date:Aug 09, 2012
Using grass carp to remove invasive weeds from waterways is an effective biological control, but it always comes at a cost - large numbers of fish are required, they remain in the waterway until they die and they indiscriminately remove all plants present, including desirable non-target species.
The study, carried out for MPI by National Institute of Water and Atmospheric Research (NIWA) scientists, found that if an unwanted aquatic weed species is found at an early enough stage, there is poten