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M.J. Pavek, Z.J. Holden, R.R. Spear, and B.J. Weddell. 2018  Improving Land Use Efficiency and Grower Revenue by Reducing Potato Row Width. Am J Pot Res


Zommick, D.H., L.O. Knowles, M.J. Pavek and N.R. Knowles.  2014. In-season heat stress compromises postharvest quality and low temperature sweetening resistance in potato (Solanum tuberosum L.). Planta DOI 10.1007/s00425-014-2048-8 (in press).

Zommick, D.H., L.O. Knowles and N.R. Knowles. 2014. Tuber respiratory profiles during low temperature sweetening (LTS) and reconditioning of LTS-resistant and susceptible potato (Solanum tuberosum L.) cultivars.  Postharvest Biol Tech 92:128-138.

Whitworth, J.L., Novy, R.G., Stark, J.C., Love, S.L., Thornton, M.K., Charlton, B.A., Yilma, S., Knowles, N.R., Pavek, M.J., and X. Wang. 2014. Huckleberry Gold: a high antioxidant purple-skin yellow-flesh specialty market cultivar with potato cyst nematode resistance (H1) and Potato virus X resistance (Nb and Rx1).  Am J Pot Res DOI 10.1007s12230-014-9368-x.


Green, A.R., Nissen, M.S., Kumar, G.N.M., Knowles, N.R., and ChulHee Kang. 2013.Characterization of Solanum tuberosum multicystatin and significance of core domains.  Plant Cell 25:5043-5052.

Novy, R.G., Whitworth, J.L., Stark, J.C., Charlton, B.A., Yilma, S., Knowles, N.R., Pavek, M.J., Spear, R.R., Brandt, T.L., Olsen, N., Thornton, M., Brown, C.R., James, S.R., and D.C. Hane. 2013. Teton Russet: an early-maturing, dual-purpose potato cultivar having high protein and vitamin C content, low asparagine, and resistances to common scab and Fusarium dry rot. Am J Pot Res (online ahead of print, 10.1007/s12230-013-9362-8).

Zommick  D.H., Kumar, G.N.M., Knowles, L.O. and N.R. Knowles.  2013. Translucent tissue defect in potato (Solanum tuberosum L.) tubers is associated with oxidative stress accompanying an accelerated aging phenotype. Planta 238:1125-1145.

Mooney, S, Chen, L, Kuhn, C., Navarre, D.A., Knowles, N.R. and H. Hellmann. 2013.Genotype specific changes in vitamin B6 content and the PDX family in potato. BioMed Research International .

Blauer, J.M., Knowles, L.O. and N.R. Knowles. 2013. Manipulating stem number, tuber set and size distribution in specialty potato cultivars. Am J Pot Res 90:470-496.  (DOI 10.1007/s12230-013-9317-0).

Blauer, J.M., Knowles, L.O. and N.R. Knowles. 2013. Evidence that tuber respiration is the pacemaker of physiological aging in seed potatoes (Solanum tuberosumL.).  J Plant Growth Regul 32:708-720.  (DOI 10.1007/s00344-013-9338-4).

Navarre, D.A., Payyavula, R.S., Shakya, R., Knowles, N.R., and S.S. Pillai. 2013.Changes in potato phenylpropanoid metabolism during tuber development. Plant Physiol Biochem 65:89-101.

Changes in ascorbate and associated gene expression during development and storage of potato tubers (Solanum tuberosum L.), by J.M. Blauer, G.N.M. Kumar, L.O. Knowles, A. Dhingra, and N.R. Knowles. Postharvest Biol Tech (2013) 78:76-91.


Toxicity and metabolism of exogenous α,β-unsaturated carbonyls in potato (Solanum tuberosum L.) tubers, by L.O. Knowles and N.R. Knowles. ( J. Ag. Food. Chem. [2012] 60: 11173-11181.

“AmaRosa,” a red skinned, red fleshed fingerling with high phytonutrient value,by C.R. Brown et al. (Am. J. Pot. Res. 89: 249-254. DOI 10.1007/s12230-012-9248-1).

Purple Pelisse:  A specialty fingerling potato with purple skin and purple flesh,by M.I. Vales et al. (Am. J. Pot. Res [2012] DOI 10.1007/s12230-012-9254-3).

Owyhee Russet: A variety with high yields of U.S. No. 1 tubers, excellent processing quality, and moderate resistance to Fusarium dry rot (Fusarium solani var. coeruleum)by S. Yilma et al. (Am. J. Pot. Res [2012] 89: 175-183.DOI 10.1007/s12230-012-9239-2).

