🐝 Walk-Away Splits vs Controlled Splits

About this simulation

Both increase methods take frames of brood, food and bees from a strong colony and move them into a new box. The difference is what happens next. A walk-away split is left queenless: the bees must select young larvae and raise their own emergency queen cells, wait for her to emerge, mature and fly out to mate, then start laying — a process that can take three to five weeks. A controlled split is given an already-mated, laying queen (usually in an introduction cage), so egg-laying resumes almost immediately.

How it works

• Left hive — walk-away split: no queen at day 0, emergency cells build, a virgin queen emerges around day 12, mates by ~day 19 and starts laying around day 23.
• Right hive — controlled split: a caged mated queen is released within a few days and resumes laying almost immediately.
• Because the walk-away split has no eggs being laid for over three weeks, the colony passes through a genuine brood break — a stretch with no capped brood at all, which starves phoretic Varroa mites of the only cells they can reproduce in.
• The mite-load dots on each frame track this: the walk-away hive's mite load visibly falls during its broodless window, while the controlled split's mite load keeps climbing with almost no interruption.

Controls

• Day since split — scrub the 0–40 day timeline for both hives at once.
• Frames given to split — more brood/bee frames means a larger starting colony and faster buildup in both hives.
• Show Varroa mite overlay — toggle the red mite dots on the frames.
• Autoplay — runs the timeline forward automatically; Reset jumps back to day 0.

Did you know?

Because a walk-away split's natural brood break can knock down phoretic Varroa mite numbers by roughly a third to a half with no chemical treatment at all, some beekeepers deliberately time splits as a mite-management tactic — trading a few weeks of population growth for a real dent in mite pressure.