Biology and management of striped cucumber beetle and bacterial wilt in cucurbits
Shelby Fleischer, email@example.com, Pennsylvania State University, Dept Entomology, University Park, PA, PA, Carlos Garcia-Salazar, firstname.lastname@example.org, MSU Extension Central Region - Ottawa Co, 333 Clinton Street, Grand Haven, MI, Christa Ellers-Kirk, ckirk@Ag.arizona.edu, University of Arizona, Department of Entomology, 410 Forbes Bldg, Tucson, AZ, Matthew J. Blua, email@example.com, University of California - Riverside, Dept. Entomology, Riverside, CA, and Frederick E. Gildow, firstname.lastname@example.org, Pennsylvania State University, Dept. Plant Pathology, Buckhout Laboratory, University Park, PA.
We review biological relationships among a beetle vector, Acalymma vittatum, the plant-pathogenic bacterium Erwinia tracheiphila, and their mutual cucurbit hosts, and discuss integrated management of both vector and pathogen. Both vector and pathogen have strong direct relationships with cucurbits. Host range of the pathogen is limited to the cucubitaceae. Life table data of A. vittatum suggests a relatively long-lived adult vector with continuous egg production, requiring a constant food source. Some in-field adult overwintering helps synchronize phenology and dispersion of the pathogen-carrying vectors with cucurbit hosts. Pathogen location and replication within the beetle occurs mostly at the mid-to-hindgut juncture, and bacterial cells are inoculated to host plants through feces. Behavioral patterns associated with host-finding and mate-guarding aid in achieving higher transmission titers, which accelerates disease expression. Overwintered beetles carry the pathogen, albeit at low rates, and epidemiological patterns are explored through measures of rates pathogen-carrying vectors in overwintered beetles, and in beetles throughout the growing season. Management options consider relationships among host susceptibility, planting time and density, time of beetle immigration, systemic and foliar insecticides, mulch color, pathogens directed at insect larvae, crop phenology, and beetle density. Research gaps are discussed.
Species 1: Coleoptera Chrysomelidae Acalymmavittata (striped cucumber beetle)