P. auriculasis is a non-infectious physiological disorder that commonly occurs in mushroom cultivation. This condition typically appears when the mycelium transitions from its growth phase to the fruiting body formation stage. One of the most noticeable symptoms is the appearance of clusters of buds, where only long stalks develop without forming caps. As the stipes elongate, small points appear at the top, and after some time, branches and smaller branches begin to grow. These smaller branches become progressively finer and droop downward, creating a shrub-like structure. This is quite different from the normal upward growth of fruiting bodies, which usually results in well-formed caps.
The primary cause of this condition is high levels of carbon dioxide (CO₂) and excessive humidity. When the mycelium reaches the stage of fruiting body development, it's important to ensure proper ventilation and light exposure. If the environment becomes too stagnant—especially with high CO₂ levels and insufficient oxygen—it can lead to abnormal growth. The lack of adequate light stimulation combined with high humidity further contributes to the issue, causing the fruiting bodies to develop only as long stalks without caps, and eventually producing additional branches at the tip.
To control P. auriculasis, it's essential to maintain good air circulation and provide appropriate lighting once the primordia have formed. Controlling humidity and reducing the temperature in the growing area can also help create a more favorable environment for normal fruiting body development. If abnormal growth is observed—such as the stipe splitting into multiple branches and drooping—it should be removed immediately. Adjusting the environmental conditions can often restore normal growth, allowing the mushrooms to develop properly. Regular monitoring and timely intervention are key to preventing and managing this disorder effectively.
Vtm Sampling Tube With Swab
[Sample requirements]
The collected nasopharyngeal swab samples should be transported at 2°C to 8°C and sent for inspection immediately, and the sample delivery and storage time should not exceed 48 hours.
[Testing method]
1. Before sampling, mark the relevant sample information on the label of the sampling tube.
2. According to different sampling requirements, use a sampling swab to sample in the nasopharynx.
3. The specific sampling methods are as follows:
a) Nasal swab: Gently insert the swab head into the nasal palate, stay for a while and then slowly turn to exit. Wipe the other nostril with another swab, immerse the swab head in the sampling solution, and discard the tail.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with a swab, also immerse the swab head in the sampling solution, and discard the tail.
4. Quickly put the swab into the sampling tube.
5. Break the part of the sampling swab higher than the sampling tube, and tighten the tube cover.
6. Freshly collected clinical specimens should be transported to the laboratory within 48 hours at 2°C to 8°C.
[Explanation of test results]
After the sample is collected, the sampling solution turns slightly yellow, which will not affect the nucleic acid test result.
[Limitations of the test method]
1. For samples that are seriously contaminated due to improper storage after collection, the final test results will be affected.
2. If the sample is not stored at the specified temperature, the final test result will be affected.
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