How do you prevent TYLCV?
To prevent TYLCV spread or management, the following approach is recommended: (1) virus- and whitefly-free transplants should be planted, (2) insecticides or insect repellents for whiteflies should be used to reduce whitefly feeding and virus transmission, (3) TYLCV-infected and TYLCV-infected-looking tomatoes should …
How is TYLCV transmitted?
TYLCV was transmitted from viruliferous males to females and from viruliferous females to males but not among insects of the same sex. Transmission took place when insects were caged in groups or in couples, in a feeding chamber or on cotton plants, a TYLCV nonhost.
What does mosaic virus do?
THE TOBACCO MOSAIC VIRUS Tobacco mosaic virus causes a mottled browning of tobacco leaves, and accordingly is of major economic importance. It also infects other crops, most notably tomatoes. The virus is spread mechanically from infected plants to scratched or damaged leaves of normal plants.
What causes curling leaves on tomato plants?
High winds, blowing dust and low humidity can damage the leaves and stems on tomato plants. Heat and low moisture can cause the edges of the tomato leaves to die back, then twist and curl. Hot dry weather may also cause a symptom called physiological leaf roll.
How do you get rid of the yellow leaf curl on tomatoes?
Rogue tomato or pepper plants with early symptoms of TYLCV can be removed from fields by placing infected-looking plants in plastic bags immediately at the beginning season, especially during first three to four weeks. Maintain good weed control in the field and surrounding areas.
What causes leaves on tomatoes to turn yellow?
The most common reason why the leaves on established tomato plants turn yellow is a lack of nutrients in the soil. Tomatoes are extremely heavy feeders and require plenty of nutrients to grow healthy and be fruitful. Signs of nutrient deficiency often start low on the tomato plant.
What does it mean if tomato leaves curl?
When tomato leaves are curling downward, this normally is the result of a lack of nutrients due to root rot. Root rot occurs when overwatering causes the plant to stop water uptake. The roots of the plant will contract and close to halt water uptake to prevent the plant from dying.
Does mosaic virus stay in soil?
Unlike TMV (tobacco mosaic virus), CMV is not seedborne in tomato and does not persist in plant debris in the soil or on workers’ hands or clothing. The occurrence of this virus is erratic and unpredictable; consequently, control of this disease can be difficult.