Influence of Diflufenican the Herbicide on Some Biological Traits of Bulgarian Common Bean Cultivar Plovdiv 15M

Three-year trials (2006-2008) were conducted in order to determine the influence of the herbicide diflufenican (trade name – Pelikan 50 CK) on certain biological traits of Bulgarian common bean cultivar Plovdiv 15 M. The herbicide was applied in the doses of 200, 250 and 300 ml/ha after the sowing and before the growth of the plants. It has been found that the traits related to the height of the plant, number of fruit-yielding branches, pods and seeds, mass of the seeds and average length of 10 pods per plant were influenced by different doses of the herbicide, by the year and the interaction between these two factors. A 300 ml/ha dose treatment differs most from other variants in the conducted clustering as a result of its strong influence on the traits: number of seeds, fruit-yielding branches and mass of the seeds per plant. The highest stability indices have been obtained for the traits related to the mass of the pods per plant, which showed greater stability regarding the treatment with the herbicide.