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

DOI: 10.14704/NQ.2022.20.11.NQ66303

Evaluation of the efficiency of the Azotobactar chroococcum and Penicillium cyclopium and some plant extracts in controlling pepper root rot disease under laboratory and lath house conditions

shimaa Abd Al-Ameer, Ahed Abd Ali Hadi Matloob


The study aimed to survey pepper root rot disease in some fields of Babylon province, isolate and diagnose the fungi that cause the disease, and evaluate the efficiency of some biological control agents against pathogens in the laboratory and under lath house conditions. The results showed the presence of the disease in all areas covered by the survey, with infection rates ranging between 20-60%. The fungi, Fusarium solani and Macrophamina phaseolina, was causing agent of disease. The results showed that Penicillium cyclopium and Azotobacter chrocooccum bacteria had a high antagonistic ability against the pathogenic fungi F.solani and M.phaseolina. The results of the antagonism of the aqueous extracts of plants used in the study (Cariza, Schanginia, wild mustard, and Cinnamon) in the concentration (5,10,15%) against the pathogenic fungi. The results of the wooden canopy experiment showed that the interaction treatment of A. chrocooccum and P. cyclopium and the extract of the cinnamon reduction the disease incidence and severity of infection with the pathogenic fungi F.solani and M.phaseolina, where the disease incidence and severity reached 23.33-21.67% and 33.33 % respectively, compared to treatment with pathogenic fungi alone The disease incidence 100% and severity 81.67-83.33%. All treatments achieved a significant increase in the average of height, wet and dry weights and the percentage of seed germination in the woody canopy. The interaction treatment with A.chrocooccum bacteria and the P.cyclopium and the extract of cinnamon enhancement growth parameters compared to the control treatment.


Pepper, Root rot, Cinnamon, Biological control, Pathogenic fungi

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