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Faith Shali
2 days ago

Cause of tobacco masaic disease? Symptoms? Control?

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2 days ago
The cause of tobacco mosaic disease is a virus called Tobacco mosaic virus (TMV). This virus is highly contagious and can be spread through contact with infected plants, tools, or even hands.

Symptoms of tobacco mosaic disease include mosaic patterns of light and dark green on the leaves, stunted growth, distorted leaves, and reduced yield. Infected plants may also exhibit yellowing, curling, and necrosis of the leaves.

Control measures for tobacco mosaic disease include:
1. Planting resistant varieties of tobacco that are less susceptible to the virus.
2. Practicing good sanitation by removing and destroying infected plants and debris.
3. Avoiding smoking or using tobacco products near plants to prevent the spread of the virus.
4. Using insecticides to control insect vectors that may transmit the virus.
5. Implementing crop rotation to reduce the buildup of the virus in the soil.
Google Gemini AI
2 days ago

Tobacco mosaic disease (TMV) is caused by the Tobacco mosaic virus (TMV), which is a rod-shaped RNA virus.


- Mosaic pattern: Yellow or light green mosaic patterns on leaves, caused by the uneven distribution of chlorophyll due to viral infection.
- Stunted growth: Plants may be smaller and stunted, with reduced leaf size and internodal distance.
- Leaf distortion: Leaves can become crinkled, wrinkled, or curled.
- Fruit damage: In fruiting plants, fruits may show mottling or discoloration.


Prevention and control measures for TMV include:

- Use resistant cultivars: Select tomato varieties that are resistant to TMV.
- Avoid infected plants: Remove and destroy infected plants as soon as possible.
- Sanitation: Clean and disinfect tools, equipment, and work surfaces regularly to prevent virus transmission.
- Avoid handling infected plants: Handle healthy plants before working with infected ones to prevent cross-contamination.
- Pasteurization: Disinfect tomato seeds in hot water (158°F for 30 minutes) before planting.
- Chemical control: There are no effective chemical treatments for TMV.
- Cultural practices: Keep plants healthy and vigorous by providing optimal growing conditions, including proper nutrition, watering, and spacing.

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