G. Delchev
Abstract. During the period 2010 – 2012, on the experimental field of the Field Crops Institute, Chirpan was carried out a field experiment with durum wheat cultivar Elbrus (Triticum durum var. valenciae). A total of 24 variants were investigated. They include vegetation-applied herbicides, soil-applied herbicides and herbicide tank mixtures. Volunteers of Clearfield canola in the durum wheat crops are controlled successfully by vegetation-applied herbicides Derby, Mustang, Sunsac and Weedmaster and soil-applied herbicides Marathon, Stomp and Cougar. Volunteers of Clearfield and ExpressSun sunflower are controlled by herbicides Arat, Derby, Derby super, Mustang, Sunsac, Secator, Lintur, Weedmaster, Marathon, Stomp, Racer and Cougar. Volunteers of coriander in wheat crops are controlled by herbicides Derby, Mustang, Sunsac, Secator, Lintur, Weedmaster, Granstar super, Eagle and Cougar. Herbicide tank mixtures Derby super + Sanafen, Secator + Sanafen, Granstar super + Starane, Laren + Dicotex and Ally max + Sanafen control successfully volunteers of coriander, Clearfield canola, Clearfield and ExpressSun sunflower. Herbicide Cougar causes phytotoxicity on durum wheat. The highest grain yield was obtained by treatment with herbicide tank mixture Granstar super + Starane, Derby super + Sanafen, Secator + Sanafen, Ally max + Sanafen and Laren + Dicotex and herbicides Derby super, Derby, Secator, Sunsac, Mustang , Weedmaster and Arat.