TABLE 2.

Features differentiating Colletotrichum acutatum from C. gloeosporioides and C. coccoides

Organism	Colony morphologya	Rate of growth	Tempb (°C)	Conidial morphology	Conidial dimensions (μm)	Spore mass color	Reference(s)
C. acutatum	Superficial mycelium gray; sclerotia absent or poorly developed, rare; carmine pigment in agar	Slow	33 max, 25-26.8 opt	On massed conidiophores in the nature of acervuli; also formed from single phialides; variably shaped, mostly short, narrow, with pointed ends	8.5-16.5 × 2.5-4	Salmon to dark orange	6, 31
UTHSC 00-564	Initially white, later gray with yellow sectoring; intense carmine diffusing pigment; no sclerotia or setae	Slow	25 optc	As above	6.0-15.0 × 2.5-3 (aerial mycelium); 3 × 12 mean (spore masses)	Orange
C. gloeosporioides	Superficial mycelium white to gray; sclerotia large and abundant; medium not pigmented	Fast	35.5 max, 25-26.5 opt	On massed conidiophores in the nature of acervuli; broad, oblong, rounded ends	10-16 × 4-7; 13.8 × 4.8 mean	Salmon	6, 31
C. coccoides	Scant superficial mycelium; medium pigmented pale salmon to pale brown; sclerotia large and abundant; setae present	Fast	24-28 opt	On sclerotia, pointed ends, straight; consistently medianly constricted	16-22 × 3-4	Honey	6, 33

^aOn potato flakes agar.

^bMaximum (max) and optimum (opt) temperatures.

^cOptimum temperature 25°C; reduced colonial diameter at 30°C; no growth at 35 or 40°C.