Etude comparative de l’infection des sols par quelques champignons pathogènes en conditions de semis direct et de travail conventionnel

Abstract

The diversity and abundance study of plant pathogenic fungi in soil conducted in-direct seeding (no tillage) plant pathogenic fungi pathogenic fungi compared to conventional system was studied through the analysis of various soil samples from different plots with different cropping history and function two horizons. In terms of diversity, the results indicate the presence of nine genera of fungi and opportunistic pathogens such as Fusarium, Aspergillus, Penicillium, Rhizopus, Alternaria, Blumeria, Erysiphe, Helminthosporium and Cladosporium. In terms of abundance, the results show a difference in species richness and number of fungal pathogens as systems of farming practice. We found that direct seeding promotes the growth of fungi, particularly Fusarium. Furthermore, the choice of culture and its location in the rotation is an important element in this distribution, because the plot line for 4 years in monoculture was the most infected compared to other plots.