The Story of Peony in Luoyang mentioned the method of peony pest control: "When planting flowers, you must choose fertile fields, get rid of the old soil and use the fine soil at the end of one catty of ampelopsis. The root of peony is sweet, which attracts more insects. Snake grapes can kill insects. This kind of flower is also a method. "
It is also pointed out that if the flowers become smaller, it means that there are moths, and you should look for small holes in the branches. When the worm dies, the flowers bloom. "It can be seen that there are very few kinds of drugs used to treat insects in the Song Dynasty, such as snake grapes and sulfur.
In the Ming and Qing Dynasties, the types of drugs increased greatly. The botanical drugs mentioned in "Flower Mirror" in Qing Dynasty are garlic, Daphne genkwa and Stemona, and the inorganic drugs are mirabilite, sulfur and realgar. In addition, there are physical methods such as fumigation and Gracilaria armyworm.
Luoyang peony