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Green Molds, Trichoderma
4 species
A large genus (Hypocreaceae, Hypocreales) of fast-growing soil and wood fungi, many of them mycoparasites, with white mycelium that turns green as conidia form. Several species are active ingredients in biopesticides and biostimulants. Others cause green mould disease, the most common and hardest-to-contain competitor in mushroom cultivation: T. aggressivum on button mushroom compost, T. pleuroti and T. pleuroticola on oyster mushroom substrate, and the T. harzianum complex on shiitake.
Mycelium: white, cottony to dense, quickly turning yellow-green to dark green as conidia form; often grows in rings or patches. Conidiophores: branched, with phialides in clusters (pachybasium-like in the Harzianum clade; gliocladium-like in T. pleuroti). Conidia: small, green, abundant, dry. Growth: very rapid. Sexual morphs (formerly Hypocrea) are perithecial stromata, rarely seen in cultivation.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
