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Fusarium Wilt of Tomato: Interaction of Soil Liming and Micronutrient Amendments on Disease Development. John Paul Jones, Associate Professor of Plant Pathology, University of Florida, Gulf Coast Experiment Station, Bradenton, Florida 33505; S. S. Woltz, Professor of Plant Physiology, University of Florida, Gulf Coast Experiment Station, Bradenton, Florida 33505. Phytopathology 60:812-813. Accepted for publication 5 December 1969. DOI: 10.1094/Phyto-60-812.

A hydrated lime + ground limestone soil amendment increased the pH of the soil solution to 9.0 and reduced the incidence and severity of Fusarium wilt of tomato caused by F. oxysporum f. sp. lycopersici race 2. However, soil additions of Mn + Zn or Fe + Zn lignosulfonates, which are available for plant growth at pH 9.0, reversed disease control given by the lime amendment with an increase in the incidence and severity of wilt.