The invention relates to a
microemulsion type suckercide as well as a preparation method and application thereof, the
microemulsion type suckercide comprises the following components in percentage by weight: 30% of mixed ester
alcohol component, 10% of absolute ethyl
alcohol, 5% of n-butyl
alcohol, 25% of emulsifier and 30% of water; the mixed ester alcohol component comprises 36 to 54.6 percent of n-caprylic alcohol, 45 to 63.9 percent of n-decanol and 0.1 to 0.4 percent of
dodecanol, and the emulsifier is preferably polyoxyethylene 40 hydrogenated
castor oil. The
microemulsion type suckercide can be applied as a tobacco suckercide, when the suckercide is applied to tobacco suckercide, the
dilution multiple is 8 times, the application method is cup spraying suckercide, and the dosage of the diluted suckercide per
plant is 25 mL. The microemulsion type suckercide is green in formula, has an efficient suckercide effect on tobacco, is long in lasting period, does not contain components such as
pendimethalin, butralin and
flumetralin, and avoids the problem that chemical
pesticide residues in tobacco leaves exceed the standard after an existing chemical suckercide is applied.