ISHS Acta Horticulturae 133: Nutrient Film Technique and Substrates, XXI IHC
POTENTIAL DANGER FOR INFECTION AND SPREAD OF ROOT DISEASES OF TOMATOES IN HYDROPONICS |
| Authors: | A. Vanachter, E. Van Wambeke, C. Van Assche |
| Abstract:
With the introduction of growing plants on artificial substrates and in nutrient solutions, pathogenic problems of the roots, the collar and the vascular system arised in a particular way. From literature and the practical situation we know these problems for e.g. Fusarium, Phytophthora and Didymella. Especially in NFT systems, there is a great danger of disease spread from a primary infection. In this study possibilities for infection and control of different fungi in tomato crops were studied. This was done for : Fusarium oxysporum f.sp. lycopersici race 1 and 2, Pythium ultimum, P. debaryanum, P. sylvaticum and Phytophthora nicotianae var. nicotianae. To control the Pythiaceous fungi, metalaxyl was used in concentrations ranging from 5 till 40 ppm a.i. in the solution. Data about disease control, phytotoxicity, stability in the solution and residues in the tomato fruits are discussed. | |
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