Originally Posted by Randy Oliver
I can only imagine their surprise and disappointment when after nine weekly feedings of a full half gallon of syrup intentionally spiked to overtly toxic levels, that they still noted virtually no adverse effects! Surprisingly, the amount of broodrearing was unaffected at the 20, 40, and 200 ppb dosages, and only slightly depressed at the clearly toxic 400 ppb dose! Note that all the colonies were still alive at midwinter, fully 3 months after the dosing ended! If anything, this study clearly demonstrated that colonies of bees can survive prolonged poisoning by imidacloprid at excessively high levels!