Japanese Beetle Control on Purple Sand Cherry

Gardener seeks Japanese beetle control after last summer's infestation on purple sand cherries.

Options by Population Level

Low numbers: Hand-pick in morning, drop in soapy water.
Avoid pheromone traps—attract more than they kill unless used area-wide.
High numbers: Insecticides with acephate, carbaryl, bifenthrin, cyfluthrin, deltamethrin, lambda-cyhalothrin, permethrin. Apply every 5–10 days during peak activity.
Systemic option: Imidacloprid (Bayer Advanced Tree & Shrub) applied ≥20 days before adult emergence.
Soil treatments for grubs don't reduce adults (they fly in).

Plant Diseases: Flowering Plum Defoliation: Japanese Beetle Feeding; Why Are My Japanese Beetles So Large? Identifying Look-Alikes; Managing Japanese Beetles on Roses in Zone 6; Japanese Beetle Devastation on Plum Tree: Systemic Protection; Japanese Beetles on Crepe Myrtle: Rotate Insecticides, Manage Mites; Timing Milky Spore for Japanese Beetle Grub Control in Indiana; How to Control Japanese Beetles: Organic Strategies for a Pesky Pest; Stop Japanese Beetles: Effective Control Methods; Japanese Beetles: Identification and Integrated Management; Does Tansy Really Repel Japanese Beetles? The Science Behind Companion Planting

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