The root-lesion nematode, Pratylenchus penetrans (Cobb 1917).
Filipjev and Shuurmans Stekhoven, 1941, is widely distributed throughout
Oregon and other temperate zones of the world. Economically
it is probably the most important plant parasitic nematode in Oregon
because of its abundance, wide host range of economic plants and
interactions with other...
Root-knot nematodes were among the earliest plant-parasitic
nematodes to be recognized. Before 1949, they were considered as the
one species Heterodera marioni (Cornu 1887) Goodey 1932. In 1949
Chitwood completed a taxonomic study of the root-knot nematodes and
placed them in a separate genus Meloidogyne. Economically they are
one of...
Published May 1931. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published October 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Fluctuations in population density of Pratylenchus sp.,
Trichodorus sp., and Xiphinema americanum s. 1. in three blueberry
fields were determined monthly for one year. Pratylenchus densities
were greatest in August and least in October. Three distinct
periods of population growth occurred; during January, April, and
between June and August. Trichodorus...
Nematodes are roundworms with complex organ systems. They occur worldwide in all environments. Most species benefit agriculture by contributing to decomposition of organic matter and are important members of the food chain. Some species are parasitic to plants or animals. More than 2,000 of the 20,000
identified nematode species are...
Published June 1930. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The efficiencies of wet sieving/sucrose
centrifugation (WS/SC) recovery of Pratylenchus penetrans
(59 %), Paratylenchus sp., (80 %), and Criconemella
xenoplax (66 %) were established. Baermann funnels (BF)
recovered significantly more P. penetrans (p = 0.01) and
significantly less (p = 0.01) C. xenoplax than did WS/SC.
While densities of P....
The effects of fenamiphos on soil and root populations of Pratylenchus penetrans were evaluated in four red raspberry cv. Willamette fields in Northwestern Oregon. Field 1 was a silty clay loam with 53% organic matter (OM). Field 2 and 3 were silty loam soils with 3.25 and 2.55% OM, respectively...
Published September 1946. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Nematodes are tiny but complex unsegmented roundworms that are anatomically differentiated for feeding, digestion, locomotion, and reproduction. These small animals make important contributions to organic matter decomposition and to the food chain. Some species, however, are parasitic to plants or animals. This publication provides a description and information on biology,...
Published January 1964. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
A major constraint to the production of self-rooted wine grapes (Vitis vinifera) in eastern Washington is plant-parasitic nematodes. Plant-parasitic nematodes can impact grape productivity by limiting water and nutrient uptake, educing physiological changes, and extracting plant nutrients from roots, thereby reducing root biomass, plant vigor, and yield. The most commonly...
This bibliography, an apparently haphazard sampling of literature from many sources, grew out of a general project that was intended to elucidate the role of consumers in the forest system. The 124 articles
briefly abstracted here are ones that give some insight into the role of foliage-feeding insects. The process...