Abstract:
This study was conducted at the Faculty of Agricultural Studies, Sudan University of Science and Technology, in October 2018, to study the effect of the alcoholic extracts of the leaves of mesquite (Prosopisjuliflora) and the fungicide Amistar top on the growth of the Fusarium oxysporum. The Mesquite tree is a family of legumes. It is found throughout the year in South America. It spreads in large areas in Sudan and has swept most of the agricultural land, which is now threatened by agriculture and biological diversity.The pathogen was isolated from a pure environment obtained from the Plant Pathology laboratory. Three concentrations of 25%, 50% and 100% were used for each of the three extracts and 20% of the fungicide (Amstartop) in addition to the control
The results showed that all the extracts of the leaves of mesquite and especially the high concentration 100% were optimal in inhibiting the growth of fungi by 1.5. Of the three concentrations of leaves 100%, was found to be optimal in inhibiting the growth of fungi and the Amstar top® (1.0) with a concentration of 20% compared to the control. When comparing all the treatments, it was found that the extracts of the leaves (25, 50 and 100%), fungicide the Amstar top® (1.8, 1.7, 1.5 and 1.0) respectively showed results in inhibiting the growth of the fungus. The results obtained from the leaves extracts are promising and encouraging for chemical analyzes of various parts Mesquite tree using different extracts to identify the active substance in each of these parts and use them as alternatives to the use of harmful pesticides and harmful to human health, animal and environment.
