Plant immunization compositons

摘要

The present invention provides an agent for inducing resistance against phytophathogenic microorganisms in plants wherein the agent is an extract of biomass from non-plant-pathogenic microorganisms obtainable by the following process: a) resuspending 50 g to 200 g (dry weight) of biomass from non-plant-pathogenic microorganisms per liter of inorganic or organic solvent; b) stirring at room temperature for 1 to 12 hours; c) incubating; d) resuspending; e) allowing to cool to room temperature; and f) optionally filtering.