Journal of Nematology (2006) 38, 269-270

N.L. David, R.E. Ingham, N.D. McKinley, B.A. Charlton, K.J. Merrifield and N.M. Wade (2006)
Post harvest symptom development of Meloidogyne chitwoodi on potato
Journal of Nematology 38 (2), 269-270
Abstracts of Society of Nematologists 45th Annual Meeting, Lihue, Hawaii, 18-21 June 2006
Abstract: Columbia root-knot nematode (Meloidogyne chitwoodi, CRKN) is a serious pathogen of potato in many areas of the western United States, reducing tuber quality by inducing surface galling and/or internal brown spots. Potatoes are shipped year round and many are stored for over 9 months in refrigerated cold storage at less than 5C. Because the effect of cold storage on post harvest symptom development of CRKN in potato was unknown, field trials were conducted in the Klamath Basin (KB) of Oregon and San Luis Valley (SLV) of Colorado during 2002 and 2003 to determine if internal and/or external CRKN symptoms increased following commercial storage or incubation at room temperature until tubers had accumulated over 500 degree-days base 5C. The percentage of tubers with external symptoms from the KB did not increase following incubation during 2002 and 2003 compared to the harvest evaluation. Similarly, external symptoms on potatoes from the SLV did not increase following commercial storage or incubation during 2002. However, the percentage of tubers with external symptoms increased by 7 and 10% following storage and incubation respectively during 2003. Internal CRKN symptoms did not change following storage at either location, but significantly increased after incubation by 10% and 6% in the KB and by 19% and 13% in the SLV during 2002 and 2003, respectively. These studies indicate that no additional CRKN symptom development occurred when tubers were stored at 5C or less, but that internal symptoms may increase at higher temperatures.
(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

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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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. (SW)
	Meloidogyne chitwoodi	Potato (Solanum tuberosum)	U.S.A. (NW)