Systemic Insecticides and Bees: Safer Aphid Control for Flowering Plants

A gardener uses systemic insecticides for aphids on perennials and trees but avoids them on flowering plants due to bee/butterfly concerns. They ask if pesticides enter flower nectar.

Yes, They Can

Jack DeAngelis confirms systemic insecticides like imidacloprid can translocate into nectar and pollen, implicating them in honeybee Colony Collapse Disorder. Using systemics for aphids in home gardens is overkill and risky.

Safer Alternative: Insecticidal Soap

Insecticidal soap controls aphids and spider mites effectively, is practically non-toxic, and safe for pollinators once dry. How to use insecticidal soap.

Apply early morning or evening to minimize pollinator contact. Repeat as needed. For heavy infestations, a strong water spray can dislodge many aphids first.