Abstract
The development of potato wart testing at the Ukrainian Plant Quarantine Research Institute is reviewed from the first appearance of wart disease in the 1930s, through the period of breeding of cultivars with resistance to pathotype 1, to the detection of new aggressive pathotypes requiring further tests for multiple wart resistance, and finally to the operation of the Station in independent Ukraine. Wart testing in Ukraine involves two phases, preliminary laboratory testing (by standard methods) and official testing of cultivars in the field. The regulatory basis of wart testing in Ukraine is outlined. This includes testing of Ukrainian‐bred material and of material introduced, for research and breeding or for production, from other countries. The possibilities for breeding cultivars with multiple wart resistance are assessed.
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