Selective toxicity of halofenozide to exotic white grubs (Coleoptera: Scarabaeidae)

摘要: Field populations of Japanese beetle, Popillia japonica Newman; European chafer, Rhizotrogus ( Amphimallon ) majalis (Razoumowsky); oriental Exomala orientalis (Waterhouse); and Asiatic garden Maladera castanea (Arrow), were exposed to the ecdysone agonist halofenozide in turf plots. In mixed-species larval populations, a higher dosage (1.7–2.2 kg [AI]/ha) was required give significant suppression chafer than control beetles (1.1 [AI]/ha). other experiments, (1.1–1.7 reduced beetle by 75–98%. These data confirm predictions selectivity based on previous laboratory studies. survival field 40–50% plots treated with untreated Dosage effects compared for 3rd instars laboratory; insensitive at all tested dosages. may increase relative importance where is used against mixed exotic scarabs.