Biological source tobacco suckercide as well as preparation method and application thereof

The invention discloses a biological source tobacco suckercide as well as a preparation method and application thereof. The preparation method of the suckercide comprises the following steps: preparing the main alcohol and the auxiliary alcohol from the waste oil; heating the main alcohol to 30-40 DEG C, and uniformly stirring; then adding auxiliary alcohol, heating to 40-60 DEG C, and uniformly stirring; and finally, adding the surfactant, and uniformly stirring to obtain the suckercide. Wherein the main alcohol comprises two fatty alcohols, namely n-caprylic alcohol and n-decanol; and the auxiliary alcohols are at least three fatty alcohols of dodecanol, tetradecanol, hexadecanol and octadecanol. The suckercide is a mixture of several natural fatty alcohols, is optimized and compounded, and is reasonable in formula; the preparation process is simple and convenient for industrial production; the raw materials are natural and have very good degradability, residues have no harm to the environment, and the suck