Question: What is the best least toxic way to get rid of Oriental Bittersweet without using Roundup? Answer: Jonathan Foster, Special Project Assistant  I’m sorry to hear you’re dealing with oriental bittersweet (Celastrus orbiculatus), as it can be quite a chore to remove. The Penn State Univ Extension has an excellent page on the plant, including read more What is the best least toxic way to get rid of Oriental Bittersweet?