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Southern blight tomato2/28/2024 When this common fungal disease affects a tomato. In the case of both bacterial wilt and southern blight, unfortunately, there isn’t much that can be done for the current crop of tomatoes once you have the disease. Mention blight in a room full of gardeners and youll likely be met with a lot of groans and grumbles. Southern blight can affect many other types vegetable plants, including peppers, green beans, and watermelons. If sclerotia of either pathogen make their way back into the soil, both can survive for years causing significant problems.Īll infected plants need to be removed immediately and disposed of properly to help reduce the chances of sclerotia returning to the soil.įor more information on chemical control please see the 2022/2023 mid-Atlantic Commercial Vegetable Production Recommendations Guide. As with bacterial wilt, tomato is not the only host of this disease. The pathogen produces large black sclerotia on the surface and inside infected stems. White mold is more common than Southern blight in New Jersey, and like Southern blight, once introduced into a field or high tunnel it can very difficult to control. Infection occurs near the soil line, and. The fungus will produce white, cottony mycelium and very small, spherical sclerotia which are often have a tannish, brown color. privet, Liriope muscari, mulberry, Poncirus trifoliata, Rosa spp., Vinca minor, yucca, okra, tomato, and tobacco. The resulting infection will girdle the plant causing wilt and death. Symptoms of Southern blight include infection at the base of the stem at the soil line. Like white mold, it can survive in the soil for many years. Southern blight is much more common in vegetable areas south of the state where summer temperatures remain hotter (above 90☏) for longer periods of time. There have been a few reports of Southern blight ( Sclerotinia rolfsii) and White mold ( Sclerotinia sclerotiorum) on tomato and pepper in New Jersey. When the temperature exceeds 70 degrees F, infected plants develop discolored, water-soaked stem lesions near the soil line.
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