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Abstract
Cordyceps militaris is an entomopathogenic fungus with many medicinal values and has been used in traditional medicines for a long time. Substrate is one of the important factors for the production of fruiting bodies of ĐTHT. The experiment was a completely randomized design experiment (CRD) included 5 treatments on 5 substrates, with 20 replications. The treatments included (1) Huyet rong rice (100%); (2) Tim than rice (100%); (3) Rice (100%); (4) Huyet rong (50%) + Rice (50%) and (5) Tim than rice (50%) + Rice (50%). The results showed that the Cordyceps militaris produced on condition of media containing the mixturure of Tim than rice and Rice were infection rate of Cordyceps militaris (95,9%); suitable for fruiting body formation with earliest appearance of fruit bodies (14,4 days); the length of fruit bodies (42,5 mm), the rate of length fruit bodies at 30 - 45 days after inoculation (11,0 cm/day), the rate of diameter fruit bodies at 45 - 60 days after inoculation (1,5 mm/day), the mean weight of total number of mushroom fruiting bodies per 100 g substrate fresh and the biologicial efficacy (28,6%). This technique can be applied to produce Cordyceps militaris mushroom on rice substrate to meet the market demand in current Cordyceps products.