|
|
|
|
|
|
|
 |
 |
|
 |
|
|
|
 |
|
|
Very high yielding, medium russet-skinned, fresh market cultivar, with low specific gravity, smooth, oblong to long tubers with white flesh. |
|
|
|
 |
|
Variety Profiles
Pests
Diseases |
|
| Developer: |
The Colorado and Idaho Agricultural Experimental Stations and USDA. |
| Release: |
1999. |
| Tuber Shape: |
Oblong to long. |
| Eyes: |
Shallow, most eyes on the bud end. |
| Skin: |
Smooth, medium russet. |
| Flesh: |
White. |
| Plant: |
Medium-sized, somewhat spreading vine, white flowers. |
| Yield Potential: |
Very high. |
| Specific Gravity: |
Low. |
| Maturity: |
Medium. |
| Resistances: |
Moderately resistant to blackspot bruise. |
| Susceptibilites: |
Susceptibilities include Fusarium dry rot, bacterial soft rot, early blight tuber decay, and Rhizoctonia scurf. |
| Storability: |
Good, dormancy is medium. |
| Production Mgmt: |
Emergence is fairly uniform. A seed spacing of 10 to 12 inches may optimize yield and desired tuber size. Skin set can be difficult to achieve if nitrogen levels are high prior to vine dessication. Heat sprouts may occur when growing temperature are high. Fertility needs are very minimal compared to other major russet cultivars. Keystone is sensitive to metribuzin applications. Tuber initiation and bulking rate are medium. |
|
|
|
|
 |
|
|
|
 |
|
|
|
|
Note: This information should only be used as a guide. Adjustments for local conditions must always be made. Contact your field consultant for more information.
Information courtesy of Colorado Certified Potato Growers Association.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
