Once it curls, it will most likely not straighten itself out. Symptoms include stunting and distortion of foliage, mottling and streaking of stems and leaves. 235-7. You can first detect this fungus as it creates a small, circular spot with a grayish-white center and dark edges. Tomato Plant Disease: Septoria Leaf Spot. Tomato leaf roll. The stress could either be environmental, biological or chemical related. If it is verticillium wilt, how long will it persist in the soil? ACKNOWLEDGMENTS Whiteflies cause this disease and help it to spread from plant to plant. Viral Infection. → Virus-infected plants often show other symptoms of a problem. Tomato Viruses | Mosaic, Leaf curl. On a positive note, it may not be pretty but at least it … Moulds, mildews on tomatoes The leaves fold up and in from the certain of the leaf vein (making sort of a mini-taco appearance). "Curl", curling from leaf tip toward the stem, even though some use the terms interchangeably is usually associated with a tomato disease and that is not what you have. Spread in many ways, including sap-sucking insects, garden tools, hands, implements, even old trellises. Small black spots may show up in the center. Often appearing on plants grown under intense light, there is no cause for concern or need for treatment of purple tomato leaves. Phew! According to Wikipedia, tomato yellow leaf curl virus is found in tropical and subtropical regions. First, the Grosse Lisse, then the Burnley Surecrop and now the Romas have all succumbed. As I mentioned on your other post, It is called 'tomato leaf roll'. A In the pics you sent … Continue reading Q&A: What’s killing my tomatoes? One way to prevent the spread of this virus is through the use of insecticides. 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. Purple leaves are caused by expression of anthocyanin due to light exposure. Affected tomato plant leaves turn yellow, wither, and fall off. Tomato leaf curl is often an environmental change due to stress. 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. With no other symptoms of disease, no treatment is necessary. Description of the problem: The first few branches on my tomato plant are fine (growing horizontally), but they have a bit of tomato leaf curl (I think). Septoria leaf spot is one of the most common tomato plant leaf diseases. Q My usually prolific tomato plants have been a disaster this year, with all the leaves curling, browning, drooping and dying back. Proceedings of the 4th International Conference on Plant Protection in the Tropics, Kuala Lumpur Malaysia, 28-31 March 1994, pp. Remember the key to tomato leaf curl is prevention. 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