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Empirical, Metagenomic, and Computational Techniques Illuminate the Mechanisms by which Fungicides Compromise Bee Health
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Managing orchard groundcover to reduce pollinator foraging post-bloom.

Robert McDougall1, Anna DiPaola2, Brett Blaauw3

  • 1Department of Entomology, Rutgers University, Bridgeton, NJ, USA.

Pest Management Science
|April 11, 2021
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Summary

Removing flowering weeds in orchards significantly reduced pollinator foraging and pesticide exposure. This groundcover management protects bees and other pollinators during the critical post-bloom period.

Keywords:
insecticideorchardspeachpollinator conservationweeds

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Area of Science:

  • Agricultural Science
  • Ecology
  • Entomology

Background:

  • Insecticides in agriculture are linked to pollinator decline.
  • Orchard weed management is crucial for integrated pest management.
  • Flowering weeds in orchards can lead to pollinator pesticide exposure post-bloom.

Purpose of the Study:

  • To test if removing orchard groundcover weeds reduces pollinator foraging after flowering.
  • To assess the impact of weed removal on pollinator exposure to pesticides.

Main Methods:

  • Herbicide application to remove flowering broadleaf weeds in nectarine orchard groundcover.
  • Assessment of pollinator visitation using visual observations, sweep netting, and blue vane traps.

Main Results:

  • Herbicide-treated plots showed significantly lower pollinator abundance, richness, diversity, and evenness.
  • Reduced pollinator activity was observed in areas with fewer flowering weeds.
  • Blue vane traps did not detect significant differences in pollinator activity.

Conclusions:

  • Orchard groundcover management effectively reduces post-bloom pollinator foraging.
  • This strategy can help prevent beneficial organism exposure to harmful insecticides.
  • Integrated pest management can be enhanced by considering groundcover's role in pollinator protection.