METRIC · COLONY HEALTH
Varroa Load (VML)
Density of Varroa destructor mites on adult bees, the dominant driver of colony loss and viral transmission.
Colony HealthUnit: mites/100 beesWeekly
Formula
Phoretic mites recovered per 100 adult bees via alcohol wash or imager count.
Thresholds & Bands
| Band | Range | State |
|---|---|---|
| Low | < 1 | ok |
| Elevated | 1-3 | warn |
| Critical | ≥ 3 | crit |