The “Bucket of Doom” is a low-cost ovitrap: it attracts egg-laying female mosquitoes into water treated with BTI, so their entire brood dies before it can ever take wing. Build one in an afternoon for about five dollars.
Four steps to build it, then a slider to see how a couple of buckets add up over an Iowa summer.
The container
Start with a dark 5-gallon bucket (black, dark green, or navy). Drill a few small overflow holes about 3 inches below the rim so a heavy Iowa downpour tops it up instead of flushing your BTI onto the lawn.
The bait
Fill it halfway with tap or rain water and drop in a handful of grass clippings, straw, or dry leaves. Over a day or two it ferments into a stagnant “tea” that egg-laying females can’t resist.
The BTI
Float a quarter of a Mosquito Dunk (or a teaspoon of Bits) on top. This bacterium kills the larvae that hatch within a day or two and is harmless to pets, birds, and fish. Refresh about every 30 days.
Placement & escape stick
Set it in shade, out of the wind — behind the garage or under a shrub. Lean a stick out of the water so any chipmunk or bird that takes a dip can climb out.
See how a few buckets add up
Slide to your backyard trap count and watch the estimated impact over a 90-day Iowa summer, June through August.
Illustrative estimate — real numbers depend on your yard, but the direction is real: every trap removes a chunk of the next generation.
Not sure how much BTI to add here or in the rest of your yard? The BTI calculator gives you the right dose for any kind of standing water.