A marked increase in cases of rodenticide misuse may be contributing to resistance in rats and causing harm to non-targeted wildlife. This comes as the Campaign for Responsible Rodenticide Use (CRUU) revealed that in the past two years of surveillance, more than 90% of barn owls were found to carry rodenticide residues. CRUU chairman Alan Buckle said: "Undoc-umented allegations of [rodenticide] misuse or abuse are not difficult to come by. These include, for example, rodenticide blocks thrown liberally along hedge bottoms, and old tractor tyres laid flat and filled with poison bait along field edges.
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