Spray-grazing is not without risks to livestock and the pasture.
The intent of spray-grazing is to remove broadleaf weeds to create space for desirable species to expand. An integrated approach to weed management is required, otherwise the benefits from the technique will be lost.
If those desirable species are not present, bare ground will eventually be populated by other weeds. Therefore, the decision to use this technique should take into consideration the existing plant population.
Grazing management and soil fertility are also important to create a favourable environment for the desirable species to compete against the weeds.
There is also likely to be a temporary reduction in pasture growth. This is partially offset by the stock eating weeds they would generally avoid, however some short-term reduction in pasture growth will be encountered. The technique should be used sparingly and avoided when feed supply is low.