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

References
Colony on seed grows fairly
Conidiophores are single or in
Conidia are straight or slightly
rapidly and appears grey in colour;
small groups, short, straight or
curved, broader in the middle with
CM!. 1990. Descriptions of
with little white aerial mycelium
slightly bent, pale to mid brown,
rounded ends, dark scar within the
Pathogenic Fungi and Bacteria
and a large number of
smooth, cylindrical, septate, up to
basal cell and 3-9 septa.
No. 1001. Cochliobolus
cynodontis. CABI , UK.
conidiophores arising from the
seed surface or the blotter.
170 ~m long, and 5-7 ~m thick.
Conidia are mostly slightly curved,
Note: Germination of conidia is
from both ends, but the end
Chidambaram, P., Mathur, S.B.,
and Neergaard, P. 1973.
Identification of seed-borne
Drechslera species. Friesia 10:
165-207.
sometimes almost cylindrical,
usually broadest in the middle
tapering towards the rounded
ends, pale to mid golden brown,
smooth, dark scar within the basal
cell, 3-9 (commonly 7-8) septate,
cells sometimes swell to form a
more or less spherical, thinwalled
vesicle from which the
germ tubes may originate.
Nelson, R.R. 1964. The perfect
and measure 30-75 x 1 0-16 ~m .
stage of Helminthosporium
cynodontis. Mycologia 56: 64-69.
Pseudothecia are black, spherical
or an oval curve, 280-460 x 230­
400 ~m with an inverted cone
shaped beak (30-90 ~m long).
Asci are cylindrical to clubshaped,
short-stalked, 140-210 x
16-28 ~m with 1-8 ascospores.
Ascospores are slender and
thread-like, colourless, 3-9
septate, 160-320 x 5-10 j.Jm, and
tightly coiled inside the ascus.
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