Hemiptera: Aphididae - aphid Macrosiphoniella millefolii Yarrow aphid On Achillea millefolium, Yarrow Hosts: Usually found on Achillea millefolium but can also occur on other Achillea spp. and on Anthemis arvensis, Leucanthemum vulgare, Tanacetum parthenium, T. vulgare, Tripleurospermum spp.

Macrosiphoniella millefolii, Yarrow aphid
Kingston Lacy, Dorset. October 2018