Control of corky root of tomato cultivated under rain shelter by soil reduction

Abstract

Control of tomato corky root by soil reduction was examined. Corky root was controlled effectively by the treatment for 7 days early in June, and for 40-50 days in mid-October with an altitude of 450 meters (Nakatsugawa-shi, Gifu). In a practical experiment with an altitude of 750 meters (Nyukawa-mura, Gifu), corky root was controlled effectively by the treatment for 23 days early in May. Disease severity of the root in a treatment field was less than that in a control, and the yield of tomato was superior to that in a control after three years of the treatment.