Influence of antagonistic micro-organisms on the growth of strawberry plants in the presence of Verticillium dahliae and Phytophthora cactorum

摘要

Soil borne diseases are an increasing problem in organic strawberry production. In a national founded project, a strategy for biological control of Verticillium spp. and Phytophthora spp. was investigated. After an in vitro selection, four antagonistic microorganisms (Trichoderma harzianum, T. atroviride, Metarhizium anisopliae and Bacillus subtilisj were tested in greenhouse and field trials (2010-2011) in the presence of V. dahliae and P. cactorum. In greenhouse experiments the growth of strawberries in the presence of V. dahliae could be positively influenced by the antagonist. But these results were not confirmed by first field trials. In case of P. cactorum inoculation, neither in greenhouse nor in field trials differences could be observed.