| Title: | Spodoptera frugiperda Caterpillars Suppress Herbivore-Induced Volatile Emissions in Maize |
| Author(s): | De Lange ES; Laplanche D; Guo H; Xu W; Vlimant M; Erb M; Ton J; Turlings TCJ; |
| Address: | "Laboratory of Fundamental and Applied Research in Chemical Ecology, University of Neuchatel, Rue Emile-Argand 11, 2000, Neuchatel, Switzerland. Department of Entomology and Nematology, University of California Davis, 1 Shields Avenue, 367 Briggs Hall, Davis, CA, 95616, USA. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China. College of Plant Protection, Jilin Agricultural University, Changchun, China. Laboratory of Animal Physiology, University of Neuchatel, Rue Emile-Argand 11, 2000, Neuchatel, Switzerland. Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013, Bern, Switzerland. Plant Production & Protection Institute of Plant and Soil Biology, Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK. Laboratory of Fundamental and Applied Research in Chemical Ecology, University of Neuchatel, Rue Emile-Argand 11, 2000, Neuchatel, Switzerland. ted.turlings@unine.ch" |
| DOI: | 10.1007/s10886-020-01153-x |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "The vast spectrum of inducible plant defenses can have direct negative effects on herbivores, or indirect effects, for instance in the form of herbivore-induced plant volatiles (HIPVs) that attract natural enemies. Various arthropods have evolved ways to suppress plant defenses. To test whether this is the case for caterpillar-induced HIPVs, we compared the volatile induction by Spodoptera frugiperda (Lepidoptera: Noctuidae), which is particularly well adapted to feed on maize (Zea mays), with the induction by three more generalist noctuid larvae. We tested the hypothesis that S. frugiperda suppresses HIPV emissions in maize, and thereby reduces attractiveness to natural enemies. HIPV emissions triggered by S. frugiperda when feeding on maize were indeed found to be significantly weaker than by Spodoptera littoralis, Spodoptera exigua, and Helicoverpa armigera. The suppression seems specific for maize, as we found no evidence for this when S. frugiperda caterpillars fed on cotton (Gossypium herbaceum). Artificially damaged maize plants treated with larval regurgitant revealed that HIPV suppression may be related to factors in the caterpillars' oral secretions. We also found evidence that differential physical damage that the caterpillars inflict on maize leaves may play a role. The suppressed induction of HIPVs had no apparent consequences for the attraction of a common parasitoid of S. frugiperda, Cotesia marginiventris (Hymenoptera: Braconidae). Nevertheless, the ability to manipulate the defenses of its main host plant may have contributed to the success of S. frugiperda as a major pest of maize, especially in Africa and Asia, which it has recently invaded" |
| Keywords: | Animals *Herbivory Larva/growth & development/physiology Moths/growth & development/*physiology Plant Leaves/*metabolism Species Specificity Spodoptera/growth & development/physiology Volatile Organic Compounds/*metabolism Zea mays/*metabolism Cotesia mar; |
| Notes: | "MedlineDe Lange, Elvira S Laplanche, Diane Guo, Huijuan Xu, Wei Vlimant, Michele Erb, Matthias Ton, Jurriaan Turlings, Ted C J eng 31003A-122132/Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen Forschung/ 2020/02/01 J Chem Ecol. 2020 Mar; 46(3):344-360. doi: 10.1007/s10886-020-01153-x. Epub 2020 Jan 30" |
