Rice Pest Management Guidelines
UC agricultural management guidelines for control of rice pests. Relative Toxicities of Pesticides Used in Rice to Natural Enemies and Honey Bees (4/04) Treatment Periods for Most Effective Control in an IPM Program (4/04) Rice Weed Photo ... [... more]
University of California IPM |
Rice Seed Midges
Midges are the most common group of insects in rice fields. Over 30 species have been found in California rice fields, but comparatively few species are associated with seed and seedling injury. Adult midges swarm in small clouds over rice fields ... [... more]
University of California IPM |
Tadpole Shrimp
Although they are crustaceans, tadpole shrimp resemble tadpoles in size, shape, color, and mobility. Tadpole shrimp have about 35 body segments, and all but the last six or seven have pairs of leaflike, gill-bearing appendages. A thin, ... [... more]
University of California IPM |
Seed Rot and Seedling Diseases
UC Management Guidelines for Seed Rot and Seedling Diseases on Rice. Seed rot and seedling diseases often appear within a few days of planting. Whitish outgrowths of fungal mycelium emerge from cracks in the seed glumes or from the collar of the ... [... more]
University of California IPM |
Rice Blast
The rice blast fungus may infect and produce lesions on most of the shoot but usually not the leaf sheath. From the seedling stage through plant maturity, rice blast progresses through several phases starting with leaf blast, followed by collar, ... [... more]
University of California IPM |
Weed Photo Gallery, with Common and Scientific Names
Rice Weed Photo Gallery with Common and Scientific Names. Sagittaria montevidensis Sagittaria longiloba Echinodorus cordifolius Alisma plantago-aquatica (Reviewed 12/99, updated 5/02) arrowhead, California Scirpus mucronatus Scirpus ... [... more]
University of California IPM |
Scientific Names: Procambarus clarki and Orconectes virilis
The most common crayfish in rice fields is the red crayfish, Procambarus clarki, but Orconectes virilis, an olive-green colored crayfish, may also be found in canals and streams associated with rice fields. Crayfish reproduce once a year. Mating ... [... more]
University of California IPM |
Aster Leafhopper
Several species of leafhoppers feed on rice plants in California, but the only one known to be of economic importance is the aster leafhopper. The adults are about 0.125 inch long, with transparent wings that are strongly veined, and body ... [... more]
University of California IPM |
Stem Rot of Rice
In water-sown rice, stem rot first appears during the tillering stage as small, black lesions on leaf sheaths at the water line. As the disease progresses, infected sheaths die and slough off. The infection may eventually penetrate the culm. The ... [... more]
University of California IPM |
SEED SOAKING
Information about Treatment Periods for Most Effective Control in an IPM Program in Rice. Seed rot and seedling disease Broadleaf and sedge weeds Broadleaf and sedge weeds-Resistant biotypes Perennial weeds-Gregg arrowhead, Ricefield bulrush J. ... [... more]
University of California IPM |
Kernel Smut
Kernel smut appears as a black mass of chlamydospores that replace all or part of individual kernels near or at maturity. Usually only a small number of kernels on each panicle are infected. Completely smutted kernels may be slightly swollen ... [... more]
University of California IPM |
Foliar Damage.
Two species of armyworms, the armyworm and the western yellowstriped armyworm, are found in rice fields in mid-summer. Spring and early summer generations are spent on other plants. When other food sources are depleted, larvae of either species ... [... more]
University of California IPM |
