Herbicides in spring oilseed rape: soil and foliar application

Abstract

Possibility to chemically control weeds in spring rapeseed has been tested in two locations, Novi Sad and Kragujevac. The following herbicides were tested: Trefgal (a.i. trifluralin), Gamit (a.i. clomazone), Globus (a.i. quizalofop-p-ethyl) and Lontrel 100 (a.i. clopyralid). Combinations of herbicides Trefgal + Gamit and Trefgal + Lontrel 100 showed the highest efficiency on annual broadleaf weeds in both localities. The tested herbicides had no effect on annual and perennial weed species Agropyrum repens, Cirsium arvense, Cynodon dactylon, as well as the Hibiscus trionum. The herbicide Gamit, in the combination Gamit + Trefgal, exhibited phytotoxicity to the rapeseed crops in both locations. Simultaneously we tested the effect of the herbicides on hectoliter weight of seed and oil and protein content in seed. In Kragujevac, the tested herbicides were not adequately efficient for the weeds present in that location. In Novi Sad, the location predominated by annual broadleaf weeds, the performance of these herbicides was much better. The tested herbicides differed significantly in their effect on the quantity and quality parameters of rapeseed.