Efficiency of some Biological and Chemical Agents in Controlling Common Scab Disease in Potatoes Caused by Streptomyces scabies

Abstract

This study was carried out at the University of Anbar - College of Agriculture - Department of Plant Protection. This study aimed to evaluate the efficiency of using biological and chemical control agents such as Azotobacter chroococcum, Glomus mosseae and ammonium sulfate (NH4)2SO4 in controlling common scab disease on potatoes caused by Streptomyces spp. A study of its effect on reducing the severity of disease, evidence of scabies, and some studied parameters such as plant speed, plant diameter, plant diameter, and stem diameter Azotobacter chroococcum was superior to the rest of the treatments in reducing the percentage of infection severity and the percentage of evidence of scab, which amounted to (16.90 and 24.000), respectively, and an increase in the growth parameters of the crop, the speed of emergence, the height of the plant, the number of aerial stems, the diameter of the stem, the yield of one plant, and the total yield in tons, which amounted to (2.667%,41.111 6.000, 4.900, 1227.67, 7.00).