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United States Department of Agriculture

Agricultural Research Service


item Samuels, Gary
item Petrini, Orlando
item Kuhls, Katrin
item Lieckfeldt, Elke
item Kubicek, Christian

Submitted to: Studies in Mycology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/15/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: Diseases caused by fungi result in millions of dollars damage to agricultural crops and crop products each year. Many of these fungal diseases can be controlled using environmentally friendly means. Members of the fungal genus Trichoderma are useful as agents of biological control for many of these diseases. An accurate classification of these fungi is needed in order to locate and identify strains that will be useful in biological control. This monograph provides an account of all the species of Hypocrea and the asexual state in Trichoderma that are related to H. schweinitzii. For each of the ten species a detailed description is provided along with drawings and photographs of the micromorphological structures. In addition keys for identification are provided to both the sexual and asexual states of these fungi. Based on the results of this paper, those seeking improved methods of biological control will be able to oidentify the fungi that serve as effective agents for the biological control of diseases.

Technical Abstract: Hypocrea schweinitzii and related sexual and asexual Hypocrea species form a monophyletic clade known as the H. schweinitzii complex. The anamorphs of all of the Hypocrea species correspond to Trichoderma sects. Longibrachiatum and Saturnisporum. The H. schweinitzii complex includes ten species, including six holomorphic (Hypocrea) and four anamorphic (Trichoderma) species. The following new species are proposed: Hypocrea andinensis, H. longibrachiata, H. novaezelandiae, H. pseudokoningii, T. konilangbra. Trichoderma parceramosum is found to be a later synonym of T. ghanense. The anamorph of H. pseudokoningii is T. pseudokoningii; the anamorph of H. schweinitzii is T. citrinoviride. The anamorph of H. jecorina is T. reesei. No teleomorph is known for the following species T. ghanense, T. konilangbra, and T. saturnisporum. A key to the species of Hypocrea and Trichoderma, and descriptions and illustrations are provided.

Last Modified: 10/17/2017
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