Pest Management Science (2009) 65, 381-390

Jason B. Oliver, Michael E. Reding, Nadeer N. Youssef, Michael G. Klein, Bert L. Bishop and Phil A. Lewis (2009)
Surface-applied insecticide treatments for quarantine control of Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), larvae in field-grown nursery plants
Pest Management Science 65 (4), 381-390
Abstract: BACKGROUND: Japanese beetles, Popillia japonica Newman, are a quarantine challenge for nursery shipments from infested to non-infested states. Marathon (imidacloprid) and Discus (imidacloprid + cyfluthrin) are approved preharvest nursery treatments (US Domestic Japanese Beetle Harmonization Plan; DJHP). This study evaluated approved and non-approved (acephate, carbaryl, clothianidin, dinotefuran, halofenozide, thiamethoxam, trichlorfon) preharvest treatments, optimal rates (labeled 1×, 0.3-0.75× or 2-3×) and optimal timings (June, July, August and September) to control early-instar (grubs) P. japonica in field nurseries.
RESULTS: Most insecticides effectively reduced grub densities, except for acephate, carbaryl and trichlorfon. Clothianidin, thiamethoxam and halofenozide provided grub control equivalent to DJHP standards during most years. Across all test years and timings, percentage grub reductions were: Marathon (1×: 59.2-100; 3×: 78.9-100), Discus (1×: 60.7-100), clothianidin (1×: 96.1-100; 3×: 97.4-100), thiamethoxam (1×: 75.0-100; 3×: 80.0-100), halofenozide (1×: 70.0-100; 3×: 90.0-100) and dinotefuran (1×: 13.2-88.2; 3×: 71.1-93.4).
CONCLUSIONS: July application was more consistent and effective than other timings, and higher rates (2× and 3×) did not generally improve grub control. Overall, clothianidin, thiamethoxam and halofenozide (and dinotefuran applied in August) were equivalent to current DJHP standards. These insecticides may be suitable for DJHP Category 2 states, potentially lowering grower costs.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jason B. Oliver, Michael G. Klein, Phil A. Lewis

Research topic(s) for pests/diseases/weeds:
control - general
quarantine treatments/regulations/aspects

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Popillia japonica