How do you control leaf curl virus in tomatoes?
How do you control leaf curl virus in tomatoes?
Chemical control: Imidacloprid should be sprayed on the entire plant and below the leaves; eggs and flies are often found below the leaves. Spray every 14-21 days and rotate on a monthly basis with Abamectin so that the whiteflies do not build-up resistance to chemicals.
How do I get rid of tomato leaf curl?
Irregular irrigation and improper pruning cause the leaf edges to roll inward, sometimes to the point of overlapping. When most of the leaves on the plant are affected by this condition it may look serious, but it is not permanent. The remedy is deep, even watering on a regular basis and careful pruning.
What causes tomato leaf curl virus?
This type of leaf curl is thought to be a reaction to environmental stress. Causes for the stress vary from excessive moisture and/or nitrogen, high temperatures, insufficient water, severe pruning, or root damage of some type. In the case of physiological leaf curl, symptoms occur first on the lower, older leaves.
What virus causes tomato yellow leaf curl virus?
Tomato yellow leaf curl virus is a species in the genus Begomovirus and family Geminiviridae. Tomato yellow leaf curl virus (TYLCV) infection induces severe symptoms on tomato plants and causes serious yield losses worldwide. TYLCV is persistently transmitted by the sweetpotato whitefly, Bemisia tabaci (Gennadius).
How do you prevent yellow leaf curl in tomatoes?
Maintain good weed control in the field and surrounding areas. Prevent the spread of any whiteflies to healthy plants. Tomato and pepper fields should be cleaned up immediately after harvest. Also destroy crop residues of melons and cotton immediately after harvest to reduce whitefly migration.
Why are my tomato leaves curling and twisting?
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. This is a self defense response, where leaves and leaflets curl slightly to prevent further water loss (Fig.
How does Tomato yellow leaf curl virus spread?
Spread of TYLCV TYLCV is transmitted from diseased to healthy plants by silverleaf whitefly (Bemisia tabaci), which feeds on a wide range of hosts (Figure 2). Levels of TYLCV can be correlated to the population size of its vector silverleaf whitefly. It is not known if native whiteflies can spread the virus.
What are the symptoms of leaf curl?
Symptoms of leaf curl appear in the spring. Developing leaves become severely distorted (thickened and puckered), and have a reddish or purple cast. Later, as spores form on the leaf surface, the leaves become powdery gray in color. Shortly after this, the leaves turn yellow or brown and drop.