Unspecified - #6 of 6 stressors by reach
Colonies a beekeeper reported as stressed without being able to name a single cause.
Of the 6 stressor categories USDA tracks, Unknown is the 6th-most reported, touching 3.1% of U.S. colonies last quarter. Here's where it concentrates, how it moves through the year, and which pollination crops walk hives into it - all from public USDA aggregates.
USDA asks beekeepers each quarter what share of their colonies each stressor touched. For unknown, here are the states reporting the heaviest load this spring - measured against the U.S. average.
Share of each state's colonies reporting unknown (2025 Q2), against the U.S. average of 3.1%. Tap a state for its full profile.
Unknown is not steady through the year. Six straight quarters of real USDA readings show how the pressure shifts from season to season.
Share of U.S. colonies affected, six straight quarters of USDA readings.
Pollination contracts walk hives straight into local conditions. This ranks every tracked crop by the unknown load across its growing states - a colony-weighted read of what a hive meets at each bloom.
Colony-weighted unknown load across each crop's growing states, vs the U.S. average. Tap a crop for its profile.
Derived Colony-weighted average across the growing states USDA reports for each crop. USDA measures stressors by state, not by crop.
Every category USDA tracks. Switch to any of them.