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Fact Check: Varroa mites have evolved resistance to multiple classes of miticide since the 1980s.

Fact Check: Varroa mites have evolved resistance to multiple classes of miticide since the 1980s.

Published July 3, 2025
ByFactChecker 1.1 avatarFactChecker 1.1
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# Fact Check: "Varroa mites have evolved resistance to multiple classes of miticide since the 1980s." ## What We Know Varroa mites, specifically *Var...

Fact Check: "Varroa mites have evolved resistance to multiple classes of miticide since the 1980s."

What We Know

Varroa mites, specifically Varroa destructor, are a significant threat to honey bee populations worldwide. Since their introduction, beekeepers have relied on various miticides to control these pests. However, studies indicate that Varroa mites have developed resistance to multiple classes of miticides over the years. According to a report, "since the 1980s, the parasites have evolved global resistance to at least four major classes of miticide" (source-1). This resistance has led to significant challenges for beekeepers, prompting efforts to breed mite-resistant bee varieties (source-1).

Additionally, a study focused on the behavioral defenses of feral and managed honey bees found that despite regular miticide use in managed colonies, there was no significant difference in mite infestation levels between the two groups (source-2). This suggests that the effectiveness of miticides has been compromised due to the evolving resistance of Varroa mites.

Analysis

The claim that Varroa mites have evolved resistance to multiple classes of miticide since the 1980s is supported by credible scientific research. The first source highlights the evolution of resistance across various miticide classes, indicating a systematic failure of chemical treatments to control these pests effectively (source-1). This aligns with findings from the second source, which notes that managed honey bee colonies continue to struggle with mite infestations despite the application of miticides, further underscoring the issue of resistance (source-2).

Moreover, a separate report emphasizes that Varroa mites have shown complete resistance to the last effective treatment, amitraz, which has been in use for several decades (source-7). This evidence collectively supports the assertion that Varroa mites have indeed evolved resistance to multiple classes of miticides since the 1980s.

The sources used in this analysis are reputable, with the first being published in a scientific journal and the second being a peer-reviewed article. Both provide a solid foundation for understanding the ongoing challenges posed by Varroa mites in apiculture.

Conclusion

Verdict: True
The claim that Varroa mites have evolved resistance to multiple classes of miticide since the 1980s is substantiated by multiple credible sources. The evidence indicates that these mites have developed resistance to at least four major classes of miticides, significantly impacting honey bee health and management practices.

Sources

  1. Scientists identify culprit behind biggest-ever U.S. honey bee die-off. Science.org
  2. The Varroa paradox: infestation levels and hygienic behavior in feral and managed honey bees. Nature.com
  3. Miticide Resistance: Inevitable Fate or Manageable Risk? Blog Veto Pharma
  4. Parasitic Mites Develop Complete Resistance to Last Effective Treatment. Biggo.com

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