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Biological Characteristics, Host Adaptation and Growth Cycle of Cordyceps Militaris
2026-09-18
1. Morphological Characteristics
Cordyceps militaris consists of two main growth forms: mycelium and fruiting body.
1.1 Mycelium
Its asexual strain is Paecilomyces militaris. The mycelium is white, dense and robust, growing closely on the medium surface. In the later stage, it produces yellow pigment and turns orange-yellow under light. Microscopically, the mycelium is septate and transparent. Spherical or elliptical conidia grow in chains on the top of mycelia, which supports fungal reproduction and proliferation.
1.2 Fruiting Body
After absorbing nutrients from insect pupae or artificial culture medium, the mycelium transforms from vegetative growth to reproductive growth and forms upright, club-shaped fruiting bodies in orange-yellow or orange-red color.
The fruiting body is composed of a smooth stipe and a fertile upper part with burr-like perithecia. Each perithecium contains multiple asci with linear spores. Mature spores can break up to form secondary spores for further propagation.
Wild fruiting bodies are 3–16 cm long and 0.2–0.6 cm thick, crisp in texture and easy to break. The stipe is smooth and light yellow, while the upper fertile part presents bright orange-red color.
2. Host Range
Cordyceps militaris is a facultative parasitic fungus with strong adaptability. Unlike ordinary cordyceps with single-host limitation, it can parasitize nearly 200 kinds of insects, including Lepidoptera, Coleoptera, Homoptera and Diptera. It mainly reproduces on lepidopteran pupae, with a wide host range and high survival adaptability.
3. Ecological Distribution
Cordyceps militaris is a globally distributed fungus. It is widely found in China, Japan, India, Russia, Britain, France, Germany, the United States, Canada and other countries.
In China, wild resources are mainly concentrated in Northeast, North and Northwest regions. It usually grows in coniferous and broad-leaved mixed forests at altitudes of 100–2500 m. The suitable growth environment includes temperature of 15–25℃, air humidity of 60%–85%, slightly acidic soil with 20%–25% water content, and the fruiting bodies mature from June to September every year.
4. Life Cycle
Cordyceps militaris has two growth stages: asexual stage (mycelium and conidia growth) and sexual stage (fruiting body and ascospore formation).
In natural environment, mature spores spread with wind, germinate into mycelia after attaching to suitable insect hosts, and absorb nutrients by decomposing insect tissues. Finally, the mycelia differentiate and develop into mature orange-red fruiting bodies to complete the whole growth cycle.
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