Journal of Nematology (2006) 38, 275-276

Russell E. Ingham, N.L. David, D.A. Horneck, G. Clough, P.B. Hamm and N.M. Wade (2006)
Crop rotation for management of Meloidogyne chitwoodi
Journal of Nematology 38 (2), 275-276
Abstracts of Society of Nematologists 45th Annual Meeting, Lihue, Hawaii, 18-21 June 2006
Abstract: Columbia root-knot nematode (Meloidogyne chitwoodi, CRKN) infects potato tubers and reduces quality to unmarketable levels at populations as low as 1/250-g soil. Most crops grown in rotation with potato increase CRKN, requiring fumigation or multiple applications of oxamyl. A four-year rotation experiment that began with high CRKN populations, 1,550/250-g soil in spring of 2001; demonstrated that CRKN could be managed with crops currently grown in the Columbia Basin of OR and WA if excellent host crops were grown early rather than late in the rotation. In a conventional rotation of wheat (W)-field corn (FC)-FC, CRKN densities were high (2,000/250-g soil) when potato was planted in spring of 2004 and 100% of harvested tubers were culled due to excessive CRKN infection. Reversing the order of these crops (FC-FC-W) allowed time for a mustard green manure crop (MGM) in fall of 2003 and reduced CRKN to 56/250-g soil and culls to 32%. A FC-W-supersweet corn (SSC)-MGM rotation reduced CRKN to 14/250-g soil and culls to 27%. A FC-SSC-green pea-lima bean (GP-LB)-MGM and a FC-W-GP-LB-MGM sequence reduced CRKN to 3/250-g soil and culls to 9% and 2%, respectively. Seed crops of bluegrass, perennial ryegrass and tall fescue followed by MGM reduced CRKN to 19, 0 and 0/250-g soil, respectively, and culls to 48%, 13% and 2%, respectively. All 11 alternative rotations substantially reduced CRKN and had significantly fewer culls than the standard. Growers assumed alternative rotations would be less profitable but all alternative rotations had higher net value than W-FC-FC-potato.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Russell E. Ingham, George H. Clough, Philip B. Hamm

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne chitwoodi	Potato (Solanum tuberosum)	U.S.A. (NW)