Why ladybugs?

Among the 24 solar terms of ladybugs, the sting and Dragon Boat Festival will remind people to kill insects.

It is not only a traditional custom, but also has its scientific significance to use lime, sulfur or wormwood to repel insects before and after stinging. Because mosquitoes are eggs, it is easier to drive them away completely, and it is more difficult to kill them after hatching.

"Southern Vegetation" recorded the method of using yellow ants to control citrus scale insects, which was the earliest method of using insects to control insects discovered by China ancestors. It was mentioned that at that time, people could be seen selling yellow ants in the market, and farmers who planted oranges would also buy them. Artemisia argyi, Acorus calamus, realgar, mint, pyrethrum and camphor are all traditional anthelmintics. Putting cultural relics in camphor wood boxes is also a natural way to repel insects.