ISHS Acta Horticulturae 98: Symposium on Research on Recirculating Water Culture
THE EFFECTS OF PATHOGENS AND FUNGICIDES ON TOMATOES IN A HYDROPONIC SYSTEM |
| Authors: | W.P. Staunton, T.P. Cormican |
| Abstract:
Four pathogens were tested for their ability to cause disease in tomatoes grown in nutrient solution. The pathogens were Didymella lycopersici, Colletotrichum coccodes, Spongospora subterranea and Corynebacterium michiganense. Of these only Didymella inoculum caused disease to develop on plants grown in pathogen infested nutrient solution. These results support previous findings that growing tomatoes in nutrient solution does not pose any extra disease hazard over that of growing in other media. Twelve fungicides both alone and in combination at varying rates placed in the nutrient stream were observed for phytotoxic affects on tomatoes. It was not possible to assess the value of these fungicides for disease control because of the difficulty in creating disease epidemics. A combination of etridiazole (20 ppm) or ethyl phosphonate (40 ppm) and carbendazim or benomyl (40 ppm) placed in the nutrient solution is suggested in the event of disease outbreak in NFT systems. | |
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