Rothamsted Experimental Station, AL5 2JQ, Harpenden, UK.
J Chem Ecol. 1982 Nov;8(11):1377-88. doi: 10.1007/BF01403101.
1,4-Cycloaddition reactions between (E)-β-farnesene (the aphid alarm pheromone) and dienophiles, such as SO2 and RO·CO·C ≡ CCO·OR, gave products more stable and less volatile than the parent compound. In laboratory experiments, the numbers ofMyzus persicae (Sulz.) settling and nymphs deposited on plants were decreased by some of the reaction products. Acquisition, and thereby transmission, of the semipersistent beet yellows virus and the nonpersistent potato virus Y, was decreased.
(E)-β-法呢烯（蚜虫报警信息素）与亲双烯体（如 SO2 和 RO·CO·C≡CCO·OR）之间的 1,4-环加成反应产生的产物比母体化合物更稳定、挥发性更低。在实验室实验中，一些反应产物降低了桃蚜（Myzus persicae（Sulz.））的定居和若虫数量。同时，半持久型黄化病毒和非持久型马铃薯 Y 病毒的获得和传播也有所减少。
