Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Crassula helmsii: Use hot water to control plants We found no evidence on the use of hot water to control Crassula helmsii. '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. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1275https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1275Thu, 30 Jun 2016 08:21:56 +0100Collected Evidence: Collected Evidence: Crassula helmsii: Biological control using fungal-based herbicides We found no evidence for the effects of biological control using specific, non-selective or native herbivores on Crassula helmsii. '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. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1276https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1276Thu, 30 Jun 2016 13:52:42 +0100Collected Evidence: Collected Evidence: Crassula helmsii: Biological control using herbivores We found no evidence for the effects of biological control using specific, non-selective or native herbivores on Crassula helmsii. '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. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1277https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1277Tue, 05 Jul 2016 16:21:33 +0100Collected Evidence: Collected Evidence: Crassula helmsii: Physical control using manual/mechanical control or dredging We found no evidence for the effects of physical control, using manual or mechanical control or dredging, on Crassula helmsii. '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. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1278https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1278Tue, 05 Jul 2016 16:27:37 +0100Collected Evidence: Collected Evidence: Crassula helmsii: Chemical control using herbicides Seven studies (including one replicated and controlled study) in the UK, found that applying glyphosate reduced Crassula helmsii. In one before-and-after study at a single site glyphosate applied in combination with diquat reduced C. helmsii by 98%. Another before-and-after study at a single site found that covering C. helmsii with carpet before treating with glyphosate resulted in an 80% reduction in the plant. Three out of four studies (including one controlled study) in the UK found that applying diquat or diquat alginate reduced cover or eradicated submerged C. helmsii. One before-and-after study at a single site found that applying both diquat and glyphosate reduced C. helmsii by 98%. One small, before-and-after trial found no effect of diquat or diquat alginate on cover of C. helmsii. One out of two studies (including one replicated, controlled study) in the UK, found that treating submerged C. helmsii with dichlobenil in container trials led to partial reduction in its biomass. One small before-and-after field study found no effect of dichlobenil on C. helmsii. One replicated, controlled container trial in the UK found that treatment with terbutryne partially reduced biomass of submerged C. helmsii. The same study found reductions in emergent C. helmsii following treatment with asulam, 2,4-D amine and dalapon. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1279https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F1279Tue, 05 Jul 2016 16:29:26 +0100