The invention discloses a preparation method of a mosquito repellent
liquid based on eight traditional Chinese medicines. The preparation method comprises the following steps: (1) eight traditional Chinese medicines including folium artemisiae argyi, wrinkled gianthyssop
herb,
pericarpium citri reticulatae,
flos caryophylli, radix angelicae dahuricae,
drug sweetflag
rhizome,
flos lonicerae and herba menthae are ground into
powder in the ratio being 1:1:1:1:1:1:1:1, the
powder is added to a casserole,
purified water is added in the ratio of the
powder to the
purified water being 1:20 for decoction, the solution is concentrated to 1 / 20 and filtered, and a filtrate is used for standby application; (2) white flowers of
pyrethrum are dried and ground into powder,
purified water is added in the ratio of the powder to the purified water being 1:20 for uniform stirring, the solution is added to the casserole for decoction, concentrated to 1 / 20 and filtered, and a filtrate is used for standby application; (3) concentrated filtrates of the eight traditional Chinese medicines and the
pyrethrum are mixed in the ratio being 4:1, and the mixture is transferred into a sterilization room for sterilization; (4) after inspection qualification, the filtrates are bottled with 20 g for each
bottle. The mosquito repellent liquid prepared from the eight traditional Chinese medicines with insecticidal
efficacy has better effect than the common single
pyrethrum product and cannot produce any harm to
human health, and the preparation method is simpler and suitable for being widely popularized and applied.