Vol. 12, Issue 7 (2023)

Author(s):
Amit, Ashalata, Sumit, Nisha Thakur, Dayasagar and Anil Kotasthane

Abstract:
Rhizoctonia solani (Teleomorph: Thanatephorus cucumeris) is a Soilborne fungus belongs to class Basidiomycetes. Rhizoctonia solani is a complex of 100 species which has wide host range attack all horticultural crops, pastures, cereals and all known crops. Rhizoctonia solani is divided into 14 anastomosis groups i.e., (AG1 to AG13 and AGBI). Among Rhizoctonia solani AG1 has 3 main intra-specific groups (ISG), one of the most important plant pathogens groups is AG1 IA, which cause diseases like sheath blight, aerial blight, brown patch and banded blight in more than 27 plant families of monocots and dicot, including many plants. Most common practice among farmers for the effective management of R. solani is application of fungicide which is adopted worldwide. However, it is necessary to evaluate or screen the new molecules of fungicides for the management of the disease very effectively. Fungicide molecules are hazardous to natural ecosystem an answer to this problem application of fungicides is replaced by use of bio-control agents which is more eco-friendly in the long term. The present investigation was therefore undertaken with the evaluation and identification of potential bio-agents against R. solani. Confrontation assays involving 131 bio-agents (121 fluorescent Pseudomonas + 10 isolates of Trichoderma spp.) identified two potential fluorescent Pseudomonas (P86 and P74) and 10 isolates of Trichoderma spp. effective against R. solani. Isolates of Trichoderma spp. (IRRI2, 94a and T14) were showed compatibility with and Thifluzamide 24% SC. The fluorescent Pseudomonas isolates (P5, P8 and P10) were compatible at all the tested concentration with Thifluzamide 24% SC.