3 edition of Alfalfa stem nematode. found in the catalog.
Alfalfa stem nematode.
Otis C. Maloy
by Cooperative Extension Service, College of Agriculture, Washington State University in Pullman
Written in English
|Series||Plant diseases, Extension mimeo -- 2337., Extension mimeo (Washington State University. Cooperative Extension) -- 2337.|
|The Physical Object|
The stem nematode is a serious pest in western states causing stunting of alfalfa stems. This chapter provides information on disease symptoms, pathogen characteristics, and disease management practices for the major diseases of alfalfa that occur in the U.S. Currently, there are no nematicides registered for alfalfa to suppress stem nematodes but product evaluation is ongoing.• Forage Management for Dairy Forage is the backbone of livestock rations.
The alfalfa stem nematode, Ditylenchus dipsaci (Kuhn) Filipjev, is found in all major alfalfa producing areas the United States and is an important pathogen of alfalfa Medicago sativa L. (7). The northern root-knot nematode, Meloidogyne hapla Chitwood, is associated with dormant alfalfa in cool temperate areas. The stem nematode, Ditylenchus dipsaci, uniquely lives above the ground and does not infest roots. Initial symptoms arise in stems, branches and leaf petioles, which swell and become chlorotic. Stems subsequently become twisted and distorted with shortened internodes.
D. dipsaci was found for the first time in Wyoming, USA in Estimates of percent hectarage with D. dipsaci-infected plants in 3 areas of irrigated lucerne surveyed in Wyoming were ± , ± and ± % for Goshen, Fremont and Big Horn-Washakie counties, respectively. Plants infected with D. dipsaci were found in 63 of fields by: 4. Resistance to diseases and stem nematode. The anthracnose resistance is outstanding and the level of resistance to nematodes and verticillium are so good that yield and quality is maintained year after year. Withstands lodging and hard winters. The fall dormancy is among the lower on the French list (), allowing to resist rather strong winters.
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Alfalfa Stem Nematode (ASN) is a nearly microscopic round worm that enters the alfalfa plant and lives in the stems and leaves, usually above ground. Under ideal conditions (wet weather in late winter or early spring, at °F), ASN can complete its life cycle from egg to.
Ditylenchus dipsaci is a plant pathogenic nematode that primarily infects onion and garlic. It is commonly known as the stem nematode, the stem and bulb eelworm, or onion bloat (in the United Kingdom).
Symptoms of infection include stunted growth, discoloration of bulbs, and swollen stems. dipsaci is a migratory endoparasite that has a five-stage lifecycle and the ability to enter into a Class: Tylenchoidea. Alfalfa is a critical cash/rotation crop in the western region of the United States, where it is common to find crops affected by the alfalfa stem nematode (Ditylenchus dipsaci).
Understanding the spread dynamics associated with this pest would allow end-users to design better management programs and farming practices.
This is of particular importance given that there are no nematicides Cited by: 3. The book is clearly and concisely written for pest management professionals and growers. The first of the extensive University of California IPM manual series, IPM for Alfalfa Hay presents an ecological approach for the management of the crop and pest insects, weeds, vertebrates, pathogens, and abiotic disorders.
Alfalfa Stem Nematode. Alfalfa is a critical cash/rotation crop in the western region of the United States, where it is common to find crops affected by the alfalfa stem nematode (Ditylenchus dipsaci).
Understanding the spread dynamics associated with this pest would allow growers to design better management programs and farming practices. This understanding is of particular importance given that there are no Cited by: 3.
Bulb and stem nematode Ditylenchus dipsaci. Chrysanthemum foliar nematode Aphelenchoides ritzemabosi. Cyst nematode Heterodera trifolii. Dagger nematode Xiphinema americanum.
Alfalfa enation genus Rhabdovirus, Alfalfa enation virus (AEV) Alfalfa mosaic: genus Alfamovirus, Alfalfa mosaic virus (AMV) Bean leaf roll. Resists stem nematode problems common to lighter soils; Very fast recovery and very good frequent cutting tolerance; Establishment.
