| Title: | New slow release mixture of (E)-beta-farnesene with methyl salicylate to enhance aphid biocontrol efficacy in wheat ecosystem |
| Author(s): | Liu J; Zhao X; Zhan Y; Wang K; Francis F; Liu Y; |
| Address: | "College of Plant Protection, Shandong Agricultural University, Taian, China. Functional and Evolutionary Entomology, Terra, Gembloux Agro-Bio Tech, Liege University, Gembloux, Belgium. Supervision Division, Taizhou Customs of the People's Republic of China, Taizhou, China" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "Semiochemical use is a promising way to reduce damage from pests by improving natural control in agro-ecosystems. The aphid alarm pheromone (E)-beta-farnesene (EbetaF) and herbivore-induced methyl salicylate (MeSA) are two volatile cues to induce changes in aphid behavior with functional significance. Because of limitations related to the volatility and oxidization of EbetaF and MeSA under natural conditions, slow-release and antioxidant techniques should be developed and optimized before application. Here, a slow-release alginate bead of EbetaF mixed with MeSA was first designed and manufactured. We hypothesized that a mixture of these two semiochemicals could be effective in controlling Sitobion miscanthi in wheat crops. Both MeSA and EbetaF in alginate beads were released stably and continuously for at least 15 days in the laboratory, whereas EbetaF in paraffin oil and pure MeSA were released for only 2 and 7 days, respectively. In 2018 field experiments, EbetaF and MeSA alone or in association significantly decreased the abundance of alate and apterous aphids. An increased abundance of mummified aphids enhanced by higher parasitism rates was observed when using EbetaF and MeSA in association, with a significant reduction of apterous abundance, more so than EbetaF or MeSA alone. In 2019, plots treated with a mixture of EbetaF and MeSA showed significantly decreased abundance of alate and apterous aphids with higher parasitism rates compared with the control. The new slow-release alginate bead containing a mixture of EbetaF with MeSA could be the most efficient formulation to control S. miscanthi population by attracting parasitoids in the wheat agro-ecosystem. (c) 2021 Society of Chemical Industry. (c) 2021 Society of Chemical Industry" |
| Keywords: | Animals *Aphids Ecosystem Pheromones/pharmacology Salicylates Sesquiterpenes Triticum Triticum aestivum behavioral manipulation biological control ecological service semiochemical release wheat aphid; |
| Notes: | "MedlineLiu, Jiahui Zhao, Xiaojing Zhan, Yidi Wang, Kang Francis, Frederic Liu, Yong eng Review England 2021/03/28 Pest Manag Sci. 2021 Jul; 77(7):3341-3348. doi: 10.1002/ps.6378. Epub 2021 Apr 25" |
