Abstract: To assess the potential risk to non-target plants of exotic Ophraella communa as a potential biological control agent of the target weed,an alien invasive weed Ambrosia artemisiifolia L.,host-selection behaviors of ovipositing females and neonate larvae were observed on non-target plants in the tribe of composite,Heliantheae,A.trifida,Xanthium sibiricum,two varieties of Helianthus annuus,H.multiflorus, and H.tuberosus.Pre-oviposition and pre-feeding durations were analyzed using the survival analysis(failure-time analysis)method in host-specificity testing of weed biological control agent.The resuhs showed that A.trifida and X.sibiricum were equally susceptible to oviposition compared to the target weed.Pre-feeding duration was not different between the common sunflower H.annuus and the target weed A.artemisiifolia. Finally,the potential risks of O.communa to non-target plants in areas where it is used as a biological control agent of the alien invasive weed Ambrosia artemisiifolia wasdiscussed.