Skunk cabbage: Chemical control using herbicides
Overall effectiveness category Likely to be beneficial
Number of studies: 2
Background information and definitions
Application of chemical herbicides may offer a tool for management of skunk cabbage Lysichiton americanus provided regulatory approvals are in place.
Supporting evidence from individual studies
A study in 2010, at Lymington Reedbeds, England, UK (Chatters 2010) found that herbicide sprays, glyphosate and 2, 4-D Amine, each killed skunk cabbage Lysichiton americanus. Two months following treatment, most plants sprayed with glyphosate appeared to have been killed, whereas most of those sprayed with 2,4-D amine were found to have new shoots. However, six months following the treatments, a limited survey did not find any skunk cabbage plants, suggesting that both herbicide applications may have been successful. The site was divided into two sections. A larger downstream section was treated with glyphosate (Roundup Pro Biactive) at a rate of 6 litres/ha. A smaller, upstream section was treated with 2, 4-D Amine in an unspecified amount. Herbicide was applied by two people over a three day time period. Surveys were conducted for seven to eight weeks, then six months, after application.Study and other actions tested
A study in the UK (European and Mediterranean Plant Protection Organisation 2009) found that use of 2,4-D amine at a concentration of 9 litres/ha eradicated skunk cabbage Lysichiton americanus, whereas glyphosate did not eradicate skunk cabbage and caused only limited reduction of growth of the plants. The 2,4-D amine was applied in the month of May at a private garden in Sussex, and at Sheffield Park Garden National Trust property. Glyphosate was applied at a site in Scotland. No further information was available.Study and other actions tested