Seed Testing of Maize and Wheat A Laboratory Guide - Search ...

References
Colony on seed is peach to
orange or light brownish yellow,
Microconidia are generally absent.
The most distinguishing
characteristic of F. sambucinum is
CMI. 1973. Descriptions of
and in some isolates wine­
Macroconidia are produced initially
the shape of the macroconidia
Pathogenic Fungi and Bacteria
coloured to reddish brown.
from conidiophores in the aerial
with a distinguishing "bird's beak"
No. 385. Gibberella pulicaris.
CAB, UK.
Aerial mycelium has white cottonlike
groups or tufts tinged with
mycelium and later from a
cushion-shaped cluster of
conidiophores. Macroconidia are
appearance at the apical cell.
The macroconidia resemble those
Booth, C. 1971. The Genus
Fusarium. CMI, UK.
rose.
hyaline, curved, with a pointed
apical cell and well-developed foot
cell, 3-5 septate, and measure 35­
of F. culmorum in length but they
are thinner and the constriction
and/or curvature of the apical cell
Booth, C. 1977. Fusarium
55 x 4-6 j.Jm.
is more pronounced.
Laboratory Guide to the
Jdentification of the Major
Species. CMI, UK.
Chlamydospores form infrequently
as single spherical cells, 6-11 j.Jm
in diameter, either at intervals
The shorter length of
macroconidia and the presence of
a small projection tip of the apical
Nelson, P.E., Toussoun, T.A. , and
Marasas, w.F.O. 1983.
Fusarium Species - An
Illustrated Manual for
along hyphae, terminal on short
lateral branches or in the cells of
the macroconidia, or later form in
chains or clumps.
cells distinguish the macroconidia
from F. crookwellense.
Identification. The Pennsylvania
State University Press, USA
and London.
Perithecia are inverted pearshaped
to spherical, and 180-200
j.Jm in diameter. Asci are
club-shaped, thin-walled with a
slightly thickened apex (70-110 x
11-16 j.Jm) and contain 6-8 spindlelike,
curved ascospores with slight
constriction at 3 septa and
measuring 20-28 x 6-9 j.Jm.
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