonia solani causes two types of diseases on tobacco seedlings in greenhouses: Target spot. Symptoms on leaves begin as small, round, water-soaked spots about 2-3 mm in diameter. Under favorable conditions these lesions enlarge rapidly, becoming light green, almost transparent, with irregular margins and chlorotic halos.