US: Zebra stripe not spread by seed

New research suggests that the zebra chip disease, that arrived in the US Pacific North West last Summer, can not be spread by planting infected seed.

Zebra chip is named for the dark stripes that show up during frying of infected tubers. Symptoms, including curled, pinkish leaves, surface three weeks after infection. It effectively stops tuber development and makes potatoes unmarketable.


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