Both nematodes (Heterorhabditis) and milky spore take years to reduce grubs; beetles fly in from neighbors. Apply nematodes Aug-Sept with irrigation. Neighborhood-wide treatment needed for real impact.
See Japanese Beetle Control, Pest Control with Nematodes.
Nutsedge Eradication: The Water Weeder Tool
Japanese Beetle Decline Linked to Dry Summer
Beneficial Nematodes: Better for Greenhouses Than Gardens
Japanese Beetle Resistant Plants for Southern Landscapes
Managing Root-Knot Nematodes in Tomato Gardens
Asparagus Beetle Control: Sanitation, Hand-Picking, and Persistent Spraying
Japanese Beetles on Knock Out Roses: Effective Control
Identifying and Controlling Sandspurs in North Texas
Chemical Control of Japanese Knotweed: What Works (and What Doesn’t)
Eliminating Cigarette Beetles from Your Pantry: A 5-Step Plan
Fly Control: Forget Black Powder, Use Flypaper and Eliminate Breeding Sites
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