Productivity of clearfield oilseed canola (Brassica napus L.) by influence of some herbicides, herbicide tank mixtures and herbicide combinations

Abstract

During the period 2018 - 2020 a field experiment was carried out with the winter Clearfield oilseed canola hybrid Phoenix CL (Brassica napus L). A total of 15 variants were investigated. They included untreated control, 2 combined herbicidesр 6 herbicide tank mixturesр 6 herbicide combinations. Foliar-applied herbicides were treated during 2-4 leaf canola stage. Soil-applied combined herbicides were treated during after sowing before emergence period of the canola. The lowest canola yields are obtained in untreated control as a result of the big weed infestation. The highest seed yields are obtained by use of combined herbicide Cleranda, followed by herbicide tank mixture Electron + Maza and combined herbicide Cleravo. High canola yields are also obtained by herbicide tank mixtures Butizan max + Maza, Springbok + Maza, Tanaris + Maza, as well as by herbicide combinations Caliph mega + Maza, Brasan + Maza, Bismarck + Maza. Increase in seed yields is due to the greatest degree of increase in indexes seeds number per pod, seed weight per pod and 1000 seeds weight. Plant height is greatest by use of combined herbicide Cleranda, followed by herbicide tank mixture Electron + Maza and combined herbicide Cleravo.