Efficiency of Cinnamon and Thyme Extracts against Bean Root Rot Pathogens with the Presence of some Biological Control Agents
الباحث الأول:
Usamah A. Alkarim A. Almunam Alshimaysawe1
الباحثين الآخرين:
Hayder Abdulhasan Ali2†, Akeel E Mohammed1*† and Firas Hadi Al-Haidary1
المجلة:
INTERNATIONAL JOURNAL OF AGRICULTURE & BIOLOGY
تاريخ النشر:
9 إبريل، 2024
مختصر البحث:
Root rot fungal pathogens cause destructive diseases and threaten broad beans particularly in favorable environmental conditions. Experiments of current study were carried out to examine the efficiency of extracts of both cinnamon and thyme on the g…
Root rot fungal pathogens cause destructive diseases and threaten broad beans particularly in favorable environmental conditions. Experiments of current study were carried out to examine the efficiency of extracts of both cinnamon and thyme on the growth of pathogenic fungi Rhizoctonia solani and Macrophomina phaseolina that cause root rot disease on broad beans in the presence of some biocontrol fungi namely Trichoderma harzianum 1, Trichoderma harzianum 2 and Paecilomyces. Results indicated that R. solani and M. phaseolina isolated from bean roots reduced broad beans seed germination by over 40% compared to the control treatment and other biocontrol fungi used in the study. Moreover, the severity of infection of broad bean plants by R. solani was higher than M. phaseolina. A comparison was made between the unsterilized and heat-sterilized powdered extracts for both cinnamon and thyme plants. The outcomes of the study showed that adding unsterilized and heat-sterilized cinnamon powder extract individually reduced the radial growth of both pathogenic and biocontrol fungi in Petri plates. Compared to the other studied fungi, the biocontrol fungus (Paecilomyces) was the most affected in terms of radial growth rate by the unsterilized and heat-sterilized cinnamon and thyme powder extracts. The radial growth of Paecilomyces in both heat-sterilized cinnamon and thyme powder extract treatments was 1.69 and 1.51 cm, and for the unsterilized extract, it was 1.69 and 1.73 cm, respectively. Results showed no significant differences between adding unsterilized and heat-sterilized cinnamon powder extract. However, the results indicated significant differences between adding unsterilized and heat-sterilized thyme powder extract. Furthermore, the results showed that the radial growth inhibition of fungi increased with increasing concentrations of extracts of both plants, whether unsterilized or heat-sterilized. The study proved that high temperatures did not significantly affect the effectiveness of powdered from both plants studied extracts against the pathogenic fungi.
