Efficacy of weed control methods in spring wheat

摘要

The study was conducted between the years 2008 and 2010 at the Experimental Station near Rzeszów Krasne. The experiment was carried out on brown soil developed from loess, classified as Ilia bonitation class, of good wheat complex, containing P205 -210 mg/kg of the soil, K20 - 140 mg/kg of the soil and pH in KG - 6.5. The aim of the study was to determine the yield and weed infestation of Monsoon and Parabola varieties of the wheat spring crop in regards to different weed control methods, i.e.: mechanical, mechanical-chemical and chemical, using full and reduced doses of Mocarz 75 WG herbicide (tritosulfuron + dicamba). Similar efficacies of weed control in wheat spring varieties were found in the treatments with recommended herbicide dose and double crop harrowing supplemented with a half dose of herbicide. The effect of variety on the total degree of weed control and the reduction of the air-dry weight of weeds was not unequivocally determined. A significantly higher grain yield of both wheat varieties was obtained from a full dose and a dose reduced by 50% applied after harrowing as compared to the treatments with a half dose of herbicide and mechanical control.