Queen bees transfer pesticide buildup into eggs when workers are overwhelmed
Encerrado-Manriquez AM, Fine JD, Litsey E, Baliu-Rodriguez D, Leonard SP
Pollinators
Every tomato, apple, and squash in your garden depends on bees that are quietly absorbing pesticides even at low doses - and now we know those chemicals can move from queen to egg, threatening the next generation of the colony before it even hatches.
Scientists tracked a pesticide as it moved through a small honeybee colony and found that worker bees do a remarkable job of filtering it out, reducing levels by about 95%. But the queen bee, while mostly protected, slowly builds up the pesticide in her reproductive organs and eventually passes it into her eggs. When the colony's collective defenses get pushed too hard, the queen essentially protects herself by offloading her chemical burden onto the next generation.
Key Findings
Worker bees reduced dietary pesticide levels by 95% through filtering and honeycomb deposition, though effectiveness declined to 86% by day 10.
Queen bees maintained lower pesticide levels than workers but accumulated the compound in their ovaries over time, transferring it into developing eggs.
The queen's presence reshaped colony-wide pesticide distribution, concentrating worker exposure and increasing deposition in wax.
chevron_right Technical Summary
Honey bee colonies act as collective detoxification networks, with worker bees filtering out pesticides and queen bees maintaining lower exposure - until the system is overwhelmed and queens transfer their pesticide load directly into their eggs.
Abstract Preview
Original paper
Queen bees offload pesticide burden to eggs when social buffering is overwhelmed.
Honey bee colonies pollinate about one-third of the world's food crops, and their rapid decline directly threatens agricultural productivity and ecosystem stability. Understanding how colony-level ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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