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Oral Presentation

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Student Competition

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Student 10-Minute Presentation Competition

Medical, Urban, and Veterinary Entomology

Student Competition

Student

Grad 10-min Competition: MUVE, Insecticides

Resistance profiling of German cockroaches across the continental U.S.

Monday, November 10, 2025

9:24 AM - 9:36 AM Pacific

Location: Oregon Convention Center, Portland Ballroom 252, OCC

Presenting Author(s)

JL

Jun-Yin Lum

PhD candidate
University of California
Riverside, California

Co-Author(s)

Michael Rust

Professor of Entomology, Emeritus
University of California
Hemet, California
Dong-Hwan Choe, BCE

University of California
Riverside, California

Co-Author(s)

Chow-Yang Lee, BCE (he/him/his)

Professor & Endowed Chair in Urban Entomology
University of California
Riverside, California

The German cockroach, Blattella germanica (L.) is a medically and economically important urban pest found worldwide. Chemical control of this major pest is impeded by widespread insecticide resistance towards various active ingredients. In this study, we evaluated the resistance profiles of field-collected German cockroaches collected from selected locations in the US. Three insecticides (deltamethrin, fipronil, indoxacarb) were selected for the evaluation as representatives of commonly used classes of active ingredients in spray and bait formulations. The field strains of German cockroach were also screened for the presence of target-site mutations including kdr and Rdl. The implication of the findings on the management of the German cockroach is discussed.