Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars
Zaki, S., Ouf, S., Aly, A., Abd-Elsalam, K. (2021). Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars. EKB Journal Management System, 61(3), 911-921. doi: 10.21608/ejbo.2021.86922.1742
Shimaa A. Zaki; Salama A. Ouf; Aly A. Aly; Kamel A. Abd-Elsalam. "Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars". EKB Journal Management System, 61, 3, 2021, 911-921. doi: 10.21608/ejbo.2021.86922.1742
Zaki, S., Ouf, S., Aly, A., Abd-Elsalam, K. (2021). 'Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars', EKB Journal Management System, 61(3), pp. 911-921. doi: 10.21608/ejbo.2021.86922.1742
Zaki, S., Ouf, S., Aly, A., Abd-Elsalam, K. Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars. EKB Journal Management System, 2021; 61(3): 911-921. doi: 10.21608/ejbo.2021.86922.1742

Fungi Involved in Damping-off of Cotton Seedlings and Their Differential Pathogenicity on Two Cotton Cultivars

Egyptian Journal of Botany
Article 39, Volume 61, Issue 3, December 2021, Page 911-921  XML PDF (1.24 MB)
Document Type: Regular issue (Original Article)
DOI: 10.21608/ejbo.2021.86922.1742
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Authors
Shimaa A. Zaki email 1; Salama A. Ouf2; Aly A. Aly1; Kamel A. Abd-Elsalam1
1Plant Pathology Research Institute, Agricultural Research Centre (ARC), Giza, Egypt
2Microbiology, Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, Egypt
Abstract
FOR THIS STUDY, samples were collected from seedlings infected with damping-off or root rot in adult cotton plants from different locations in the Giza governorate. The samples yielded 25 fungal isolates. The isolates were identified as Rhizoctonia solani (44%), Fusarium spp. (44%) and Macrophomena phasolina (12%). In the pre-emergence stage of the cotton seedlings, 24 fungal isolates were pathogenic on cultivar Giza 90, while all fungal isolates were pathogenic on Giza94 compared to the control. On Giza90, F. fujikuroi F10 (80%), R. solani RS9 (100%), M. phasolina M4, and M12 (34%) were the most pathogenic isolates. On Giza 94, F. fujikuroi F10 (100%), R. solani RS9 (100%), M. phasolina M4 (64%) were the most pathogenic isolates. In the post-emergence stage of Giza 90, Fusarium isolate F1 (22%), R. solani RS11 (18%), M. phasolina M4, and M12 (48%) were the most pathogenic isolates. On Giza 94, Fusarium isolate F1 (16%), R. solani RS4 (14%), and M. phasolinaM4 (24%) were the most pathogenic isolates. All fungal isolates were pathogenic and decreased the survival percentage of the two cultivars. On Giza 90, F. fujikuroi F10 (0%), R. solani RS9(AG2-2) (0%), and M. phasolina M4 (18%) were the most effective isolates in decreasing survival. On Giza 94, F. fujikuroi F10 (0%), R. solani RS9(AG2-2) (0%) group, and M. phasolina M4 (16%) were the most effective isolates in decreasing survival. The most effective fungal isolates that decreased plant height and dry weight for both cultivars were F. fujikuroi F10, RS9(AG2-2), and M4.
Keywords
Cotton seedling damping-off; Fusarium sp; Macrophomena phasolina; Pathogenicity test; Rhizoctonia solani
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