📋 Steps
1
Identify flea hotspots in the yard
Fleas don't distribute evenly across a yard. They concentrate where pets spend time (sleeping areas, paths, shade), where wildlife passes through (fence lines, garden edges), and where organic material accumulates (leaf piles, mulch beds, wood piles). Map these areas before treating.
2
Apply bifenthrin to flea hotspot areas
Mix bifenthrin 7.9% at 0.5-1 fl oz per gallon. Apply to: pet resting areas, lawn surfaces where pets run, along fence lines, under decks and porches, and in dense ground cover. Allow to dry completely before pets return (30-60 minutes).
3
Apply an IGR (pyriproxyfen) to prevent flea development
IGRs prevent flea larvae from developing into adults. Products combining adulticide and IGR (Ultracide, Precor 2000) provide both functions. Apply IGR to the same areas as the contact spray. The IGR persists for months, providing extended protection beyond the spray residual.
4
Exclude or deter wildlife that reintroduce fleas
Raccoons, opossums, stray cats, and foxes carry fleas and reintroduce them to treated yards. Secure trash cans, remove food attractants, and use motion-activated sprinklers at fence gaps. Without addressing wildlife, yard populations will reestablish.
5
Treat simultaneously with indoor and pet treatment
Yard treatment alone fails if the indoor environment and pets aren't treated simultaneously. All three components — yard, indoors, and pets — must be treated on the same day for the protocol to work.
💡 Tips
- Treat the yard in late morning when dew has dried and before afternoon heat — optimal conditions for bifenthrin application and drying
- Sand and loose soil areas under decks are ideal flea larval habitat — treat these thoroughly with both contact spray and IGR
- Shaded areas retain flea populations better than sunny open areas — focus extra treatment on shaded lawn sections and under trees
- Mowing the lawn before treatment improves penetration to the soil surface where larvae live
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