Abstract

In the current study, abiotic agents (salicylic, oxalic, and benzoic acid) were used to examine the antifungal activity of these agents against maize root rot pathogens (F. oxysporum, F. solani or R. solani) in vitro. For these reasons, the experiments were done in the laboratory. Activity of antioxidants (salicylic, oxalic, and benzoic acid); pathogenic fungi there are significant differentiations among antioxidants and their concentrations. The linear growth of F. oxysporum, F. solani, and R. solani was decreased with increasing the concentration of antioxidants. in other meaning, there is an inverse relationship between increasing conc. of antioxidants and the growth of the examined pathogenic fungi. Generally, the minimum growth of three tested pathogenic fungi appeared under the high concentration of salicylic acid then a high oxalic level the high concentration of benzoic.   Study of the tested fungicide, generally there is a negative relation between increasing the conc.  of fungicide Tolex 500 wpm from 0 to 100 ppm and the linear growth of all studied pathogenic fungi. The high level (100 ppm) of fungicide suppressed the growth of all examined fungi. Also, there were variances in the sensitivity of the pathogens to fungicide concentrations; with F. solani being the most sensitive fungus.

Keywords

Pathogens- Antioxidants- Fungicide Tolex 500 wpm