Some newer cultivars are resistant to races 1, 2 and 3, and can be found listed in Table 4. Affected plants are usually stunted, discolored and may die. At the end of the season, remove all susceptible plants and burn or dispose of them. Zachary Boone Snipes, ©2015 Clemson Extension. See Table 1 for examples of fungicide products for home garden use. Tomato plants that have tomato spotted wilt are either stunted or only grow on one side. The leaf spots may have a yellow halo. In fact, tasty and easy-to-grow tomatoes are the most popular garden vegetable. Harvest tomato fruit daily as soon as they are ripe. Growth cracks on tomato fruit. This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named. In addition to tomatoes, hosts include peppers, potatoes, eggplants, squashes, lettuce, onions, spinach, watermelons, and also herbs like peppermint. A dramatic offering at market and a great addition to specialty mixes. Rotate tomatoes with crucifers (such as cabbage, broccoli and turnips). When you remove an infected plant, be careful not to spread thrips around even more. ♦Bronze “disease” is a condition in which the coin produces acid (normally hydrochloric or hydrosulfuric acid) internally, and begins to disintegrate ♦The exterior usually exhibits green or brown “growths” that cover the pitting that acids will create Tomato foliage exhibiting leaf roll â the upward curing of lower leaves during high temperatures and drought. Avoid overhead watering by using drip or furrow irrigation. Fungal spores can remain in the soil to infect plants the following year. Joey Williamson, ©2012 HGIC, Clemson Extension. Table 8. 3 What is Bronze Disease? Using a preventative fungicide program with chlorothalonil, mancozeb or copper fungicide, can control the disease. However, tomato pests and diseases such as tomato wilt can harm your crop. Tomato Cultivars with Resistance to Root-Knot Nematodes. Infestations of spider mites result in the bleaching and stippling of leaves. However, while a patina is not destructive, bronze disease most certainly is. To reduce disease severity, test the garden soil annually and maintain a sufficient level of potassium. Tomato pith necrosis is usually an early season disease that occurs in greenhouse and high tunnel tomato production. Often the upper foliage will become twisted and cupped as the bronze areas expand. Prevention & Treatment: Damping-off is often a problem in plants that are planted too early in the spring. Clemson University Cooperative Extension Service offers its programs to people of all ages, regardless of race, color, gender, religion, national origin, disability, political beliefs, sexual orientation, gender identity, marital or family status and is an equal opportunity employer. Late blight is a potentially serious disease of potato and tomato, caused by the fungus Phytophthora infestans. Seeds of several TSWV-resistant cultivars of tomatoes are available from mail-order seed companies. Tomato yellow leaf curl virus (TYLCV) is not seed-borne, but is transmitted by whiteflies. The fungi Pythium and Rhizoctonia cause damping-off of tomato seedlings. Mulching the garden helps create a barrier between the soil surface and the fruit to reduce infections. Do not use over-head irrigation to water the garden, but water at the base of the plants by drip irrigation, soaker hoses, or by hand with a garden hose. The frequency of irrigation should be increased to provide adequate soil moisture for recovery. Repeated fungicide applications with chlorothalonil (very good) or copper fungicide, or mancozeb (good) will keep the disease in check. Ensure healthy transplants or disease-free seeds. Growth Cracks: Tomatoes crack when environmental conditions (drought followed by heavy rain or watering) encourage rapid growth during ripening. For more information on physiological leaf roll, please see HGIC 2222 , Tomato Leaves Rolling? Joey Williamson, ©2013 HGIC, Clemson Extension. The fungus Athelia rolfsii (synonym Sclerotium rolfsii) causes this disease. of Plant and Environmental Sciences, Clemson UniversityAnthony P. 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