Japanese Beetle

Pest: Japanese Beetle (Popillia japonica)

Pest Type: Insect Pest

Major Identifying Features: Adults are oval shaped and about 1/2 inch long, the head and thorax are metallic green, wings are coppery brown bordered with green, antennae form a club to each end, five patches of white hair protrude from each side of the abdomen, eggs are cream-colored, larvae are c-shaped, creamy white with a brown head capsule

Life Cycle: One complete generation per year (in cooler climates 1 every two years), adults emerge in July and August and live for six weeks, females release a powerful sex pheromone to attract males for mating, 40-60 eggs are laid 2-4 inches deep into the soil

Pest Rating: Moderate to invasive

Management Rating: Difficult

Host/Season/Outbreak Information: The Japanese beetle is native to Japan and can be found in China, Russia, Portugal, Canada, and the U.S., beetles feed on the foliage of trees, shrubs, and vines

Damage Information: Beetles can give the plants a skeletonized appearance, delicate leaves and petals can be completely consumed, damaged leaves attract even more beetles, grubs feed on the roots and root hairs, they are major pests in pastures, lawns, etc., damaged plants can show wilting, yellowing, or death

Management Options: Monitoring is very important with pheromone traps, cultural control by trapping and habitat modification with plants that are less attractive to Japanese beetles, biological control with nematodes and milky spore disease, chemical control with insecticides (WARNING ON THE USE OF CHEMICALS)




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