solani) and is first observed on the plants as small, brown lesions mostly on the older foliage. This disease is caused by the fungi Alternaria linariae (formally known as A.
Joey Williamson, ©2012 HGIC, Clemson Extension Early BlightĮarly blight ( Alternaria linariae) on tomato foliage. Recently, several bacterial wilt resistant rootstocks for grafted tomatoes, peppers, and eggplants have been tested and found to have a high level of resistance. Be sure to thoroughly hose off all soil from tiller tines and tools used in the original infested site before use in the new garden site. Chemical control is not available for this disease.Ĭonsider growing all susceptible solanaceous plants (tomatoes, peppers, eggplants, and Irish potatoes) in a separate newly prepared garden site, completely separate from the original garden. The cultivar Kewalo is partially resistant to bacterial wilt but is an uncommon cultivar. Plant only certified disease-free plants. Remove and destroy all infected plant material. Do not use pepper, eggplant, potato, sunflower, or cosmos in this rotation. Rotation with non-susceptible plants, such as corn, beans, and cabbage, for at least three years provides some control. Prevention & Treatment: Control of bacterial wilt of plants grown in infested soil is difficult. If an infected stem is cut crosswise, it will look brown and tiny drops of yellowish ooze may be visible.
This results in rapid wilt of the plant while the leaves stay green. The bacteria multiply rapidly inside the water-conducting tissue of the plant, filling it with slime. This bacterium survives in the soil for extended periods and enters the roots through wounds made by transplanting, cultivation, insect feeding damage, and natural wounds where secondary roots emerge.ĭisease development is favored by high temperatures and high moisture. Zachary Boone Snipes, ©2015 Clemson Extensionīacterial wilt or Southern bacterial blight is a serious disease caused by Ralstonia solanacearum (formerly Pseudomonas solanacearum). Bacterial wilt ( Ralstonia solanacearum) causing a rapid wilting of tomato plants.
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