Allelopathic effect of brassica napus residues and etalfluraline herbicide on germination and some cotton characteristics of Bakhtegan cultivar

Weeds are one of the most important factors threatening agricultural products with high yield and quality. Ethalfluraline is a selective herbicide from the dinitroaniline group and is available in the market under the Sonalan brand. The main purpose of allelopathic research is to provide evidence for the interference of chemicals under natural conditions and the introduction of alchemicals that inhibit other plants and microorganisms in the natural or agricultural ecosystem. This experiment was performed to investigate the allelopathic effect of rapeseed and Sonalan herbicide on germination and some characteristics of cotton using a factorial design in a randomized complete block design with four replications. The treatments used include the amount of canola residues (soil without residues, 5% residues, 10% residues, 15% residues and the amount of Sonalan herbicide without herbicide application, 1.5-2 liters per hectare, 2-3 liters per hectare. In general, it showed that Sonalan herbicide in the amounts used for cotton fields did not have a significant effect on the germination of yield components and related traits in cotton plants and decreased by 12%. However, the height of the crop plant, the number of nodes on the stem and the number of leaves of the crop plant were not affected by the amount of residues. Dry weight of cotton 90 days after planting was significantly affected by residue level.