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

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%

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

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

TOBACCO MOSAIC VIRUS

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

Thank You