Hoplia Beetle

Pest: Hoplia Beetle (Hoplia callipyge)

Pest Type: Insect Pest

Major Identifying Features: Adult beetles are oval, and about 1/4 inch long, head and thorax are dark, wing covers brown, body is a iridescent silvery green, larvae are small that live in the soil

Life Cycle: Female beetles lay glossy, white eggs in the soil of alfalfa fields, pastures, and in other areas of undisturbed areas, larvae feed on decaying plant material and roots, they develop slowly and overwinter in the soil in the pupal stage, in early spring adults emerge from the soil and fly to gardens, there is a single generation each year

Pest Rating: Minor to moderate

Management Rating: Easy to moderate

Host/Season/Outbreak Information: Adults are active from March to early May

Damage Information: Hoplia beetles like to feed on colorful flowers such as white, yellow, apricot, and pink roses, they chew round holes in the petals which can damage early buds and flowers (not the leaves), they can also be found on the flowers of calla, citrus, irises, lilies, magnolia, olive, peonies, poppies, and strawberries

Management Options: Physical removal by handpicking beetles, or removing invested flower buds, cultural control by planting darker roses in invested areas, chemical control and sprays are generally not recommended

Sources:

http://www.ipm.ucanr.edu

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