Fitness of CAA-resistant and -sensitive isolates of Phytophthora melonis in vitro.

aIsolates in bold font are parents of the resistant isolates listed under them in regular font. Isolates starting with the letter F, D, and I, are flumorph-resistant mutants, dimethomorph-resistant mutants, and iprovalicarb-resistant mutants, respectively.bFor each parent and its resistant progeny, means followed by same letters are not significantly different according to Fisher’s least significance difference (α = 0.05).cCFI (compound fitness index) = mycelial growth × zoospore production × lesion area on cucumber leaves.