| Title: | A push-pull strategy for controlling the tea green leafhopper (Empoasca flavescens F.) using semiochemicals from Tagetes erecta and Flemingia macrophylla |
| Author(s): | Niu Y; Han S; Wu Z; Pan C; Wang M; Tang Y; Zhang QH; Tan G; Han B; |
| Address: | "Anhui Province Key Laboratory of Integrated Pest Management on Crops, College of Plant Protection, Anhui Agricultural University, Hefei, China. Zhejiang Provincial Key Laboratory of Biometrology and Inspection and Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, China. Sterling International, Inc., Spokane, WA, USA" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: The tea green leafhopper, Empoasca flavescens is the most important pest in Chinese tea plantations. For decades its control has been executed almost exclusively through pesticide applications. A semiochemical-based 'push-pull' strategy was tested on the leafhopper in the study. RESULTS: The odors released from Tagetes erecta and Flemingia macrophylla significantly repelled and attracted leafhoppers, respectively. These volatile compounds (46 from T. erecta and 53 F. macrophylla) were identified and quantified via gas chromatography-mass spectometry (GC-MS) analysis. Y-tube olfactometer assays indicated that thymol anisole, thymol and camphor had significant repellent effects on the leafhoppers, resulting in a ternary repellent blend at a 4:3:13 ratio. Cis-3-hexen-1-ol, cis-3-hexenyl acetate, nonanal and alpha-farnesene were significantly attractive to the leafhoppers, making an attractant blend at a 17:4:1:1 ratio. In the field, the push-pull strategy with the repellent dispensers placed within the tea bushes and the attractant-baited sticky traps hung 15 cm above the tea plants showed a significant control efficacy, reaching 69% and 55% at two and 14 days post-treatment, respectively, similar to those in the insecticide control plots. Additionally, the leafhopper density in the push-pull intercropping plot was 63.2 leafhoppers/100 tea shoots/visit, much lower than those in the pull intercropping plot and nonintercropping plot. CONCLUSION: Application of the push-pull strategy using both synthetic repellent and attractant, or intercropping T. erecta and F. macrophylla with tea plants, can effectively reduce the leafhopper population. This approach might have great potential as an environmentally safe control strategy against the leafhopper. (c) 2022 Society of Chemical Industry" |
| Keywords: | Animals *Camellia sinensis *Fabaceae *Hemiptera *Insect Repellents/pharmacology Pheromones *Tagetes Tea Thymol Empoasca flavescens Flemingia macrophylla Tagetes erecta push-pull semiochemicals; |
| Notes: | "MedlineNiu, Yuqun Han, Shanjie Wu, Zihui Pan, Cheng Wang, Mengxin Tang, Yanyan Zhang, Qing-He Tan, Genjia Han, Baoyu eng National Key Research and Development Program of China (Grant No. 2018YFC1604402 and 2019YFD1002100)/ Special program of scientific and technological innovation for students of China Jiliang University (2019YW18)/ Team Scientific Special Commissioner Project of Zhejiang Provincial Department of Science and Technology (2020.1-2024.12, SY-1)/ the National Natural Science Foundation of China (Grant No. 32072626 and 32001910)/ the Zhejiang Provincial Fundamental and Public Welfare of China (Grant No. LGN20C140005)/ the Zhejiang Provincial Key Research and Development Program of China (Grant No. 2020C02026)/ England 2022/02/19 Pest Manag Sci. 2022 Jun; 78(6):2161-2172. doi: 10.1002/ps.6840. Epub 2022 Mar 12" |
