Potato Pest Management Guidelines
UC agricultural management guidelines for control of potato pests. Relative Toxicities of Insecticides and Miticides Used in Potatoes to Natural Enemies and Honey Bees (5/08) Potato Weed Photo Gallery, with Common and Scientific Names ... [... more]
University of California IPM |
Fusarium Dry Rot and Seed Piece Decay
UC Management Guidelines for Fusarium Dry Rot and Seed Piece Decay on Potato. Fusarium causes a dry rot of infected tubers, although a moist rot may occur if secondary infection by soft rot bacteria is also involved. Initially, lesions appear as ... [... more]
University of California IPM |
Common Scab
Tuber symptoms of common scab vary in extent and appearance. Common scab lesions are usually circular and 0.25 to 0.33 inch (6 to 8 mm) in diameter, but they can be smaller in early stages of development and larger if they coalesce. Lesions ... [... more]
University of California IPM |
Scientific name: Bemisia argentifolii
The most common species of whitefly infesting potato is the silverleaf whitefly. The adults are tiny (0.06 inch, 1.5 mm long), yellowish insects with white wings. Silverleaf whiteflies hold their wings somewhat vertically tilted, or rooflike, ... [... more]
University of California IPM |
Columbia root knot nematode: M. chitwoodi (Race 1 & 2)
Root knot nematode larvae invade roots or tubers, establish feeding sites, and develop into the adult stage. Adult females are swollen, sedentary, and lay eggs in a gelatinous matrix on or just below the root surface. These eggs hatch and larvae ... [... more]
University of California IPM |
ORGANIC WEED MANAGEMENT
An effective weed management program takes into account the type of weeds present, crop rotation, cultivation, available herbicides, and the competitive ability of the potato crop. Competition from early season weeds will reduce yields if they ... [... more]
University of California IPM |
Scientific name: Epitrix spp.
Flea beetles are minor pests of potatoes in California. The adults are small, 0.06 to 0.1 inch (1.5 to 2.5 mm) in length, metallic greenish brown to black in color, and tend to jump like fleas when disturbed. The larvae live in the soil, are ... [... more]
University of California IPM |
Potato Psyllid
Potato psyllids look like small cicadas, about 0.08 inch (2 mm) long. They are related to aphids and leafhoppers. The adult has clear wings that rest rooflike over the body. Although predominantly black, the potato psyllid does possess white ... [... more]
University of California IPM |
Diseases Caused By Phytoplasmas
UC Management Guidelines for Diseases Caused By Phytoplasmas on Potato. Symptoms of diseases caused by mycoplasmalike organisms include stunted growth, chorotic or reddened leaves, leafroll, reduced numbers of subterranean tubers, and the ... [... more]
University of California IPM |
PREPLANT AND POSTPLANT
COMMENTS: Apply preemergence following planting or after drag off. Broadcast uniformly followed by rainfall, irrigation or shallow mechanical incorporation. On muck and high organic matter soils use the 0.98 lb a.i. per acre rate. COMMENTS: For ... [... more]
University of California IPM |
Leak (Water Rot)
Leak, also known as water rot, causes spongy, wet internal rot of tubers. The diseased flesh is clearly demarcated from healthy tissue by a dark boundary line. In advanced infections, hollow cavities form and all that remains of some infected ... [... more]
University of California IPM |
Sclerotium Stem Rot
Affected stems on plants with sclerotium stem rot first show a moist decay at or slightly below the soil surface where infection is initiated. Stem lesions expand up and down the stem, and all plant parts can be infected. Stem infection leads to ... [... more]
University of California IPM |
