Objective:To provide scientific basis for utilizing extracts of medicinal plants to kill Luperomorpha xanthodera (Fairmaire) on Atractylodes macrocephala Koidz. plants by determining the toxic effect on Luperomorpha xanthodera (Fairmaire) by macleaya cordata plant. Methods: To use literature method to extract alkaloids from fruits of macleaya cordata,and then spray different contents of the extract alkaloids on Luperomorpha xanthodera (Fairmaire). Results: Within 48 hours, the effect of LD50 on Luperomorpha...