Potato: Bacterial soft rot and blackleg categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Potato soft rot Photo by: R.S. Byther Biology Soft rot and blackleg are both caused by bacteria. The soft rot symptoms typically appear on tubers. The small to large circular lesions are sunken, tan or brown, water-soaked areas on […]
Potato: Late blight categories: Potato Potato Diseases Vegetables last review date: 2025-02-26 04:05 Potato late blight foliar symptomsPhoto by: R.S. Byther Biology Late blight of potato is caused by a fungus which also causes disease on tomato, eggplant, and other members of the potato family (Solanaceae). Gray-green, water-soaked spots appear on leaves and stems. These […]
Potato: Potato leafroll mosaic (Leafroll) categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Potato leafroll: healthy vs. diseasedPhoto by: Unknown Biology Leafroll and net necrosis symptoms are caused by a virus. The virus is transmitted by aphids and is also carried in infected tubers. Leaves of plants grown from infected seed pieces show […]
Potato: Powdery scab categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Potato powdery scabPhoto by: R.S. Byther Biology Powdery scab is a fungal disease affecting potato roots and tubers. Tubers develop slightly raised, purplish or brown lesions or pustules on the skin. Initially, the lesions are closed and blisterlike. They later split open […]
Potato: Rhizoctonia canker (Black scurf) categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Potato black scurf fungal structuresPhoto by: R.S. Byther Biology Rhizoctonia canker is caused by a fungus commonly found in the soil. On potatoes, young underground tissues may be attacked. The reddish-brown to brown lesions may result in girdling of sprouts, […]
Potato: Scab (Common) categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Potato common scabPhoto by: R.S. Byther Biology Common scab is characterized by the development of brownish, corky or scabby spots on the surface of the tubers. The spots may be up to 1⁄4″ or more in diameter and slightly raised, or may […]
Potato: Verticillium wilt (Potato early dying) categories: Potato Potato Diseases Vegetables last review date: 2022-12-07 12:00 Verticillium wilt (early dying) on potatoPhoto by: R.S. Byther Biology Verticillium wilt is caused by a fungus commonly found in the soil. Many species of plants are affected by Verticillium, but tomato and potato are favored hosts. Typically, the […]
Potato: Colorado potato beetle categories: Potato Potato Insects Vegetables last review date: 2024-06-05 10:25 Colorado potato beetle adultPhoto by: Clemson University Biology The adult Colorado potato beetle is a broad (1⁄4″ wide), yellow-and-black striped beetle up to about 3⁄8″ in length. The adults overwinter in the soil, emerging in the spring. They lay clusters of […]
Potato: Potato flea beetles categories: Potato Potato Insects Vegetables last review date: 2025-04-16 07:35 Potato flea beetle damagePhoto by: R.S. Byther Biology Flea beetles are small, brown to metallic black beetles with a habit of jumping like fleas when disturbed. They feed on many plants including potato, tomato, radish, spinach, and many weeds. Adults eat […]
Potato: Slugs categories: Potato Potato Insects Vegetables last review date: 2024-06-05 10:23 Slug damage and slimePhoto by: R.S. Byther Biology Slugs are common garden pests in western Washington. They resemble snails, but lack shells. They may vary in size from as little as 1⁄4″ up to several inches in length, depending on age and species. […]