Cause Analysis and Preventive measures of abnormal Edible Fungi

1. Mycelium yellowing and atrophy: 15 days after inoculation, the hyphae gradually yellowed, sparse and shrunk, and could not continue to grow in the material.

The main results are as follows: 1. The cause of occurrence: the temperature in the ① culture room is high, the ventilation is not good, the discharge between the bag and the bag is too tight, the air circulation is affected, the material temperature is difficult to spread out, and the hyphae are damaged by high temperature. The ② material is too wet and pressed too hard, the air permeability is not good, and the mycelium is anoxic. ③ sterilization is not complete, thermophilic bacteria multiply in large numbers, compete for nutrition and inhibit mycelium growth. The ventilation of ④ culture room is poor and the concentration of carbon dioxide is high.

2. Preventive measures: it is better to keep the temperature of ① culture room about 20 ℃. There should be a slight distance between the bag and the bag to facilitate the material temperature to diverge. In hot weather, do a good job of ventilation and cooling. ② has a good grasp of the ratio of feed to water. The bag is loose and tight and suitable. When the material is too wet, the bag can be moved to a strong ventilated place, and the bacterial bag with mycelium over the shoulder can be loosened. To ventilate and reduce dampness. The ③ medium was sterilized under normal pressure and kept at 100℃ for 10 hours to prevent bacterial contamination.

Second, the mycelium grows slowly in the later stage of the bacteria, and the bag is slow to fill.

The main results are as follows: 1. The cause of occurrence: the ① bag is airtight and the mycelium is anoxic, which is commonly seen in the closed hair culture at both ends. When the temperature of ② is low, the mycelium grows slowly or stops growing.

2. Preventive measures: when ① adopts closed hair culture, when the mycelium is 3-5cm long, untie the tie rope at both ends of the bag, loosen the mouth of the bag and breathe into the air, or use piercing ventilation to replenish oxygen. ② was cultured at a suitable temperature, and the indoor temperature was not lower than 18 ℃.

Third, mushroom will be produced before the mycelium is full.

1. The cause: the temperature of mycelium culture is too low, and the temperature is suitable for mushroom production.

2. Preventive measures: timely cultivation, low temperature cultivation, the hyphae should be heated to maintain the temperature above 18 ℃.

3. Prevention and control methods: ① timely germ, shorten germ time, reduce material surface water evaporation; ② timely open bag mouth; ③ found that material surface water loss, timely replenishment of water.