Efficacy of Seed Treatments With Some Fungicides Against Bean Root Rot Caused By Rhizoctonia solani

This study evaluated the effect of some fungicides on emergence, disease severity and seedling growth of bean plants against root rot disease of bean caused by Rhizoctonia solani. Among the seed treatment fungicides, sedaxane was the most effective fungicide, which increased the emergence of bean seeds at a rate of 93.33% and yielded a 44% decrease in disease severity compared with those of pathogen-inoculated control. Similarly, fungicides with fludioxonil and azoxystrobin active ingredients yielded 86.67% and 73.33% increase in emergence, and a 32% and 30.67% decrease in disease severity, respectively. The fungicides with trifloxystrobin and difenocanozole active ingredients were moderately effective and prevented 18.67% and 20 % of disease severity, respectively. However, the fungicides with thiram, acibenzolar-s-methyl and propineb active ingredients have no effect on emergence and disease severity. The fungicides with sedaxane, fludioxonil and azoxystrobin active ingredients have similar effect on seedling growth compared with the growth the control seedlings. The result showed that fungicides alone or combination applications will be beneficial to reduce yield losses, caused by Rhizoctonia root rot on bean