A plant called Cyrilla racemiflora can cause larvae to turn purple. The common name is southern leatherwood or summer titi, and is a typical summer honey flow in Florida, Georgia, Mississippi and South Carolina. While purple brood may be a cool and interesting anomaly, this honey flow is poisonous to bees. If honey bees are foraging on Cyrilla racemiflora, beekeepers risk losing many of their colonies. So beekeepers must move their colonies in the presence of this poisonous plant. Symptoms include:
- larvae turning a blue or purple color
- Stress related diseases, such as European Foul Brood and Chalkbrood
- Dead adult bees with symptoms of poisoning, which included extended proboscis.
- Total colony death
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