Effect of Coriander Ethanolic Extract and Beauveria bassiana on the Growth of Fusarium solani and pythium digitatium in Potato Crop

Abstract

This study was conducted at the laboratory of the Striga Research (Jica), College of Agricultural Studies, Sudan University of Science and Technology 2016.The aim of this study was to evaluate the effects of Coriander ethanol extract, Beauveria bassiane and Fungicide Store against the growth of Fusarium solani and pythium digitatium in culture media Potato Dextrose Agar (PDA) in vitro and in vivo. The fungi are an important in causing significant reductions in yield. In the present study, the pathogenic fungi were isolated from infected plant parts. The fungi were identified based on morphological and cultural characters as Fusarium solani and pythium digitatium. Studies were conducted four concentrations of coriander ethanol extract (100%, 50%, and 25% and 12.5%) in addition to the control treated with distilled water. The results showed that all concentrations exhibited and has an inhibitory effects on the growth of the fungus tested compared to control. The highest inhibition effect was obtained at12.5% (93,86,86 and97) concentration compared by control. Generally, the inhibition zone increase with the decrease in concentration of the extract. In conclusion, this study showed that coriander seeds contain antifungal properties that could be investigated in further studies. Also the use of Beauveria bassiane to inhibit the growth of Fusarium solani and pythium digitatium was gave positive result as biological control compared to control. Also the used of fungicide Score to inhibit the growth of Fusarium solani was gave the highest inhibition. The chemical control method was found to be the best among all methods used against the fungus. Moreover, botanical and biological control methods were also promising. The overall results suggest the development of an integrated management strategy where chemicals could be combined with botanicals and /or biological methods. Such strategy may decrease rates of the fungicides and consequently cost and increased environmental safety.