What we have found is that imidacloprid and thiamethoxam, but not clothianidin, exhibit toxicity to bumblebee colonies when exposed at field-relevant levels. Chris Connolly More Quotes by Chris Connolly More Quotes From Chris Connolly Small changes in the pesticide structure or its target site in insects are likely to be critical to risk assessment, each pesticide/insect combination needs to be considered independently. Chris Connolly environment