Palisade Russet: A late blight resistant potato cultivar having a low incidence of sugar ends and high specific gravity, by R.G. Novy et al. (Am. J. Pot. Res. [2012] 89: 89-101).


Alpine Russet: A potato cultivar having long term tuber dormancy making it suitable for processing from long-term storage, by J.L. Whitworth et al. (Am. J. Pot. Res. [2011] 88: 256-268).

Protein mobilization from potato tubers during long-term storage and daughter tuber formation, by S.M. Weeda et al. (Int’l J. Plant Sci. [2011] 172: 459-470).
WSU potato cultivar yield and postharvest quality evaluations for 2010 by N.R. Knowles and M.J. Pavek. Washington State University Special Report [2011], 122p.


Age-induced loss of wound-healing ability in potato tubers is partly regulated by ABA, by G.N.M. Kumar et al. (Planta [2010] 232:1433-1445).

Clearwater Russet: A dual-purpose potato cultivar with cold sweetening resistance, high protein content, and a low incidence of external defects and sugar ends, by R.G. Novy et al. (Am. J. Pot. Res. [2010] 87:458-471).

Yukon Gem: A yellow-fleshed potato cultivar suitable for fresh-pack and processing with resistances to PVYo and late blight, by J.L. Whitworth et al. (Am. J. Pot. Res. [2010] 87:327–336).

Classic Russet: A potato cultivar with excellent fresh market characteristics and high yields of U.S. No. 1 tubers suitable for early harvest or full-season production, by J.C. Stark et al. (Am. J. Pot. Res. [2010] 87:360-373).

Correlative changes in proteases and protease inhibitors during mobilization of protein from potato (Solanum tuberosum L.) seed-tubers, by S.M. Weeda et al. (Functional Plant Biology [2010] 37:32-42).

WSU potato cultivar yield and postharvest quality evaluations for 2009, by M.J. Pavek and N.R. Knowles (Washington State University Special Report [2010], 122 p.).

Tuber maturity and postharvest behavior, by N.R. Knowles et al. (Proceedings of the 1st Annual Washington and Oregon Potato Conference [2010]. pp. 57-72).

Defining in-season nitrogen needs for Alturas and Premier Russet, by C.D. Hiles et al. (Proceedings of the 1st Annual Washington and Oregon Potato Conference [2010]. pp. 27-44.)

Disease resistance in new tri-state potato varieties, by I.M. Vales et al. (Proceedings of the 1st Annual Washington and Oregon Potato Conference [2010]. pp. 99-102).

Effects of nitrogen management on growth, yield, tuber maturity and postharvest quality, by N.R. Knowles et al. (Potato Progress [2010] 10(9): 5-6).


Sweetening responses of potato tubers of different maturity to conventional and non-conventional storage temperature regimes by N.R. Knowles et al. (Postharvest Biology and Technology [2009] 52: 49-61).

Characterization of Solanum tuberosum multicystatin and its structural comparison with other cystatins by M.S. Nissen et al. (The Plant Cell [2009] 21: 861-875).

Highland Russet: A full season, processing variety with high yields of uniform U.S. No. 1 tubers by J.C. Stark et al. (Am. J. Potato Res. [2009] 86 (3): 171-182).

Developmentally linked changes in proteases and protease inhibitors suggest a role for potato multicystatin in regulating protein content of potato tubers by S.M. Weeda et al. (Planta [2009] 230: 73-84).


Willamette: A late-maturing round white chipping potato by A.R. Mosley et al. (Am. J. Potato Res. [2008] 85(1):85-92).

Premier Russet: A dual-purpose, potato cultivar with significant resistance to low temperature sweetening during long-term storage by R.G. Novy et al. (Am. J. Potato Res. [2008] 85(3):198-209).

Planting depth influences potato plant morphology and economic value by M.J. Pavek and R.E. Thornton. (Am. J. Potato Res. [2008] 86(1):56-67).

Other Resources

Nutrient Management Guide: Central Washington Irrigated Potatoes, WSU

Potato Nutrient Management for Central Washington, WSU.

Researchers awarded for publication

The article “Manipulating Stem Number, Tuber Set and Size Distribution in Specialty Potato Cultivars,” by former graduate student Jacob Blauer and scientists Lisa Knowles and Rick Knowles, has been named the Outstanding Paper for 2013 by the American Journal of Potato Research (90:470-496).  The authors were recognized at the 2014 Annual Meeting of the Potato Association of America in Spokane, Washington in July.

Fertilizer Management Practices for Potato Production in the Pacific Northwest


Pest Management Strategic Plan for Organic Potato Production in the West


Tri-State Potato Varieties

For information and availability, visit the Potato Variety Management Institute