Abstract:
Increasing hazards to public health and environment due to indiscriminate use of synthetic pesticides coupled with development of resistant strains of phytopathogenic fungi has initiated the exploration of safe alternate product. A good number of reports outlined the antimicrobial effects of some plants extracts for plant disease control. This study was conducted at the Plant Pathology Laboratory, Faculty of Agricultural Studies, Sudan University of Science and Technology January 2018; to investigate, under laboratory conditions, the bioactivity of alcoholic extracts of some parts of mesquite plant namely, fruits, leaves and bark plus Fungicide Amistar top against the growth of Fusarium wilt fungus of chick pea. Three concentrations of 5%, 10% and 20% of each of the three extracts of mesquite tree parts and 100 % concentration of fungicide Amistar Top in addition to control were used in this study. The results showed that all extracts had a significant inhibitory effect on the growth of the fungus. Among the three extracts, those of leaves and bark, especially concentration of 20%, were found to be superior in inhibiting the growth of the fungus by 61.8 % and 71.8 % respectively compared to control. When comparing all the treatments, it was found that the extracts of the leaves and bark of the Mesquite tree in addition to Amistar top fungicide were exhibited superior inhibitoryon the growth of the fungus by 61.8% ، 65% ، 71.8%and100%respectively compared to control. The results also showed that effectiveness of the extract was directly proportional to its concentration. The results obtained from this study are promising and encouraging carrying out further chemical analyzes of various parts of the Mesquite tree using different extracts to identify the effective ingredient in each of these parts to use it as alternatives to harmful pesticides that adversely affect human, animal and environmental.
