Causes of abnormal growth of volvariella volvacea and preventive measures

Straw mushroom is one of the common edible fungi, its cultivation technology is simple and low cost, but the income is considerable, so there are more people to cultivate it. However, after sowing, there are often some abnormal growth, affecting its yield and quality, the following with the editor to take a look at the causes of abnormal growth of straw mushroom and preventive measures.

1. Mycelium atrophy

In general, volvariella volvacea began to germinate after sowing for 12 hours and grew continuously to the culture material, but 24 hours after sowing, the hyphae did not germinate or grow, which may have occurred the phenomenon of mycelium shrinkage.

Reasons for shrinkage: there are many reasons for mycelium shrinkage, such as burning bacteria at high temperature, when the temperature of the culture material exceeds 45 degrees for a long time, it will lead to mycelium atrophy; volvariella volvacea is more sensitive to pesticides, and pesticides will be sprayed to prevent diseases and insect pests after sowing, which will also lead to mycelium shrinkage; when the water content of the culture material exceeds 70% or the coverage is too strict, the hyphae will suffocate and atrophy due to lack of oxygen. Excessive addition of urea or chemical fertilizer in the culture material will emit a large amount of ammonia, resulting in mycelium atrophy; the bacterial age of the strain is too long or too short, the vitality is weak, and it is easy to shrink; straw mushroom is more sensitive to temperature. generally, when the temperature difference between day and night is large, the mycelium will shrink; in addition, when there are pests in the culture material, the mycelium will be eaten, resulting in mycelium atrophy.

Preventive measures: for the phenomenon of burning bacteria at high temperature, it is necessary to build a sunshade to avoid burning bacteria at noon, when stacking the culture material, the temperature reaches 75 degrees, it is necessary to turn the pile twice; it is not appropriate to spray pesticides into the culture material after sowing; the moisture content of the culture material should not exceed 70%, the covering film should not be too strict, and there should be some gaps to facilitate ventilation. The addition amount of urea should not exceed 0.2%, and should be added when stacking materials; high-quality bacteria should be selected during cultivation, and the suitable bacteria age should be 15-20 days, and those with a suitable age of more than 30 days should not be used; it is necessary to do a good job in the hygiene of mushroom houses, stay away from livestock and poultry sheds, and thoroughly disinfect them and put an end to insect sources.

Second, the mycelium grows excessively

After sending bacteria, there will be a large number of white villous hyphae in the material surface, that is, the hyphae grow too long, and the hyphae can not be transferred to reproductive growth in time, resulting in delayed budding, less mushroom production and low yield.

The reason for excessive growth: generally, poor ventilation leads to high temperature, high humidity and high concentration of carbon dioxide, thus stimulating the hyphae and causing excessive growth.

Preventive measures: after 2-3 days of mycelium growth, the film should be opened regularly according to its growth status, so as to facilitate ventilation, reduce temperature, humidity and carbon dioxide concentration, and make the mycelium grow normally.

The above are the causes of abnormal growth of volvariella volvacea and preventive measures, hope to help you, want to know more related knowledge, please pay attention to us.