Biodiversity and host range of Rhizoctonia solani isolates from the al-shariʿa region, Karbala province, Iraq
DOI:
https://doi.org/10.59658/jkas.v12i4.5167Abstract
This research aimed to investigate the biodiversity of Rhizoctonia solani in the Al-Sharia area of Karbala Governorate and to study the host range of high-pathogenicity fungal isolates. It also aimed to determine their Anastomosis groups. The isolation and identification results showed the presence of several pathogenic fungi belonging to six genera of fungi associated with plant roots and stem bases: Rhizoctonia sp., Alternaria sp., Aspergillus spp., Fusarium spp., Macrophomina sp., and Colletotrichum spp. Rhizoctonia sp. was the dominant species, with an incidence rate of 85% and a frequency of 47.3%. The results showed that all tested Rhizoctonia spp. isolates exhibited high pathogenicity, reducing seed germination rates. The germination inhibition percentage rangedfrom 12% to 100%, while in the control treatment it was 0.00%. Isolates R2K1, R2K12, R1K13, and R2K15 completely prevented germination, with 0.0% germination in their respective treatments. Meanwhile, an isolate of R. solani from cucurbit plants was characterized by high virulence and a broad host range. It infected various plant species, including tomatoes, cucumbers, radishes, basil, grapes, alfalfa, onions, spinach, barley, celery, and chard, with a 100% infection rate.
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Copyright (c) 2025 Copyright (c) 2024 is the Author's article. Published by the Journal of Kerbala for Agricultural Sciences under a CC BY 4.0 license
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