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Japanese Beetle Control on Purple Plum Trees

Japanese beetles skeletonize purple plum leaves. Multiple insecticide options exist, but timing and coverage are critical.

Effective Insecticides

Acephate (Orthene)
Carbaryl (Sevin)
Cyfluthrin (Bayer Advanced)
Lambda-cyhalothrin (Spectracide Triazicide)
Esfenvalerate (Ortho Bug-B-Gon)
Permethrin (Spectracide Bug Stop)
Neem oil (Bon-Neem) - deterrent, not knockdown

Critical Application Factors

Spray when beetles active (clear days, 84-95°F, low wind)
Thorough coverage—beetles start at tree top
Reapply after rain or 7-10 days
Watch for mite/aphid flare-ups from pyrethroids
Rotate chemical classes

Beetle Bag Reality

Pheromone traps attract MORE beetles from up to a mile away. Research shows they increase local populations. For few trees, spraying beats trapping. Community-wide trapping works better.

Integrated Approach

Hand-pick early morning (7 AM, sluggish beetles)
Soapy water bucket for disposal
Milky spore for grub control (long-term)
Neighborhood coordination maximizes impact

Trees: Flowering Plum Defoliation: Japanese Beetle Feeding; Japanese Beetles on Japanese Maple: Identification and Control; Valuing a Lost Purple Plum Tree for Insurance Claims; Japanese Beetle Devastation on Plum Tree: Systemic Protection; Plum Tree Leaf Damage: Japanese Beetles and Control Options; Uprooted Purple Plum: Survival Chances and Reset Procedure; Borers in Japanese Plum Trees: Identification and Control; Japanese Beetles on Thundercloud Plum: Control and Host Range; Stopping Fruit on a 'Fruitless' Purple Plum; Leaf Damage on New Purple Leaf Plum

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