Cardboard tubes in bee hotels invite the most parasites
Lankford BB, Escobedo M, Yoo S, Youngsteadt E, Willett DS
Pollinators
If you've put up a bee hotel to help native pollinators, the material you chose and how often you clean it can determine whether you're raising bees or breeding their parasites.
Bee hotels are meant to give native bees and wasps a safe place to nest, but they can also become parasite breeding grounds if left unmanaged. Researchers compared cardboard, reed, and bamboo nesting tubes and found cardboard harbored far more parasites than the other materials. They also tested removable 'emergence boxes' that let caretakers pull overwintering bees out to clean the hotel without disturbing them, and found these boxes stayed nearly parasite-free.
Key Findings
Cardboard nest tubes had far higher parasitism rates than reed, bamboo, or plant-stem materials across multiple parasite families.
A family-level biodiversity survey identified several parasite groups commonly infesting pollinator hotel cavities.
Emergence boxes used to house overwintering bees during maintenance showed very few new parasite holes and almost no new nest construction.
chevron_right Technical Summary
Pollinator 'bee hotels' can accidentally breed parasites, but a new study found that ditching cardboard nesting tubes and adding simple removable emergence boxes dramatically cuts infestation while safely housing overwintering bees.
Abstract Preview
Original paper
Parasite hideouts: Preserving native cavity-nesting Hymenoptera through pollinator hotel management.
As many pollinator populations around the world decline due to habitat loss, improving management practices for native pollinators becomes a priority. Pollinators are essential to healthy ecosystem...
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