Assessment of the Effect of Biopesticides ASTOUN 50 EC and NOSTAG 50 EC on Fusarium Wilt Pathogen (Fusarium sp.) and on Some Agro-morphological Parameters of Common Bean (Phaseolus vulgaris L.)

Abstract

Fusarium wilt caused by the fungus Fusarium sp. is rife in all common bean production areas in Côte d'Ivoire. It causes wilting and/or death of plants and yield losses. Chemical control is the most widely used method against this pathology. But the misuse of this method results in environmental pollution, pathogen resistance and human health problems. The search for an alternative solution to chemical control is necessary. It is in this context that this study was initiated. It aims at assessing in vitro and on-farm the effectiveness of the bio-pesticides ASTOUN 50 EC and NOSTAG 50 EC against common bean fusarium wilt pathogen. For this purpose, in vitro, five (5) doses (100, 200, 500, 1000 and 2000 µL/L) of each of the two biopesticides were tested by the method of incorporation into the PDA medium. Under natural conditions, the IC90 and MIC of each bio-pesticide were tested. The results showed that the two bio-pesticides completely inhibited the mycelial growth of Fusarium sp. at doses of 500 μl/L. NOSTAG 50 EC showed an IC90 at 300 μl/L and ASTOUN 50 EC at 400 μl/L. The biopesticides, on-farm, influenced the germination and growth parameters and reduced the wilting of the plants. In short, the 500 μl/L dose of the two biopesticides can be recommended in fusarium wilt control.