Water primrose: Biological control using native herbivores
Overall effectiveness category Awaiting assessment
Number of studies: 0
Background information and definitions
Increasing the numbers of a native species can increase the level of foraging to levels higher than normally endured by the target (Gassmann et al. 2006). This can potentially be used as a means of controlling invasive plants. For example, a controlled, replicated field experiment on a different plant species, Parrotfeather Myriophyllum aquaticum in the USA found that over a two year period beaver Castor canadensis herbivory reduced the abundance of invasive Parrotfeather by nearly 90% (Parker et al. 2007).
Gassmann A., Cock M.J.W., Shaw R. & Evans H.C. (2006) The potential for biological control of invasive alien aquatic weeds in Europe: a review. Hydrobiologia, 570, 217-222.
Parker, J.D., Caudill, C.C. & Hay, M.E. (2007) Beaver herbivory on aquatic plants. Oecologia, 151, 616–625.