Install robbing screens on vulnerable hives

Mount a robbing screen over the hive entrance to create an alternate entry path that resident bees learn but robbers cannot find. The screen blocks the direct entrance and redirects the colony's bees through a side or top opening that they quickly memorize.

Why It Works

Robber bees navigate to the scent of honey at the main entrance and attempt to push straight in. A robbing screen covers that entrance with mesh, blocking direct access while providing a hidden secondary entrance at the screen's edge. Resident bees learn the new path within hours, but robbers fixate on the blocked main entrance and eventually give up. This exploits the difference between learned behavior (residents) and scent-driven opportunism (robbers).

Tips

• Install screens proactively on weak colonies, nucs, and recently split hives before robbing begins
• Commercial screens from suppliers like Brushy Mountain or Mann Lake typically cost $8-15 each
• A DIY version can be built from #8 hardware cloth and a wooden frame for under $5
• Remove screens once the nectar flow returns, as they slightly impede normal traffic
• Combine with entrance reduction for maximum protection on the weakest colonies