Fig 2. Mean 24 h mortality (±SE) of honey bees fed 1 μg/ml ivermectin treated with low concentrations of inhibitors.

Bees fed Pristine (Prist), quercetin (Querc), fumagillin (Fumag) and verapamil (Verap) in sucrose syrup. All inhibitor/doses shown had significantly greater mortality than the ivermectin-only control (P < 0.002).