Table 4. Fitness of CAA-resistant and -sensitive isolates of Phytophthora melonis in vitro.

Isolates a	Mycelial growth (mm)b	Zoospore production (×105/cm2)	Lesion area on cucumber leaves (mm2)	CFIc (×105)
TJ-58	77 c	1.53 a	370 d	43566 ab
F58-1	73 e	1.30 abcd	398 bc	37728 bc
F58-3	72 e	1.22 bcd	380 cd	33684 c
F58-4	74 de	1.44 ab	383 cd	40980 abc
D58-2	81 a	1.41 abc	420 ab	47483 a
D58-3	76 cd	1.20 bcd	425 a	38712 abc
D58-5	77 c	1.16 cd	383 cd	34205 c
I58-1	80 ab	1.13 d	420 ab	37743 bc
I58-2	73 e	1.28 abcd	398 bc	36977 bc
I58-3	78 bc	1.35 abcd	368 d	38660 abc
63	78 c	0.76 a	555 c	32988 ab
F63-1	73 f	0.42 c	532 c	16296 e
F63-3	76 de	0.48 bc	473 d	17381 e
F63-5	75 e	0.75 a	476 d	27014 abc
D63-1	76 de	0.42 c	462 d	14893 e
D63-2	77 de	0.53 bc	457 d	18652 de
D63-8	81 b	0.51 bc	476 d	19648 cde
I63-2	83 a	0.39 c	583 b	18784 de
I63-5	77 cd	0.62 ab	542 c	25872 bcd
I63-9	72 f	0.76 a	621 a	34020 a
70	87 c	0.87 a	575 d	43719 a
F70-1	82 e	0.74 b	497 e	30125 cd
F70-5	91 a	0.58 de	619 bc	32809 bc
F70-11	83 e	0.70 bc	561 d	32795 bc
D70-1	87 cd	0.53 e	639 b	29280 cd
D70-5	79 f	0.68 bc	681 a	36690 b
I70-1	89 b	0.52 e	567 d	26310 d
I70-5	85 d	0.53 e	564 d	25505 d
I70-9	87 cd	0.63 cd	607 c	33155 bc

^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.