Abstract

SUMMARY New broomrape races have spread quickly year after year to reach 70% of the sunflower acreage in Trakya region of Turkey. These new races were more virulent in Turkey than in other countries such as Spain and at least one more race other than F race was observed in Trakya. Some inbred lines from Trakya Agricultural Research Institute-Edirne (TARI) exhibited resistance in some parts of the region, but the sunflower hybrid PR-64-A-95 exhibited resistance in all locations. This hybrid and other resistant lines will be evaluated again in subsequent years and they will be used as a differential set for determining new broomrape races.

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