Effect of liquid bioinoculants on biocontrol activities and growth promotion of amarathus (Amaranthus cruentes)

An experiment was conducted to evaluate the best consortia of liquid bioinoculantsfor biocontrol of pathogens and to enhance the plant growth and biomass of Amaranthus cruentus under greenhouse conditions. Liquid bioinoculants viz., Azotobacter chroococcum, Bacillus megaterium, Frateuria aurantia, Psuedomonas fluorescens, Bacillus subtilis and Trichoderma viridaewere used either singly oras consortia in different treatment combinations. Treatment T8 (Pathogens+ Bacillus subtilis + Pseudomonas fluorescens + Trichoderma viride) recorded maximum biocontrol efficiency (72.89%) and vigour index (2423.56) followed by T7 (62.25% and 2298.11). Growth parameter like maximum plant height (8.82 cm at 15 DAS, 29.0 cm at 21 DAS and 40.87 cm at 30 DAS) was recorded in T5. Maximum number of leaves (6.23 at 15 DAS, 9.13 at 21 DAS and 12.57 at 30 DAS) was recorded in T5which received consortia of Azotobacter chroococcum, Bacillus megaterium, Frateuria aurantia, Pseudomonas fluorescens, Bacillus subtilis and Trichoderma viride. Maximum root length, shoot length, plant fresh weight and plant dry weight were 7.80 cm, 40.87 cm, 7.87 g and 3.07 g, respectively recorded in T5 followed by other treatments.