Reject the shipment or discard infected plants. Water in a manner that keeps leaf surfaces dry. This prevents spreading the spores and inhibits infection by spores already on the plant surface. If few leaves are affected, remove them. Thielaviopsis Root Rot Late in the season, roots turn black as dark microscopic spores from in the cells.
Longitudinal splits form at the stem base at and below soil line.
Leaves yellow and fall. Thielaviopsis basicola Use pasteurized soil and clean tools, and hang up hose ends.