Seed Testing of Maize and Wheat A Laboratory Guide - Search ...
Seed Testing of Maize and Wheat A Laboratory Guide - Search ...
Seed Testing of Maize and Wheat A Laboratory Guide - Search ...
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References<br />
Colony on seed is moderately fast<br />
growing <strong>and</strong> produces a varying<br />
Microconidia borne on short,<br />
branched conidiophores, are<br />
The presence <strong>of</strong> chlamydospores,<br />
<strong>and</strong> microconidia borne on short,<br />
Booth, C. 1971 . The Genus<br />
Fusarium. CAB International,<br />
UK.<br />
Booth, C. 1977. Fusarium<br />
<strong>Laboratory</strong> <strong>Guide</strong> to the<br />
Identification <strong>of</strong> the Major<br />
Species. CMI , UK.<br />
amount <strong>of</strong> aerial mycelium, initially<br />
white, <strong>and</strong> changing to peach,<br />
salmon, wine grey to purple,<br />
violet.<br />
Mycelium becomes thickly matted<br />
<strong>and</strong> sometimes wrinkled in older<br />
colonies.<br />
generally abundant, hyaline,<br />
single-celled, variable, oval to<br />
kidney shaped, <strong>and</strong> measure 5-12<br />
x 2-4 ~m.<br />
Macroconidia, borne on more<br />
elaborately branched<br />
conidiophores, are infrequent in<br />
some strains.<br />
branched conidiophores are the<br />
most distinguishing features <strong>of</strong><br />
F oxysporum.<br />
The 3 septate macroconidia are<br />
most commonly found .<br />
The species may occasionally be<br />
confused with F moniliforme if<br />
CMI. 1970. Descriptions <strong>of</strong><br />
Pathogenic Fungi <strong>and</strong> Bacteria<br />
No. 211 . Fusarium oxysporum.<br />
CAB, UK.<br />
Spore masses are creamy white in<br />
colour.<br />
Macroconidia are hyaline, thinwailed,<br />
only slightly curved,<br />
pointed at both ends, 3-7 septate,<br />
with a somewhat hooked apex<br />
macroconidia <strong>and</strong><br />
chlamydospores are not readily<br />
evident. However, the presence <strong>of</strong><br />
variable microconidia should help<br />
to distinguish F oxysporum from<br />
Malone, J.P., <strong>and</strong> Muskett, A.E.<br />
<strong>and</strong> a foot-shaped basal cell; <strong>and</strong><br />
F moniliforme.<br />
1964. <strong>Seed</strong>-borne fungi <br />
description <strong>of</strong> 77 fungus<br />
species. Proc. Int. <strong>Seed</strong> Test.<br />
Assoc. 29 (2) : 179-384.<br />
measure 27-66 x 3-5 ~m .<br />
Chlamydospores are spherical,<br />
smooth or rough-walled, usually<br />
formed singly but occasionally in<br />
Note: F oxysporum is one <strong>of</strong> the<br />
most variable Fusarium<br />
species.<br />
Nelson, P.E., Toussoun, T.A., <strong>and</strong><br />
Marasas, w.F.O. 1983.<br />
Fusarium Species - An<br />
pairs or in chains, at intervals<br />
along hyphae, or on short lateral<br />
branches.<br />
I/Iustrated Manual for<br />
Identification. The Pennsylvania<br />
Perithecial state is not confirmed.<br />
State University Press, USA <strong>and</strong><br />
London.<br />
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