Aimee Code takes special precautions when she receives a perennial plant as a gift. If she doesn’t know how it was grown, she’ll remove it from the potting soil and replant it. Then she’ll cut off the blossoms for several seasons to reduce the risk of exposing bees and other pollinators to neonicotinoid insecticides. As the Pesticide Program director for the Xerces Society for Invertebrate Conservation (xerces.org), she’s all too aware of the toxic nature of this class of insecticides to bees, caterpillars, butterflies and other pollinators. Neonicotinoids — sometimes referred to as “neonics” — are systemic insecticides used to treat insect pests.