Lime is commonly used for sterilization and isolation in silkworm rearing, as it helps maintain a clean environment and prevent diseases. However, improper use of lime can reduce its effectiveness. Here are some important points to consider when using lime:
First, always use fresh lime powder or freshly prepared lime slurry, as they have strong disinfecting properties. Lime that has been left exposed to air for too long reacts with carbon dioxide and turns into calcium carbonate, which loses its disinfectant effect. Therefore, it's best to use lime immediately after preparation. If you don't use it all at once, store it in an airtight plastic bag to keep it dry and effective for future use. However, avoid keeping it for too long, as its potency will gradually decrease over time.
Second, after preparing lime powder from lime blocks, make sure to sieve it thoroughly to remove any small lumps. These lumps can cause burns on the silkworms' skin and feet, leading to injuries and potential infections.
Third, when combining lime powder with bleach or chlorine-based anti-static powders, it's crucial to follow the correct mixing ratio and timing. Improper mixing or an overly high concentration of available chlorine can be harmful to the silkworms, causing damage or even death. Always mix the ingredients thoroughly and adhere strictly to the recommended proportions.
Fourth, avoid mixing lime powder with other disease-prevention agents, such as silkworm nets or anti-stall powders. Combining them may reduce the overall effectiveness of both substances.
Fifth, do not apply lime powder when feeding silkworms with wet leaves, especially on rainy days. The moisture can cause the lime powder to stick to the mulberry leaves, reducing the silkworms’ ability to consume them properly.
Lastly, when applying lime powder for sterilization, spread it evenly over the silkworms in a thin layer. This ensures maximum coverage without overuse. When using lime powder as a substitute for ash (eschar) in mulberry leaf treatment, be careful not to apply it unevenly or in excess, as this could lead to issues like non-silkworms or poor growth.
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