Abstract: The present invention is intended to efficiently produce a large amount of chlamydospores of Trichoderma harzianum SK-5-5 mycelia. This objective is achieved by chlamydospores characterized by having been obtained by inoculating a culture medium containing glucose, yeast extract and polypepton with Trichoderma harzianum SK-5-5 mycelia and culturing the same to thereby obtain chlamydospores containing conidiospores.

Abstract: A plant is activated and the activity is promoted by using a product of Trichoderma harzianum SK-5-5 strain. The activation of a plant and the promotion of the activity can be achieved by culturing Trichoderma harzianum SK-5-5 strain in a solid medium and extracting its product, or by applying the conidiospores of the above strain.

Abstract: The fungus Trichoderma harzianum SK-55 provides broad antagonistic interaction against plant pathogenic diseases, and may be used to control fungal diseases in plants. A fungicidal composition contains Trichoderma harzianum SK-55 isolated from the soil. A method of manufacturing a fungicidal composition comprises introducing a large quantity of Trichoderma harzianum SK-55 into a culture medium, incubating it on the culture medium at a specific temperature range and at a specific humidity for a specific period of time, drying it at a specific low temperature range, and, if necessary, milling it into specific grain sizes. The fungicidal composition containing the incubated fungus may be distributed at the rate of 0.5 g to 5 g/m.sup.2.