Lethal and Sublethal Effects of Pyriproxyfen on Apis and Non-Apis Bees

Area of Science:

• Environmental toxicology
• Insect toxicology
• Pollinator health

Background:

• Pyriproxyfen is a widely used insecticide and larvicide.
• It mimics juvenile hormones, disrupting insect metamorphosis and adult emergence.
• Concerns exist regarding its impact on non-target insects, including bees.

Purpose of the Study:

• To review existing data on pyriproxyfen toxicity in honey bees (Apis mellifera) and non-Apis bees (bumble bees, solitary bees, stingless bees).
• To identify knowledge gaps regarding pyriproxyfen's effects on diverse bee species.
• To highlight the need for research on exposure routes and metabolite effects.

Main Methods:

• Literature review of scientific studies on pyriproxyfen and bee toxicity.
• Analysis of documented acute and sublethal effects on Apis mellifera.
• Identification of data scarcity for non-Apis bees.

Main Results:

• Pyriproxyfen's toxicity to Apis mellifera is well-documented.
• Data on pyriproxyfen's toxicity to bumble bees, solitary bees, and stingless bees is largely absent.
• Exposure routes and metabolite impacts on non-Apis bees remain largely unquantified.

Conclusions:

• Significant data gaps exist regarding pyriproxyfen's impact on non-Apis bees.
• Further research is crucial to assess risks to diverse bee populations, including reproductive success and metabolite effects.
• Understanding exposure pathways is essential for effective risk assessment and mitigation strategies.