| Title: | Slow Release of Plant Volatiles Using Sol-Gel Dispensers |
| Author(s): | Bian L; Sun XL; Cai XM; Chen ZM; |
| Address: | "Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, 9 MeiLing South Road, Xihu District, Hangzhou 310008, China. Ministry of Agriculture Key Laboratory for Pesticide Residue Detection, Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, 9 MeiLing South Road, Xihu District, Hangzhou 310008, China. zmchen2006@163.com" |
| ISSN/ISBN: | 0022-0493 (Print) 0022-0493 (Linking) |
| Abstract: | "The black citrus aphid, also known as the tea aphid, (Toxoptera aurantii Boyer) attacks economically important crops, including tea (Camellia sinensis (L.) O. Kuntze). In the current study, silica sol-gel formulations were screened to find one that could carry and release C. sinensis plant volatiles to lure black citrus aphids in a greenhouse. The common plant volatile trans-2-hexen-1-al was used as a model molecule to screen for suitable sol-gel formulations. A zNose (Electronic Sensor Technology, Newbury Park, CA) transportable gas chromatograph was used to continuously monitor the volatile emissions. A sol-gel formulation containing tetramethyl orthosilicate and methyltrimethoxysilane in an 8:2 (vol:vol) ratio was selected to develop a slow-release dispenser. The half-life of trans-2-hexen-1-al in the sol-gel dispenser increased slightly with the volume of this compound in the dispenser. Ten different volatiles were tested in the sol-gel dispenser. Alcohols of 6-10 carbons had the longest half-lives (3.01-3.77 d), while esters of 6-12 carbons had the shortest (1.53-2.28 d). Release of these volatiles from the dispensers could not be detected by the zNose after 16 d (cis-3-hexenyl acetate) to 26 d (3,7-dimethylocta-1,6-dien-3-ol). In greenhouse experiments, trans-2-hexen-1-al and cis-3-hexen-1-ol released from the sol-gel dispensers attracted aphids for asymptotically equal to17 d, and release of these volatiles could not be detected by the zNose after asymptotically equal to24 d. The sol-gel dispensers performed adequately for the slow release of plant volatiles to trap aphids in the greenhouse" |
| Keywords: | Acyclic Monoterpenes Aldehydes Animals *Aphids Camellia sinensis/*chemistry Hexanols Insect Control/*methods Monoterpenes Volatile Organic Compounds/*administration & dosage Aphididae plant volatile slow release sol-gel zNose; |
| Notes: | "MedlineBian, L Sun, X L Cai, X M Chen, Z M eng Evaluation Study England 2015/10/16 J Econ Entomol. 2014 Dec; 107(6):2023-9. doi: 10.1603/EC14054" |
