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New broomrape races threaten sunflower production in Turkey. Pioneer hybrid P-4223 was resistant in all parts but TARSAN-1018 and some inbred lines were resistant only in some areas in Trakya region. At least one or more new races than F race appear to exist in the region. Use of imidazolinone herbicide and resistant hybrid started in 2003. Farmers used this Clearfield System ® without any problem. This system will be preferred in coming years by farmers in areas problematic for broomrape and weeds, for use together with sunflower cultivars genetically resistant to broomrape.

helia

SUNFLOWER (Helianthus annuus L.) BREEDING IN TURKEY FOR BROOMRAPE (Orobanche cernua Loeffl.) AND HERBICIDE RESISTANCE / JOPO DE GIRASOL (Orobanche cernua Loeffl.) Y RESISTENCIA A HERBICIDAS EN GIRASOL (Helianthus annuus L.) EN TURQUÍA / OROBANCHE (Orobancce cernia Loeffl.) ET RÉSISTANCE AUX HERBICIDES DANS LES LIGNES CULTIVÉES DE TOURNESOL (Helianthus annuus L.) EN TURQUIE