Özet:

Sunflower (Helianthus annuus L.) is one of the main oil crops in the world but it is the essential oilseed in Turkey. Sunflower grows widely in the Turkey and also other countries due to higher adaption capability, higher mechanization use, easy marketing, and also it is one of most preferable and consuming vegetable oil in Turkey. Weeds and broomrape parasite is the devastating biotic stress factor limited seed and oil yield in sunflower production. Clearfield System hybrids resistant to Imidazilonone (IMI) herbicide which controls both broomrape and also key broad-leaf weeds is commonly use in the world widely, because Clearfield system is easy solution both for broomrape problem and also especially large leaf weeds such as Xanthium strumarium Wallr. Chenopodium album L., Echinochloa cruss-galli, Sinapsis arvensis L., Amaranthus spp., Solanum nigrum L., Datura stramonium L. ragweed, Avena spp. etc. in sunflower production. The study conducted to determine IMI sunflower hybrid performances in yield conducted trials in Tekirdag and Edirne, Trakya Region which is European part of Turkey. This region has more than 40 % of sunflower production areas in Turkey. IMI candidate hybrids were existed in yield trials and all important yield traits were measured and compared with control hybrids which are most selling commercial hybrids in the market in 2017. Some candidate hybrids had higher performances in the trials.

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