A Destructive Mycoparasite, Gliocladium Roseum

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Abstract
G. roseum was shown to be a destructive parasite on numerous other fungi. No fungus tested was immune to attack at all stages of development. In the present preliminary study the destructive activities of this parasite were compared on 5 host fungi. Killing of spores and vegetative cells occurred only following contact by the parasite, indicating the absence of an antibiotic substance capable of acting at a distance. Penetration of the host cells by G. roseum, if it occurred at all, followed death of the cells. Ceratocystis fimbriata was very susceptible and was completely killed in mixed culture with G. roseum. On the other hand, Helminthosporium sativum was highly resistant and only immature conidiophores and conidia were damaged.