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Home > Archives > Volume 20, No 11 (2022) > Article

DOI: 10.14704/NQ.2022.20.11.NQ66280

Evaluating the efficacy of Penicillium cyclopium against the pathogens of okra root rot disease in Babylon province

Caesar Hamza Al-Taie, Ahmad Kadhim Abdul–Hdi

Abstract

The results of the field survey showed the spread of okra root rot disease in all the surveyed areas. The results of isolation and diagnosis showed the presence of 6 fungal isolates associated with okra roots, differing in appearance in different regions. As the fungus Fusarium solani achieved the highest percentage of appearance, it appeared in all samples with a percentage of 80%, followed by the fungus Macrophomina phaseolina with an appearance of 44%, and the fungus Rhizoctonia solani recorded an appearance of 21%. The results test for pathogenicity showed that all the tested fungi caused a significant reduction in the germination percentage of radish seeds. The results of the test showed the effect of F.spp (FA3, FK2, FA1, FR1, FD2, FC1) fungus isolates and M.phaseolina (MB1, ME1) and R.solani (RR1) fungi isolate on germination of okra seeds, it was superior to (FA3, ME1) in the infection of okra plants, the percentage of infection severity reached (88.3, 85)%, compared to control treatment, which reached the severity of infection to 0%. The study showed that the fungus Penicillium.cyclopium has a high antagonistic ability against the pathogenic fungi, where the degree of antagonism ranged between (1,2). The lath house results showed that P.cyclopium fungi dominated the pathogenic fungi F.solani and M.phaseolina, with the severity of infection reaching (31.66, 33.3)%, respectively, compared to the treatment of pathogenic fungi alone, which amounted to (77.52 and 83.44%, respectively). Also, the interaction treatment between the biological fungus and the pathogenic fungi in the field experiment achieved control in the severity of the infection and an increase in the growth parameters compared to the treatment of pathogenic fungi alone.

Keywords

Penicillium cyclopium, okra root rot disease, Okra plant, Hibscus esculentus

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