| Title: | "Attraction, Oviposition Preferences, and Olfactory Responses of Corn-Infesting Ulidiidae (Diptera) to Various Host-Based Substrates" |
| Author(s): | Owens D; Nuessly GS; Kendra PE; Colquhoun TA; Seal DR; |
| Address: | "Everglades Research and Education Center, University of Florida, 3200 E. Palm Beach Rd., Belle Glade, FL 33430. USDA-ARS Subtropical Horticulture Research Station, 13601 Old Cutler Rd., Miami, FL 33158. Department of Environmental Horticulture, University of Florida, 1523 Fifield Hall, P.O. Box 110670, Gainesville, FL 32611. Tropical Research and Education Center, University of Florida, 18905 SW 280?St., Homestead, FL 33031" |
| ISSN/ISBN: | 1938-2936 (Electronic) 0046-225X (Linking) |
| Abstract: | "Fresh market sweet corn (Zea mays L., convar. saccharata var. rugosa, Poales: Poaceae) ears produced in Florida are damaged by the larvae of Euxesta stigmatias Loew, Euxesta eluta Loew, and Chaetopsis massyla Walker (Diptera: Ulidiidae) that renders ears unmarketable. No standard lure exists for monitoring these pests. Oviposition substrate and attractant bioassays were designed to identify attractive substrates for further semiochemical investigation. Frass from the fall armyworm, Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae), was more attractive than other ovipositional substrates tested for E. eluta and C. massyla, and resulted in greater ovipositional output. Tassel-derived armyworm frass was more attractive than leaf-derived frass for oviposition. Frass also resulted in greater oviposition output by two species. In attraction bioassays, frass was generally preferred over the corresponding corn tissue, and only C. massyla demonstrated a preference for silk-frass over tassel-frass. The most promising substrates were then evaluated by electroantennography (EAG) to quantify olfactory responses. Frass volatiles also elicited greater antennal responses than corn volatiles. With tassel-frass, greater amplitude EAG responses were recorded from immature E. eluta female antennae, while mature female E. stigmatias exhibited greater responses. Equivalent antennal response to silk-frass was observed from E. eluta. Overall, silk-frass elicited the greatest EAG responses among all three fly species. Our results indicate that armyworm frass is an important resource in the chemical ecology of corn-infesting silk flies, and this substrate warrants further investigation for potential attractants that may facilitate development of novel management tools for these pests" |
| Keywords: | Animals *Chemotaxis Diptera/*physiology Feces/chemistry Female Male *Olfactory Perception *Oviposition Volatile Organic Compounds/*metabolism Zea mays/growth & development Chaetopsis Euxesta Spodoptera frass electroantennography semiochemical; |
| Notes: | "MedlineOwens, D Nuessly, G S Kendra, P E Colquhoun, T A Seal, D R eng England 2017/05/19 Environ Entomol. 2017 Aug 1; 46(4):885-894. doi: 10.1093/ee/nvx096" |
