Lime is an effective agent for sterilization and isolation of silkworms, their environment, and surrounding areas. However, improper use of lime can lead to failure in achieving the desired disinfection and disease prevention effects. Here are some important points to consider when using lime:
First, it is crucial to use fresh lime powder or freshly prepared lime slurry, as these have strong disinfectant properties. Once lime has been exposed to air for a long time, it reacts with carbon dioxide and forms calcium carbonate, which loses its disinfecting ability. Therefore, when using lime for disinfection, it’s best to use it immediately after preparation. If you need to store it for later use, make sure to seal it tightly in a plastic bag to prevent moisture and air exposure. While it may still be usable next time, avoid keeping it for too long—ideally no more than a few days.
Second, after lime blocks are ground into powder, they should be sifted to remove any small lumps. These lumps can potentially burn the skin or feet of silkworms, causing harm and reducing their health.
Third, when combining lime powder with bleach or chlorine-based anti-static powders, it is essential to follow the correct mixing ratio and timing. Improper mixing or an overly concentrated solution can cause serious damage to the silkworms. Always mix thoroughly and adhere strictly to recommended proportions.
Fourth, lime powder should not be used together with other disease-prevention agents, such as silkworm nets or anti-stall powders, as this may reduce its effectiveness.
Fifth, avoid applying lime powder when feeding silkworms with wet leaves, especially on rainy days. Lime can stick to the mulberry leaves, making them less palatable and affecting the silkworms’ feeding behavior.
Lastly, when using lime powder for sterilization, it should be evenly spread over the silkworms in a thin layer. This ensures maximum effectiveness without causing harm. When using lime powder as a substitute for eschar (a traditional dust used in mulberry cultivation), care must be taken to avoid uneven or excessive application, as this could lead to non-silkworms or other unwanted issues.
By following these guidelines, you can ensure that lime is used safely and effectively in silkworm rearing, promoting better hygiene and healthier silkworms.
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