10- 15 days. Chrysanthemum oleoresin refers to a kind of pesticide that can effectively kill mosquitoes and flies, and has low toxicity and low residue. After being used by male Cai, some substances will remain in southern vegetable, which is slightly toxic and needs to be decomposed and absorbed within 10- 15 days, and can only be fed to pigs after being completely absorbed or removed. Feeding pigs with chrysanthemum fat in a short time will lead to food poisoning and affect the health of pigs.