Cultivar

Most of the cultivars were kindly provided by:

John Helgeson, USDA-ARS and University of Wisconsin, Madison, WI

Bill Campbell, Plant Materials Center, Palmer, AK

Shelley Jansky, USDA-ARS and University of Wisconsin, Madison, WI

Susie Thomson, North Dakota State University, Fargo, ND

Year

Data from:

Hamester, W and Hils U. 1998. World Catalogue of Potato Varieties 1999.

Agrimedia. Bergen/Dumme, Germany. 208 pages.

CS - Common Scab

Tubers were evaluated based on the following scale

Rating	Severity	Coverage
0	No scab visible	No scab visible
1	Scab <= 1 mm deep	Trace or 1-2 lesions less than 1 cm^2
2	Scab 2-3 mm deep	1 to 5 % tuber surface covered
3	Scab 3-4 mm deep	>5 to 50% tuber surface covered
4	Scab 4-5 mm deep	Over 50% tuber surface covered
5	Scab over 5 mm deep	---

Entries were considered resistant if the severity and coverage ratings were 0-1 moderately resistant for severity and coverage ratings of 2-3, and susceptible for severity ratings of 4-5 or a coverage rating of 4.

LB – Late Blight

Evaluations for late blight take place at UMORE Park, Rosemount, MN.

Materials are evaluated based on the CIP scale:

CIP	% Late Blight
Rating	Mean	Limits
1	0	0
2	2.5	Trace to 5
3	10	5 to <15
4	25	15 to <35
5	50	35 to <65
6	75	65 to <85
7	90	85 to <95
8	97.5	95 to <100
9	100	100

CIP ratings are categorized based on readings taken 28 days after inoculation as follows:

Resistance Class	Score
Resistant	<2.5
Moderately Resistant	2.5-4.99
Moderately Susceptible	5-7.49
Susceptible	>7.5

PVY, PLRV – Potato virus Y and Potato leafroll virus

PVY and PLRV data provided by Jeff Davis, Department of Entomology, University of Minnesota. Potato cultivars were exposed to viruliferous aphids, followed by ELISA detection.

Pictures

Pictures of tubers and flowers are property of the Potato Pathology and Genomics lab at the University of Minnesota and may be used for non-commercial purposes only. Please credit Potato Pathology and Genomics, University of Minnesota.