Phew! Remember the key to tomato leaf curl is prevention. It causes leaves to twist and curl, and is transmitted between plants by the whitefly. "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. 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. The leaves fold up and in from the certain of the leaf vein (making sort of a mini-taco appearance). Purple leaves are caused by expression of anthocyanin due to light exposure. First, the Grosse Lisse, then the Burnley Surecrop and now the Romas have all succumbed. Septoria leaf spot is one of the most common tomato plant leaf diseases. If it is verticillium wilt, how long will it persist in the soil? Q My usually prolific tomato plants have been a disaster this year, with all the leaves curling, browning, drooping and dying back. According to Wikipedia, tomato yellow leaf curl virus is found in tropical and subtropical regions. Virus-infected plants often show other symptoms of a problem. As I mentioned on your other post, It is called 'tomato leaf roll'. The stress could either be environmental, biological or chemical related. One way to prevent the spread of this virus is through the use of insecticides. Whiteflies cause this disease and help it to spread from plant to plant. Tomato Viruses | Mosaic, Leaf curl. At the first signs of symptoms, remove and destroy plants. Australian tomato leaf curl virus, a whitefly-transmitted geminivirus causing a disease of tomatoes in Northern Australia. Once it curls, it will most likely not straighten itself out. → Tomato Plant Disease: Septoria Leaf Spot. Leaves may curl up when a plant gets a virus. With no other symptoms of disease, no treatment is necessary. 235-7. ACKNOWLEDGMENTS Tomato leaf roll. Symptoms include stunting and distortion of foliage, mottling and streaking of stems and leaves. On a positive note, it may not be pretty but at least it … Small black spots may show up in the center. Tomato Yellow Leaf Curl Virus. Proceedings of the 4th International Conference on Plant Protection in the Tropics, Kuala Lumpur Malaysia, 28-31 March 1994, pp. The plant becomes stunted, and leaflets curl and grow increasingly smaller, exhibiting a puckered appearance. Spread in many ways, including sap-sucking insects, garden tools, hands, implements, even old trellises. Tomato plant leaves respond to various stresses by rolling or curling up. A In the pics you sent … Continue reading Q&A: What’s killing my tomatoes? 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). 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