Providing evidence to improve practice

Action: Crassula helmsii: Surround with wire mesh Control of Freshwater Invasive Species

Key messages

  • We found no evidence that surrounding Crassula helmsii with wire mesh reduced its rate of spread.

'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.



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