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Chlorpyrifos is normally supplied as a 23.5% or 50% liquid concentrate. The recommended concentration for direct-spray pin point application is 0.5% and for wide area application a 0.03–0.12% mix is recommended (US).
Amitraz (development code BTS27419) is a non-systemic acaricide and insecticide [1] and has also been described as a scabicide. It was first synthesized by the Boots Co. in England in 1969. [2] Amitraz has been found to have an insect repellent effect, works as an insecticide and also as a pesticide synergist. [3]
Imidacloprid is a systemic insecticide, belonging to the class of chloronicotinyl neonicotinoid insecticides. It works by interfering with the transmission of nerve impulses in insects by binding irreversibly to specific insect nicotinic acetylcholine receptors. [28] It is in IRAC group 4A.
Fipronil is a broad-spectrum insecticide that belongs to the phenylpyrazole insecticide class. [3] Fipronil disrupts the insect central nervous system by blocking the ligand-gated ion channel of the GABA A receptor (IRAC group 2B) and glutamate-gated chloride (GluCl) channels. This causes hyperexcitation of contaminated insects' nerves and muscles.
Carbaryl is often inexpensively produced by direct reaction of methyl isocyanate with 1-naphthol. [5]C 10 H 7 OH + CH 3 NCO → C 10 H 7 OC(O)NHCH 3. Alternatively, 1-naphthol can be treated with excess phosgene to produce 1-naphthyl chloroformate, which is then converted to carbaryl by reaction with methylamine. [5]
Creolin is also used as a home remedy for lice treatment. Recipes using drops of the concentrated disinfect with "20-26%" toxic phenols mixed with shampoo or mixed with the lather of bar soap can be found online. There is no scientific evidence that Creolin promotes hair growth. [19] [20]
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