Effect of Fluazinam Soil-drench on White Root Rot of Grapevine.

Abstract

The effect of fluazinam WP (active ingredient 39.5%, trade name: Frowncide SC) on white root rot (causal agent, Rosellinia necatrix) of grapevine was examined in the vineyard. Fluazinam soil-drench at either 790ppm or 395ppm showed high efficacy against white root rot of grapevine. Treatment with fluazinam at 790ppm after harvest time (October-December) was more efficient than treatment before sprouting time (March). The treatment protected grapevine roots from the disease for at least half a year even in highly infested soil, and was not phytotoxic against grapevine.