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Title: OCCURANCE OF PLANT PATHOGENIC NEMATODES IN GREEN PEA FIELDS IN THE COLUMBIA BASIN.

Author
item DAVID, N - OREGON STATE UNIV
item HAMM, P - OREGON STATE UNIV
item INGHAM, R - OREGON STATE UNIV
item MERRIFIELD, K - OREGON STATE UNIV
item Porter, Lyndon

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 6/13/2006
Publication Date: 10/2/2006
Citation: David, N.L., Hamm, P.B., Ingham, R.E., Merrifield, K.E., Porter, L.D. 2006. Occurance of plant pathogenic nematodes in green pea fields in the Columbia Basin. Published on-line at http://www.apsnet.org/meetings/div/pc06abs.asp.

Interpretive Summary:

Technical Abstract: Irrigated green pea fields in the southern Columbia basin of Oregon and Washington often exhibit areas of unthrifty plants occurring in circular patches. During 2005, plant-pathogenic nematodes were extracted from root and soil samples taken from both healthy and unhealthy areas within thirty-six green pea fields to determine if nematodes were responsible for the areas of poor production. Root-lesion, (Pratylenchus neglectus and P. penetrans), root-knot (Meloidogyne sp.), stubby-root (Paratrichodorus sp.), and stunt (Tylenchorynchus sp.) nematodes were recovered from 8, 5, 4, and 5 sites in Oregon and 10, 9, 3, and 11 sites in Wasington respectively. Additionally, 1 and 4 sites from Washington contained pin (Paratylenchus sp.) and ring (Mesocriconema sp.) nematodes respectively. When present in a field, plant-pathogenic nematode densities were comparable in healthy and unhealthy areas, suggesting nematodes were not responsible for the observed damage within these fields.