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- Bacterial Wilt
- Early Blight
- Late Blight
- Septoria Leaf Spot
- Leaf Mold
- Bacterial Spot
- Tomato Pith Necrosis
- Buckeye Rot
- Anthracnose
- Fusarium Wilt
Bacterial wilt or Southern bacterial blight is a serious disease caused by Ralstonia solanacearum (formerly Pseudomonas solanacearum). 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. Disease develo...
This disease is caused by the fungi Alternaria linariae (formally known as A. solani) and is first observed on the plants as small, brown lesions mostly on the older foliage. Spots enlarge and concentric rings in a bull’s-eye pattern may be seen in the center of the diseased area. The tissue surrounding the spots may turn yellow. If high temperatur...
Late blight is a potentially serious disease of potato and tomato and is caused by the water mold pathogen Phytophthora infestans. Late blight is especially damaging during cool, wet weather. This pathogen can affect all plant parts. Young leaf lesions are small and appear as dark, water-soaked spots. These leaf spots will quickly enlarge, and a wh...
This destructive disease of tomato foliage, petioles, and stems (fruit is not infected) is caused by the fungus Septoria lycopersici. Infection usually occurs on the lower leaves near the ground, after plants begin to set fruit. Numerous small, circular spots with dark borders surrounding a beige-colored center appear on the older leaves. Tiny blac...
The fungus Passalora fulva causes leaf mold. It is first observed on older leaves near the soil where air movement is poor and humidity is high. The initial symptoms are pale green or yellowish spots on the upper leaf surface, which enlarge and turn a distinctive yellow. Under humid conditions, the spots on the lower leaf surfaces become covered wi...
This disease is caused by several species of the bacterium Xanthomonas (but primarily by Xanthomonas perforans), which infect green but not red tomatoes. Peppers are also infected. The disease is more prevalent during wet seasons. Damage to the plants includes leaf and fruit spots, which result in reduced yields, defoliation, and sunscalded fruit. ...
Tomato pith necrosis is usually an early season disease that occurs in greenhouse and high tunnel tomato production. However, during cool and rainy spring weather, tomato pith necrosis may infect tomatoes and occasionally peppers in home vegetable gardens. Pith necrosis is caused by multiple species of soil-borne Pseudomonas bacteria, including Pse...
Buckeye rot is a disease of the fruit caused by the fungus Phytophthora nicotianae var. parasitica. The first fruit symptoms appear as brownish spots, often at the point of contact between the fruit and the soil. As the spots enlarge, dark, concentric rings can be seen. Lesions of buckeye rot resemble those of late blight, except that the former re...
Anthracnose on tomatoes is caused by a group of fungi within the genus Colletotrichum, and these species are primarily pathogens of the tomato fruit. As the fruit are ripening, the symptoms first become noticeable as small, circular indented areas, which later develop darkened centers. The diseased spots continue to grow larger with time as each in...
This is a warm-weather disease caused by the fungus Fusarium oxysporum. The first indication of disease in small plants is a drooping and wilting of lower leaves with a loss of green color followed by wilting and death of the plant. Often leaves on only one side of the stem turn golden yellow at first. The stem of wilted plants shows no soft decay,...
Fruit symptoms are the most common although stem, leaves and roots can also be infected; disease causes characteristic sunken circular lesions on the fruit; the indentations on may have visible concentric brown and yellow rings; lesion centers turn tan in color as they mature and become dotted with small black fungal fruiting bodies ...
Identification and Management. Amanda Gevens and Jaime Wilbur. blight is a plant disease that afects a variety of Solanum spp., Late including eggplant, pepper, nightshade weeds, and petunia. However, it is most infamously known for its destruction of potato, S. tuberosum, and tomato, S. lycopersicum.
May 11, 2023 · This research pathway is followed in this paper, and an approach for classifying selected Solanum lycopersicum diseases (anthracnose, bacterial speck, early blight, late blight and septoria...
Jan 12, 2022 · BER is one of the most devastating physiological disorders that affect various crops such as tomato ( Solanum lycopersicum L.), pepper ( Capsicum annuum L.), watermelon (Citrullus lanatus (Thunb.) and eggplant ( Solanum melongena L.) (Taylor and Locascio 2004; Díaz-Pérez and Hook 2017) (Fig. 1 ).
- 10.1186/s43897-021-00022-9
- 2022
- Mol Hortic. 2022; 2: 1.
Tomato plants are commonly infected by a fungus that manifests as spots shaped like bull’s-eyes on the leaves and fruit. Your plants are likely to have early blight, caused by the fungus Alternaria. This disease is not usually fatal, but it can ruin your harvest. Read on to learn how to manage this ubiquitous disease.
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Diseases include blights, blossom end-rot, Verticillium wilt, Fusarium wilt, Tobacco mosaic virus, and bacterial and viral diseases. Cultivars can vary in their disease resistance. Many hybrids have been developed to improve disease resistance.
