RESEARCH ON THE TOLERANCE OF SUNFLOWER HYBRIDS TO THE HERBICIDES CHALLENGE 600 SC AND VIBALLA

Abstract

In order to deal with the weeding specific to the area, we have located at the Livada Research and Development Station a technological experience in sunflower culture. The major objective of this research was the tolerance of Chearfield, Express SUN and Conventional sunflower hybrids to Challenge 600 SC and Viballa herbicides in the pedoclimatic conditions of Livada, Satu Mare county, and implicitly the effectiveness of treatments with the aforementioned herbicides. The reserve of weeds on the soil types from the "luvosol albic" orchard being much higher as a result of the preservation of the seeds in the soil for a longer period of time determines a high level of weeding compared to which the herbicide Challenge 600 SC (aclonifen 600g/l ) 4l/ha pre-emergence applied to the sunflower crop, regardless of the type of hybrid, proved to be effective and selective throughout the vegetation period. The effectiveness of the new herbicides was determined by the climatic conditions and the floristic composition of the weeds.