Use a soil test measure as a guide to check your pH and nutrient status several months before seeding alfalfa seeds. Apply lime 4/5(13). The Compendium of Alfalfa Diseases and Pests, Third Edition, is the most comprehensive diagnostic reference guide to date on the many diseases and insect pests of alfalfa, one of our most important forage easy-to-use book includes comprehensive diagnostic and management information on nearly 50 infectious diseases, non-infectious diseases, insect pests, and abiotic conditions (like.
Plants are exploited by a diverse community of insect herbivores and phytopathogens that interact indirectly through plant-mediated interactions. Generally, plants are thought to respond to insects and pathogens through different defensive signaling pathways.
As plants are selected for resistance to one phytophagous organism type (insect vs. pathogen) in managed systems, it is not clear how Cited by: 6. alfalfa entries for stem and root-knot nematodes were developed. Stem Nematode Three factors affect the screening and evaluation procedure for stem nematode resistance: 1.
Nematode inoculation a. Plants were inoculated at the unifo1iate stage. I b. Inoculum level: 10 nematodes/plant were ~sed (one inoculation) instead of File Size: 2MB.
Alfalfa plants infected with the alfalfa stem nematode have stunted growth, fewer shoots, and deformed buds. As nematode populations increase, lower stems on infected plants may turn black.
Long periods of parasitism during moderate temperatures and high humidity may cause stem blackening for 1 foot or more above the ground. Excellent pest resistance package; HR to stem nematode and multi-species aphid resistance Superior performance in tough soils with high saline conditions Great for 5.
Stem nematode is the most economically devastating of the nematodes to infest alfalfa. Stands may become economically nonviable within 2 to 3 years after infestation (Faulkner and Bolander, ).
Root-knot nematode (Meloidogyne spp.) is the most widely disseminated plant parasitic pest in the world. Resists stem nematode problems common to lighter soils; Very fast recovery and very good frequent cutting tolerance; Establishment. Use a soil test measure as a guide to check your pH and nutrient status several months before seeding alfalfa seeds.
Apply lime /5(11). book (see "For further reading," righthand column). Nematode resistance Nematode resistance ratings are listed in table 1. The major nematodes affecting alfalfa grown in the Pacific Northwest are: Alfalfa stem nematode (Ditylenchus dipsaci [Kuhn] Filipjev) Root knot nematode (Meloidogyne hapla, Chitwood) Alfalfa stem nematode.
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For technical questions regarding this item, or to correct its authors, title. Lygus, a disrupter of alfalfa seed production. Utah Pests Newsletter * Ramirez, R., (). Thrips and aphids in alfalfa, one is a major concern.
Utah Pests Newsletter * Ramirez, R., (). An alfalfa weevil from the underground. Utah Pests Newsletter * Ramirez, R., ().
Neonicotinoids: from innovation to bad word. Utah Pests Newsletter *. Stem nematode disease of alfalfa (Medicago sativa) is an economically important issue facing agriculture in the western United States.A better understanding of the ecology of Ditylenchus dipsaci, the nematode that causes stem disease can help to improve survey techniques and management plans for this abitats (above- and below-ground), individual fields and regions (river basins Cited by: 3.
The book of alfalfa; history, cultivation and merits. Its uses as a forage and fertilizer. Alfalfa. -/ Dodder Plant on an Alfalfa Stem. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Stem nematode: Resistance desirable on some river systems only (seek local advice). Potential hay quality: Highly winter active varieties may be more stalky especially as lucerne stands thin. Local productivity and persistence: Consult local trial information if available. See Appendix IV for ratings on winter growth, insects and diseases.
Sharafeh, M. Distribution and rate of infestation of alfalfa stem nematode Ditylenchus dipsaci (Kuhn, ) Filipjevin Fars, Kohkiluyeh and Boyrahmad provinces. Entomologie et Phytopathologie Appliques. –2.
Google Scholar.Alfalfa originated from the Mediterranean basin and southwest Asia (Iran, Afghanistan) and was one of the first forage crops to be domesticated (Cook et al., ).It is now cultivated worldwide, from 36°S to 58°N and from sea level up to m (Ecoport, ).The USA is the main producer of alfalfa, and the crop is common in many parts of Europe as well as in the Middle-East, Africa, South.Suppression of the root-lesion nematode (Pratylenchus penetrans) in alfalfa (Medicago sativa) by Streptomyces spp The present book chapter highlights the different aspects of Streptomyces and.