Preliminary results about experimental sunflower hybrids resistant to both sulfonylurea and imidazolinone herbicide

Abstract

It is important to choose what herbicide we want to use depending on degree of weed infestation and what type of sunflower hybrid resistant at sulfonylurea or imidizalinone herbicide. Some farmers who cultivated sunflower in SouthEast of Romania where broomrape is present with the most virulent races, use IMI sunflower hybrids and spray with a IMI herbicide for a better control. Other farmers, prefers SU sunflower hybrids especially in field without broomrape. At NARDI Fundulea, we created sunflower hybrids resistant at sulfonylurea herbicide and sunflower hybrids resistant at imidazolinone herbicide but also we created experimental sunflower hybrids resistant to booth sulfonylurea and imidazolinone herbicide. In year 2018, at NARDI Fundulea, we tested, four experimental sunflower hybrids SU-IMI Plus, H1 SU-IMI Plus, H2 SU-IMI Plus, H3 SU-IMI Plus and H4 SU-IMI Plus, for resistance at sulfonylurea herbicide in Express Sun™ system and imidazolinone herbicide in Clearfield® system. These four experimental sunflower hybrids were full resistant in booth systems, in Express Sun™ and Clearfield®.