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

References
Colony on seed is shiny dark
brown to black, composed mainly
Conidiophores are pale to dark
brown, short, erect, in most cases
Conidia appear black and shiny
under low magnification, but under
Chidambaram, P., Mathur, S.B.,
of dense masses of conidiophores
single, solitary or in small groups,
higher magnification they are dark
and Neergaard, P. 1973.
Identification of seed-borne
Drechslera species. Friesia 10:
165-207.
and conidia.
straight or alternately bent, up to
220 ~m long, 6-1 0 ~m thick and
bearing 1-6 conidia at short
distances in the upper half.
olive brown. Conidia are large,
thick-walled, typically have five to
nine cells, may be straight or
slightly curved, and are
characteristically somewhat
CMI. 1981. Descriptions of
Pathogenic Fungi and Bacteria
No. 701 . Cochliobolus sativus.
CAB, UK.
Conidia are curved to straight,
dark olive-brown, smooth ,
broadest in middle, ends rounded,
scar clear within the basal cell,
terminal part of end cells
barrel-shaped.
McGee, D.C. 1988. Maize
subhyaline, 3-12 (mostly 6-10)
Diseases: A Reference Source
septate and 40-120 x 17-28 ~m.
for Seed Technologists. APS
Press, USA.
Pseudothecia are brown to black,
flask-shaped, and up to 530 ~m
Zillinsky, F.J. 1983. Common
Diseases of Small Grain
broad with a protruding beak 80­
110 ~m long.
Cereals: A Guide to
Identification. CIMMYT, Mexico.
Asci are cylindrical to clubshaped,
1-8 spored, and measure
110-230 x 30-45 ~m.
Ascospores are slender and
thread-like, hyaline to light brown,
6-13 septate, and measure 160­
360 x 6-9 ~m .
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