Percent recovery (over four sampling periods) of mutant strains (Mut-A, ▪; Mut-B, Δ; Mut-C, +; Mut-ABC, ○) or WT T3 (⧫) from lesions of plants coinoculated with individual mutant strains or WT T3 and a T1 strain in the field. A, spring 2001; B, fall 2001. DAT stands for days after transplanting.