POTENTIAL DANGER FOR INFECTION AND SPREAD OF ROOT DISEASES OF TOMATOES IN HYDROPONICS

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.

Nutrient Film Technique and Substrates, XXI IHC

A. Vanachter, E. Van Wambeke, C. Van Assche

https://doi.org/10.17660/ActaHortic.1983.133.12