Increased Cation Content in Recirculating Nutrient Solutions as a Means for Controlling Dissemination and Attack of Root Rot in Glasshouse Crops

摘要

The use of recirculating nutrient solutions for irrigation and fertilization of greenhouse crops has been gaining importance for Scandinavian potted plant production. The systems utilize the "ebb-flood" principle and they are economically as well as environmentally advantageous, but they introduce a risk for spreading of root pathogens. Pathogenic soil-dwelling organisms, predominantly fungi can be disseminated with zoospores and cause infections in many greenhouse plants. Therefore alternative control measures are needed.