D. R. Smitley

Increasing prevalence of Ovavesicula popilliae (Microsporidia), a pathogen of Japanese beetle (Coleoptera: Scarabaeidae), in the Midwest and Northcentral United States from 1999 to 2025

D. R. Smitley, Vera Krischik, Phil Lewis, Yoshiko Nomura et autres

Distribution of Ovavesicula popilliae Andreadis & Hanula (Microsporidia) in the United States was updated by sampling 232 new sites, with a focus on prevalence in the Northcentral and Midwest regions. Results were added to 189 previously sampled sites to detect infections of …

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Extra baggage: Accidental introductions of cryptogenic pathogens of invasive insects

Ann E. Hajek, H. F. Nahrung, D. R. Smitley

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Host range evaluation of Ovavesicula popilliae (Microsporidia), a pathogen of Japanese beetle (Coleoptera: Scarabaeidae), by qPCR diagnosis of 18 species of Coleoptera

Erica Hotchkiss, D. R. Smitley, Yoshiko Nomura, Phil Lewis

Over the last 9 yr USDA-approved introductions of the pathogen Ovavesicula popilliae (Microsporidia: Ovavesiculidae) were made in 8 US states for long-term biological control of Japanese beetle, Popillia japonica (Newman) (Coleoptera: Scarabaeidae). At least two additional states are redistributing pathogen-infected beetles to …

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Augmented establishment of Ovavesicula popilliae (Microsporidia) for biocontrol of Japanese beetle (Coleoptera: Scarabaeidae) in Colorado

D. R. Smitley, Erica Hotchkiss, Whitney Cranshaw, Phil Lewis et autres

Ovavesicula popilliae (Microsporidia: Ovavesiculidae) is a host specific, obligate pathogen of Japanese beetle (Coleoptera: Scarabaeidae, JB) that causes chronic disease and mortality of larvae, and reduced fecundity of surviving females. Ten sites in Colorado along the leading edge of the westward spread …

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Improved qPCR diagnosis of Ovavesicula popilliae (Microsporidia) infection of Japanese beetles (Coleoptera: Scarabaeidae) for monitoring pathogen establishment

D. R. Smitley, Erica Hotchkiss, Phil Lewis, Yoshiko Nomura et autres

Based on reports of Japanese beetle (JB), Popillia japonica (Coleoptera: Scarabaeidae), population decline in Michigan following establishment of Ovavesicula popilliae Andreadis and Hanula (Microsporidia: Ovavesiculidae), USDA APHIS initiated a project to inoculate runway fields at major Midwest USA airports with O. popilliae, …

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Evaluation of the most popular annual flowers sold in the United States and Europe indicates low visitation rates by pollinators and large variation among cultivars

D. R. Smitley, Colin Oneil, Erica Hotchkiss, Erik S. Runkle et autres

To better understand how frequently pollinators visit the most popular annuals and the variation among cultivars, we evaluated 3-6 cultivars, each of petunia, impatiens, begonia, geranium, pansy, and New Guinea impatiens. These 6 annuals account for 46.6% of all garden center annual …

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Qpcr Tracking of Japanese Beetles (Popilliae Japonica Newman) Infected by Ovavesicula Popilliae at Introduction Sites in Colorado, United States

D. R. Smitley, Erica Hotchkiss, Phil Lewis, Whitney Cranshaw et autres

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Variation in pollinator visitation among garden cultivars of marigold, portulaca, and bidens

A Browning, D. R. Smitley, Jared Studyvin, Erik S. Runkle et autres

Due to declines in pollinator populations, many people are now interested in learning about which annual flowers they can plant in their garden to better support pollinators. However, reports of experimental evaluation of cultivars of annual flowers for attraction to pollinators are …

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Gradual Decline of Japanese Beetle (Coleoptera: Scarabaeidae) Populations in Michigan Follows Establishment of Ovavesicula popilliae (Microsporidia)

D. R. Smitley, Erin R. Hotchkiss, K Buckley, M Piombiono et autres

The purpose of this research was to document the incidence of Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), infection by the microsporidian pathogen, Ovavesicula popilliae Andreadis & Hanula (Microsporida: Pleistophoridae) while monitoring Japanese beetle populations at nine golf courses in Michigan from …

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Geographic distribution of Ovavesicula popilliae in the United States and sensitivity of visual diagnosis compared with qPCR detection

Daniel Hulbert, D. R. Smitley, Erin R. Hotchkiss, Philip Lewis et autres

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Survival of Japanese beetle, Popillia japonica Newman, larvae in field plots when infected with a microsporidian pathogen, Ovavesicula popilliae

Michael Piombino, D. R. Smitley, Philip Lewis

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Traces of Imidacloprid Induce Hormesis as a Stimulatory Conditioned Response of Sweetpotato Whitefly (Hemiptera: Aleyrodidae)

Mamy L. Rakotondravelo, D. R. Smitley, Edward J. Calabrese, Moslem Ladoni

Our purpose is to determine whether extremely low concentrations of imidacloprid (2-8 ppb) typically found in field soil 1-3 yr after a crop is grown using seed with a standard imidacloprid seed-coating could impact the fitness of whiteflies, Bemisia tabaci Gennadius (Hemiptera: …

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