Screening method of pesticide for preventing and treating citrus liberobacter asiaticum

The invention relates to the field of agriculture and forestry science, in particular to a method for screening a pesticide for preventing and treating citrus liberobacter asiaticum, which comprises the following steps of: applying the screened pesticide to the root of a water solution containing a nutrient solution by utilizing citrus seedlings infected with the liberobacter asiaticum and cultivated in the water solution containing the nutrient solution, culturing for at least 20 days, and detecting the concentration of the pesticide remained in the citrus seedlings. And the pesticide effect is evaluated by detecting the number of germs of the citrus liberobacter asiaticum through PCR (Polymerase Chain Reaction). The invention provides a hydroponic method for screening the pesticide for preventing and treating the citrus liberobacter asiaticum, the method is simple, convenient, rapid and effective, and the effective pesticide can be screened within 20-40 days.