How long will the rodenticide persist in the environment?
Most bait will be consumed by the rats. Some pellets will remain on the surface where molds and microbial degradation will break them down. Although brodifacoum is persistent in soils with a half-life of 157 days, it is closely bound to soil particles where it is unavailable to vertebrate scavengers. Invertebrates are not generally affected by brodifacoum. It is relatively immobile in soil and the potential for groundwater and surface water contamination is low. It eventually breaks down into carbon dioxide and water. More details can be found in the environmental assessment.
