Abstract
Japanese raspberry (Rubus parvifolius L.) is native to eastern Asia and Australia and has naturalized in several locations in Illinois, Iowa, Massachusetts, Missouri, and Ohio. This species was introduced in North America for food and erosion control, but it appears to be becoming a serious invasive species threat in savannas and prairies. It was found in a former commercial game-hunting farm on Walnut Creek National Wildlife Refuge (now Neal Smith National Wildlife Refuge) in 1991, and was identified as Japanese raspberry in 1995. Japanese raspberry grows vigorously and spreads via rooting from low-arching-to-prostrate canes that are up to 300 cm long, and its seeds can be dispersed by birds. In summer, primocanes are green to purplish green, though they turn reddish brown in winter. It has small pink flowers and bright red fruits. It thrives in shade in a remnant savanna on the refuge, forming rapidly expanding near-monoculture populations. Efforts to control it with herbicide treatment since its discovery have been unsuccessful, but also somewhat sporadic. A second population in a roadside within a mile of the refuge demonstrates its ability to thrive in full sun. County dredging of ditches for drainage improvement may be serving as a vector for its expansion.
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Claims 6
Claim · model-written summary
Japanese raspberry has naturalized in five named US states.
- Taxon
- Japanese raspberry (Rubus parvifolius L.)
Rubus parvifoliuse0 - Outcome
- has naturalizede0
- Setting
- Illinois, Iowa, Massachusetts, Missouri, and Ohioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Japanese raspberry (Rubus parvifolius L.) is native to eastern Asia and Australia and has naturalized in several locations in Illinois, Iowa, Massachusetts, Missouri, and Ohio.”
Claim · model-written summary
Japanese raspberry spreads by rooting low arching to prostrate canes.
Verbatim
e0“Japanese raspberry grows vigorously and spreads via rooting from low-arching-to-prostrate canes that are up to 300 cm long”
Claim · model-written summary
Birds can disperse Japanese raspberry seeds.
Verbatim
e0“its seeds can be dispersed by birds.”
Claim · model-written summary
Japanese raspberry thrives in shaded remnant savanna and forms expanding near monocultures.
Verbatim
e0“It thrives in shade in a remnant savanna on the refuge, forming rapidly expanding near-monoculture populations.”
Claim · model-written summary
Sporadic herbicide efforts have not controlled Japanese raspberry.
- Taxon
- ite0
- Treatment
- herbicide treatmente0
- Outcome
- control ite0
- Direction
- unsuccessfule0
- Qualifier
- somewhat sporadice0
Not reportedComparator
Verbatim
e0“Efforts to control it with herbicide treatment since its discovery have been unsuccessful, but also somewhat sporadic.”
Claim · model-written summary
A second population thrives in full sun near the refuge.
Verbatim
e0“A second population in a roadside within a mile of the refuge demonstrates its ability to thrive in full sun.”