Incidence of Papillia japonica (Coleoptera: Scarabaeidae) and Other Scarab Larvae in Nursery Fields

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Arborvitae (Deja occidentals 'Pyramidal'), Colorado blue spruce (Peace pungent), taxes (Taxus x media 'Densiformis'), and dwarf burning bush (Eponymous Alta 'Compacts') nursery fields in Ohio and Michigan were sampled for Japanese beetle, papilla japonica Newman, adults and larvae. Nursery fields in counties with the highest adult catches were the most likely to have larvae in the field. Nursery fields where <5,000 beetles per trap were caught during 4 wk of peak activity were unlikely to be infested with larvae (5 larvae in 3,120 cup-cutter samples). Larvae were 4-fold more abundant in grassy areas bordering fields than in nursery fields. Weedy nursery fields supported 10-fold more larvae than clean fields. European chafer, Rhizotrogus majalis (Razoumowsky); Phyllophaga sp.; and Strigoderma arboricola (Fabe.) were also found in nursery fields. S. arboricola larvae could be mistaken for Japanese beetle because they have a similar astral pattern. The labium should be examined to confirm identification of these 2 species. Nurseries located in areas where Japanese beetles are active should keep fields as free of weeds as possible to minimize the risk of shipping larvae in the root system of nursery plants to states where Japanese beetle is not yet established.

Document Type: Research Article

Publication date: October 1, 1996

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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