Journal of Economic Entomology (1996) 89, 1262-1266

David R. Smitley (1996)
Incidence of Popillia japonica (Coleoptera: Scarabaeidae) and other scarab larvae in nursery fields
Journal of Economic Entomology 89 (5), 1262-1266
Abstract: Arborvitae (Thuja occidentalis 'Pyramidalis'), Colorado blue spruce (Picea pungens), taxus (Taxus x media 'Densiformis'), and dwarf burning bush (Euonymus alata 'Compacta') nursery fields in Ohio and Michigan were sampled for Japanese beetle, Popillia 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 (Fab.) were also found in nursery fields. S. arboricola larvae could be mistaken for Japanese beetle because they have a similar rastral pattern. The labrum 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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
quarantine treatments/regulations/aspects

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Popillia japonica	Spruce (Picea)	U.S.A. (NE)
	Popillia japonica	Yew (Taxus)	U.S.A. (NE)
	Popillia japonica	Thuja (genus)	U.S.A. (NE)
	Popillia japonica	Euonymus (crop)	U.S.A. (NE)
	Amphimallon majale		U.S.A. (NE)
	Strigoderma arboricola		U.S.A. (NE)