Activities which result in habitat degradation are the principal threat to B. petterdi, including pollution of the waterway. Sources of chemical pollution include pesticides and herbicides, and fertiliser runoff into waterways
To avoid damage to stream habitat – do not use herbicides and pesticides in the vicinity of populations known localities where this could lead to input of chemicals into the waterway
To avoid damage to stream habitat – avoid application of fertiliser in the vicinity of populations known localities where this could lead to runoff of fertiliser into the waterway.