This PPT includes introduction, symptoms, causal agenT and management of Tobacco Mosaic Virus Disease

1. TOBACCO MOSAIC
DR. RAJBIR SINGH
Assistant Professor
Department of Plant Pathology
Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India
Affiliated to Ch. Charan Singh University, Meerut (UP), India
Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com
Cell No. 91-9456613374

2. Tobacco Mosaic
• All over the world
• All states of country
• 150 spp. affected, Tobacco, tomato, potato, brinjal etc.
• Most destructive in tobacco & tomato
• Quality & quantity reduced
• Quality loss – till 33%
• Quantity loss –till 50%

3. Symptoms :
• First appear on new leaves
• Mottling
• Greening & yellowing of leaves
• Green parts - normal growth
• Yellow parts – growth stop
• Result – green parts form pits
• If infection in early stage - leaf twist & malformed
• Old leaves – yellow parts – brown
• Partial sterility in pollens

12. Pathogen – Tobacco mosaic virus /
Nicotiana virus 1
• Rod shaped
• Size – 300 nm long
• Diameter – 15 -18 nm
• Sap transmissible – by wounds
• Seed transmission in tomato but not in tobacco
• No insect vector is known
• Mechanical transmission

13. TOBACCO MOSAIC VIRUS

14. Disease Management
• Removal of crop resides & infected plants
• Removal of solanaceous weeds
• Crop rotation of 2 years
• Wash hand with Trisodium phospate
• Wash agril. equipments in Trisodium phospate
• No smoking
• Disease resistant varieties- Ambalema

15. Thank You