more... > Plant Disease Clinic > Fact Sheets > Herbs & Vegetables > Louisiana Plant Pathology: Scurf of Sweet Potato [Image: scurf] Scurf is a common disease of sweet potatoes. Proper identification is the key to successful disease management. Use this fact sheet to help you identify and manage this disease. (PDF Format Only) Louisiana Plant Pathology: Southern Root-knot Nematode on Vegetables [Image: southern root-knot nematode] The southern root-knot nematode (Meloidogyne incognita) is a widespread problem in Louisiana. This pest favors the soils where most vegetables are produced and has been found in about 25 percent of the vegetable gardens in our state. This nematode can be extremely damaging to some crops and causes severe losses. (PDF Format Only) Louisiana Plant Pathology: Sclerotial Blight and Circular Spot of Sweet Potato [Image: sweet potatoes] Sclerotium rolfsii is a soilborne fungus that causes southern blight on a wide variety of plants. Proper identification is the key to successful disease management. This fact sheet is intended to aid in the identification and management of Sclerotial Blight and Circular Spot. (PDF Format Only) Louisiana Plant Pathology: Tomato Yellow Leaf Curl [Image: tomato yellow leaf curl] Tomato yellow leaf curl is a relatively new whitefly-transmitted virus disease of tomatoes in the United States. It was first observed in South Florida in 1997 and has since spread throughout much of the Southeast, including Louisiana where it was first observed in 2000. Proper identification is the key to successful disease management. This fact sheet is intended to aid in the identification and management of this disease of tomatoes. (PDF Format Only)  more articles... Disease Management in Home Vegetable Gardens [Image: home vegetable gardnes] This publication is intended to introduce home vegetable gardeners to the various methods used to manage the many diseases that affect these crops. (PDF Format Only) Louisiana Plant Pathology: Southern Blight [Image: southern blight] Proper identification is the key to successful disease management. This fact sheet is intended to aid in the identification and management of the disease known as southern blight. (PDF Format Only) Louisiana Plant Pathology: Tomato Pith Necrosis [Image: tomato pith necrosis] Proper identification is the key to successful disease management. This article is intended to aid in the identification and management of tomato pith necrosis. (PDF Format Only) Louisiana Plant Pathology: Phytophthora Blight of Peppers [Image: Phytophthora Blight of Peppers] Proper identification is the key to successful disease management. This fact sheet is intended to aid in the identification and management of phytophthora blight on peppers. Louisiana Plant Pathology: Downy Mildew on Cucurbits [Image: downy mildew on cucurbits] Downy mildew is a potentially devastating disease of all cucurbits. Disease symptoms, development, control measures and color photographs of symptoms on pumpkin, cucumber and watermelon are included. Fungicides for the Management of Downy Mildew of Cucurbits [Image: picture] Downy mildew, caused by Pseudoperonospora cubensis, is a potentially destructive disease of all cucurbits. The use of fungicides is the primary means of managing this disease. TYLCV-Resistant Tomato Varieties [Image: Photo of TYLCV-infected tomato plant] Tomato yellow leaf curl is a potentially destructive disease of tomatoes caused by the tomato yellow leaf curl geminivirus (TYLCV). This disease is generally introduced into fields on infected transplants, but is then spread from plant to plant by the silverleaf whitefly. Management of this disease relies in part on the use of TYLCV-resistant tomato varieties.