Effect of seed treatment using Mancozeb and Ridomil fungicides on Rhizobium strain performance, nodulation and yield of soybean (Glycine max L.)

The viability of commercial Rhizobium strains (SB-14 and SB-12) were inoculated fungicides (Mancozeb Ridomil) used as seed dressed on soybean to investigate their effect nodulation, plant growth yield soybean. Application Rhizobial inoculants alone gave the highest nodulation shoot dry weight performance well both sites. SB-12 inoculant had significantly shown be more effective than SB-14 in increasing thus produced higher yield. survival seeds was severely affected by fungicides, resulting decreased for inoculants. However, Ridomil fungicide lowest when applied with either or strains. differed sensitivity Mancozeb that strain showed a slight no rhizobium, Seed-dressing mancozeb ridomil resulted reduction 882.8 kg ha-1 1154.7 ha-1, respectively strain. present results indicate differ capacity develop resistance two fungicides. Seed treatment combination slightly Consequently, may compatable Rhizobia. also suppressive effects seed-applied development depend specific fungicide. Soybean not need management lower concentration could compatible suppress soil-borne pathogens Assosa Begi sites, western Ethiopia.