Study about filamentous fungi in the cultivation of strawberry plant in three crops under ecological planting

Abstract

The strawberry plant is cultivated in Rio Grande do Sul predominantly in small properties, for consumption in natura and industrial. This study aimed to isolate and to select fungi possibly antagonist towards the pathogens, to identify the occurring patho gens and to determine in vitro the antagonistic action to the pathogens. The filamentous fungi from the soil, epiphytes and endophytes from strawberry trees have been isolated, in three crops under ecological management, in the cities of Feliz and Alto Feliz. Soil, leaves and flowers of plants without symptoms of diseases have been collected, monthly, from April to November of 2002. The following species have been identified: Alternaria alternata, Aspergillus niger, Athelia sp., Cladosporium cladosporioides, Epicoccum purpu rascens, Fusarium sp., Gliocladium roseum, Paecilomyces variotti, Penicillium commune, Phomopsis obscurans, Torula sp., Tricho derma harzianum, Trichoderma koningii, Trichoderma viride, Xylaria sp. In vitro tests have showed antagonistic activity of T. harzi anum and T. koningii to A. alternata and P. obscurans; P. variotti has been antagonic to A. alternata.