Trichoderma is a kind of competitive sundry fungus which is common and destructive during the production process of fungus sacks. Trichoderma covers many varieties, the common two or three refer to Trichoderoma viride, T.konigii, T.polysporum, T.longibrachiatum, T.hazianum and so on. After getting infected by Trichoderma, mycelia stop growing, which results in scrapped fungus sacks.
1. Occurrence conditions: High temperature, high humidity, poor ventilation and acidic compost.
2. Control methods:
A. Raw materials should be fresh, dry and thoroughly sterilized under 100 degrees for 10 hours so as to drastically kill off the spores of Trichoderma.
B. During the cultivation period of strain, enhance the ventilation, lower the temperature and humidity, control the relative air humidity in under 80% and avoid high-temperature or high-humidity condition.
C. When you observe any Trichoderma in strain, dig it out of compost in time, combine with a small number of fresh compost and 1000-1500 times of pesticide, then conduct the bagging and sterilization.
D. Before you utilize the fruiting place, firstly spray 0.1% of Kemeiling (A kind of pesticide) while strengthening the ventilation so as the retain certain fresh air.