Abstract
Two types of germination were exhibited by Colletotrichum coccodes when sclerotia, placed on moist filter papers in petri plates that were then either not sealed or sealed with Parafilm, were incubated for 5 days at temperatures of 10 to 34°C under a 14-h photoperiod. In sealed plates, germination was primarily myceliogenic; in nonsealed plates, sclerotial germination was only sporogenic. Setose, slightly orange-colored conidial masses were profusely produced on sclerotia at all temperatures greater than 10°C. Hyaline masses of conidia with sparse setae were produced on sclerotia maintained in complete darkness, and no mycelia formed in the sealed plates. In all temperature treatments, the numbers of colony-forming units per 100 sclerotia were greater in nonsealed than in sealed plates and greater under light than in complete darkness.
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