It is also a problem in many countries that have a Mediterranean climate such as California. Tomato plant leaves respond to various stresses by rolling or curling up. It causes leaves to twist and curl, and is transmitted between plants by the whitefly. Leaves may curl up when a plant gets a virus. The stress could either be environmental, biological or chemical related. Viral Infection. Photo by D. Ferrin, LSU AgCenter, Bugwood.org. Unfortunately, there is no cure for TLCV, so the only answer is removing infected … Virus-infected plants often show other symptoms of a problem. Leaflets are also smaller than those of healthy plants. It is caused by whitefly infestations on the tomato plants. Phew! Tomato Yellow Leaf Curl Virus. Tomato yellow leaf curl virus is undoubtedly one of the most damaging pathogens of tomato, and it limits production of tomato in many tropical and subtropical areas of the world. What Are The Symptoms of Tomato Leaf Curl: The leaf curl is more common in indeterminate tomato varieties. Symptoms on the leaves include interveinal yellowing, upward and downward curling and crinkling. Control is similar to early blight. A bush variety or the determinate tomato variety is at a lower risk of getting leaf curl. Symptoms of tomato yellow leaf curl in a tomato. The plant becomes stunted, and leaflets curl and grow increasingly smaller, exhibiting a puckered appearance. According to Wikipedia, tomato yellow leaf curl virus is found in tropical and subtropical regions. Remedies for leaf curl in tomato plants ( Lycopersicon esculentum ) depend on the cause of the curling leaves.Tomato yellow leaf curl virus is one possible cause, but your tomato growing practices could also cause the leaves to curl. One way to prevent the spread of this virus is through the use of insecticides. Symptoms in tomato plants are the upward curling of leaves, yellow (chlorotic) leaf margins, smaller leaves than normal, plant stunting, and flower drop. Leaf curl can be quite frustrating to deal with as multiple conditions can cause it or a combination of any and the only way to deal with it is by identifying the exact cause. If tomato plants are infected early in their growth, there may be no fruit formed. Thus, the spread of the virus throughout California must be considered as a serious potential threat to the tomato industry. The curl starts at the leaves that are at the lower position. You have to take precautions after finding out the main cause of the leaves rolling. 03: Leaf rolling or curling . Tomato leaf curl is often an environmental change due to stress. This may occur for physiological condition, a side effect of herbicides or viral attack. With no other symptoms of disease, no treatment is necessary. The tomato leaf curl virus (ToLCV) can attack tomato plants. Often appearing on plants grown under intense light, there is no cause for concern or need for treatment of purple tomato leaves. Tomato leaf curling and rolling is a common matter for tomato gardener. Whiteflies and aphids (Figure 6) both cause leaf yellowing and leave a characteristic sticky excrement called honeydew. Then it cups upwards and then starts to roll inwards. Infected plants may appear randomly throughout the garden. Tomato Leaf Curl Virus (TLCV) is a disease that causes tomato plants to wither, stop growing fruit, and eventually die. Whiteflies cause this disease and help it to spread from plant to plant. Tomato yellow leaf curl (virus: tomato yellow leaf curl virus , TYLCV) is one of the most devastating virus diseases of tomatoes, and total yield loss has been reported when vector populations were high. Purple leaves are caused by expression of anthocyanin due to light exposure. 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