| Title: | Detecting the Conspecific: Herbivory-Induced Olfactory Cues in the Fall Armyworm (Lepidoptera: Noctuidae) |
| Author(s): | Ingber DA; Christensen SA; Alborn HT; Hiltpold I; |
| Address: | "Department of Entomology and Wildlife Ecology, University of Delaware, Newark, DE 19716, USA. United States Department of Agriculture, Agricultural Research Service, Gainesville, FL 32608, USA. Agroscope Changins, Entomology in Field Crops and Viticulture, Plant Protection Strategic Research Division, 1276 Nyon, Switzerland" |
| ISSN/ISBN: | 2218-1989 (Print) 2218-1989 (Electronic) 2218-1989 (Linking) |
| Abstract: | "The fall armyworm (FAW), Spodoptera frugiperda (Smith), is a polyphagous pest whose larval feeding threatens several economically important crops worldwide with especially severe damage to corn (Zea mays L.). Field-derived resistance to several conventional pesticides and Bt toxins have threatened the efficacy of current management strategies, necessitating the development of alternative pest management methods and technologies. One possible avenue is the use of volatile organic compounds (VOCs) and other secondary metabolites that are produced and sequestered by plants as a response to larval feeding. The effects of conspecific larval feeding on fall armyworm oviposition preferences and larval fitness were examined using two-choice oviposition experiments, larval feeding trials, targeted metabolomics, and VOC analyses. There was a significant preference for oviposition on corn plants that lacked larval feeding damage, and larvae fed tissue from damaged plants exhibited reduced weights and head capsule widths. All larval feeding promoted significantly increased metabolite and VOC concentrations compared to corn plants without any feeding. Metabolite differences were driven primarily by linoleic acid (which is directly toxic to fall armyworm) and tricarboxylic acids. Several VOCs with significantly increased concentrations in damaged corn plants were known oviposition deterrents that warrant further investigation in an integrated pest management context" |
| Keywords: | Faw Hipv Spodoptera frugiperda Voc corn management metabolites oviposition; |
| Notes: | "PubMed-not-MEDLINEIngber, David A Christensen, Shawn A Alborn, Hans T Hiltpold, Ivan eng 2015-31100-06010/U.S. Department of Agriculture/ n/a/University of Delaware/ n/a/Dow-DuPont/ Switzerland 2021/09/27 Metabolites. 2021 Aug 30; 11(9):583. doi: 10.3390/metabo11090583" |
