| Title: | Volatiles from Cotton Plants Infested by Agrotis segetum (Lep.: Noctuidae) Attract the Larval Parasitoid Microplitis mediator (Hym.: Braconidae) |
| Author(s): | Li M; Xia S; Zhang T; Williams L; Xiao H; Lu Y; |
| Address: | "State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China. Institute of Entomology, Jiangxi Agricultural University, Nanchang 330045, China. Integrated Pest Management Center of Hebei Province, Key Laboratory of IPM on Crops in Northern Region of North China, Institute of Plant Protection, Ministry of Agriculture, Hebei Academy of Agricultural and Forestry Sciences, Baoding 071000, China. USDA-ARS U.S. Vegetable Laboratory, Charleston, SC 29414, USA" |
| ISSN/ISBN: | 2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking) |
| Abstract: | "Herbivore-induced plant volatiles (HIPVs), chemicals produced by plants infested by herbivorous insects, can act as kairomones that recruit natural enemies of the pest herbivore. Agrotis segetum (Denis and Schiffermuller) is a common, important pest of seedling cotton in Xinjiang Province, China, and the braconid Microplitis mediator (Haliday) is an important mortality factor of this pest's larvae. In olfactometer tests, which included healthy foliage, infested foliage, or infested roots, M. mediator preferred A. segetum-infested cotton plants to healthy cotton plants. In GC-MS analyses of plant-emitted volatiles, we found that compounds emitted increased 14.9- and 13.3- fold after leaf infestation and root infestation, respectively, compared to healthy control plants. The volatiles were mainly p-xylene, nonanal, tetradecane, decanal, benzaldehyde, beta-caryophyllene, and humulene, while linalool was only present in the leaf-infestation treatment. In addition, principal component analysis indicated that all 18 compounds were associated with the infested plants, especially beta-caryophyllene, p-xylene, and decanal. Based on the above studies and previous functional evaluations of the volatile compounds, it can be demonstrated that these compounds play a crucial role in modulating the interactions between A. segetum and M. mediator and regulating parasitoid behavior. It may be possible to enhance the biological control of A. segetum by M. mediator through the application of HIPVs" |
| Keywords: | behavioral response biological control herbivore-induced plant volatiles parasitoid wasp turnip moth; |
| Notes: | "PubMed-not-MEDLINELi, Mengyu Xia, Shike Zhang, Tao Williams, Livy 3rd Xiao, Haijun Lu, Yanhui eng U2003212/National Natural Science Foundation of China/ CARS-15-21/China Agriculture Research System/ Switzerland 2022/04/13 Plants (Basel). 2022 Mar 24; 11(7):863. doi: 10.3390/plants11070863" |
