Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK.
J Insect Physiol. 2012 May;58(5):660-8. doi: 10.1016/j.jinsphys.2012.01.017. Epub 2012 Feb 13.
The probing and larviposition behaviour of the bird cherry-oat aphid, Rhopalosiphum padi on summer and winter host plants were investigated using electrical penetration graph (EPG) coupled with simultaneous video recording. In this way the precise probing history prior to parturition can be monitored and the location of possible reproductive stimulants identified. On the host plant, all gynoparae (autumn winged females that give birth to sexual females on bird cherry, Prunus padus, the primary host) and 55% of winged virginoparae (summer females which produce further virginoparae on barley, Hordeum vulgare, a secondary host) initiated larviposition before phloem contact. However, 90% of wingless virginoparae (on barley) contacted the phloem before first larviposition whilst 10% did not. Thus, phloem contact does not appear to be a pre-requisite for these aphid forms to initiate reproduction.
用电穿孔图（EPG）结合同步视频记录研究了鸟樱麦蚜在夏季和冬季寄主植物上的探查和产卵行为。通过这种方式，可以监测到分娩前的精确探查史，并确定可能的生殖刺激物的位置。在寄主植物上，所有的雌产雌蚜（秋季有翼雌蚜，在鸟樱李属上生育有性雌蚜，是主要寄主）和 55%的有翼处女蚜（夏季雌蚜，在大麦上产生更多的处女蚜，是次要寄主）在接触韧皮部之前开始产卵。然而，90%的无翅处女蚜（在大麦上）在第一次产卵之前接触韧皮部，而 10%的则没有。因此，韧皮部接触似乎不是这些蚜虫形式开始繁殖的先决条件。
