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
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...