Table 2.

Morphological comparison of the structures of seven Fusarium species associated with ear rot of maize obtained from symptomatic and symptomless ears during fall to winter 2002 in Montecillo, Mexico

Morphological characteristics	Gibberella fujikuroi complex					F. poae*,**	F. solani**
	F. napiforme**	F. pseudonygamai*,**	F. subglutinans*,**	F. verticillioides*,**	F. chlamydosporum*,**
Microconidia (length × width in μm)	9.8 × 5.0a, 10.2 × 2.4b, 19.25 × 3.9c	11.1 × 2.42, 5.0−13.8 × 1.9−4.0	11.32 × 3.1, 8−12 × 2.5–3	11.8 × 2.4, 5.0−12.0 × 1.5−2.5	9.7 × 3.3	11.46 × 7.0, 8−12 × 7−10d	9.5 × 3, 8−16 × 2−4
Microconidia in chains	+	+ (short)	−	+	−	−	−
False heads microconidia	+	+	+	+	−	−	+
Mesoconidia	−	−	1−3 septate	−	0−3 septate.O	−	−
Shape and size (length × width in µm)			17.0 × 4.5		11.0 × 4
Macroconidia (length × width in µm	43.5 × 3.8	39.0 × 4.0	37.4 × 4.2	31.0 × 3.7	40.4 × 3.5	22.1 × 3.6	50.3 × 5.0
Conidiophore	Branched	Single or branched	Branched	Single or branched	Branched	Branched	Branched
Phialides (length × width in µm	Monophialide	Monophialide	Monophialide	Monophialide	Monophialide Polyphialide	Monophialide	Monophialide
	27.0 × 3.0	26.0 × 2.43	23.5 × 2.7	22.0 × 3.5	26.7 × 2.7	14.0 × 6.0	45.0−73.0 × 2.4
		Polyphialide	Polyphialide		Polyphialide
Chlamydospores	+	−	−	−	+	−	+
Coloure	White/purple	White/orange, gray	White purple/pink-purple	Purple gray/pink-purple	brown/brown	White pink/orange	Light cream/light cream
Isolates	2, 4, 6	10B, 13A, 13B, 18, 19	9, 11, 14	5, 10A	16, 17	12, 15A, 15B	3, 7, 8

*Isolates obtained from 100 symptomless kernels.

** isolates obtained from symptomatic kernels.

^aNapiform conidia with 0–1 septate.

^bOvoid conidia with 0–1 septate.

^cOvoid conidia with 1–3 septate.

^dAmpuliform conidia

^eSlant tubes containing PDA with amended potato pulp.