Pope T W, Campbell C A M, Hardie J, Wadhams L J
East Malling Research, New Road, East Malling, Kent, ME19 6BJ, UK.
Bull Entomol Res. 2007 Jun;97(3):317-9. doi: 10.1017/S0007485307004932.
Hop plants were sprayed with (Z)-jasmone, at a rate of 50 g ha(-1), during the spring migration of the damson-hop aphid Phorodon humuli (Schrank) in 2002 and 2003. Numbers of P. humuli spring migrants colonizing hop plants, Humulus lupulus L., 2-6 and 7-11 days after applying this treatment were assessed in both years. During the first five-day period, significantly more spring migrants were found on hop plants treated with (Z)-jasmone, in comparison with control plants, in 2002. By contrast, no significant difference was evident in the second five-day period. Although the migration in 2003 was much lighter than in 2002, greater numbers of migrants were again removed from treated plants. Indeed, more spring migrants were removed from plants sprayed with (Z)-jasmone in this year during both five-day periods (11 and 44%, respectively) compared with the 23% greater numbers removed in the first five-day period in 2002. Therefore, unlike some other species of aphid, where numbers were consistently lower on plots sprayed with (Z)-jasmone, spraying the secondary host of P. humuli with this compound appears to increase colonization by spring migrants.
在2002年和2003年欧洲越橘-啤酒花蚜（Phorodon humuli (Schrank)）春季迁飞期间，以50克/公顷的用量用（Z）-茉莉酮对啤酒花植株进行喷雾处理。在这两年中，均对施用该处理后2至6天以及7至11天在啤酒花植株（Humulus lupulus L.）上定殖的欧洲越橘-啤酒花蚜春季迁飞蚜数量进行了评估。在2002年的第一个五天期间，与对照植株相比，在经（Z）-茉莉酮处理的啤酒花植株上发现的春季迁飞蚜明显更多。相比之下，在第二个五天期间没有明显差异。尽管2003年的迁飞情况比2002年轻得多，但从处理过的植株上迁走的蚜虫数量仍然更多。实际上，与2002年第一个五天期间多迁走23%相比，在今年的两个五天期间，从喷施（Z）-茉莉酮的植株上迁走的春季迁飞蚜数量更多（分别为11%和44%）。因此，与一些其他蚜虫种类不同，在喷施（Z）-茉莉酮的地块上蚜虫数量一直较少，而用这种化合物喷施欧洲越橘-啤酒花蚜的第二寄主似乎会增加春季迁飞蚜的定殖。
