Horrid little aphids have taken a shine to my achillea. Fortunately they do not seem to be causing too much harm but I must be very cautious because the long term damage is yet to be seen. Of course, I have treated the plants (along with the rest of the garden specimens) with neem oil/ soap drench. The aphid colonies are certainly diminished in size (my best guess is by about 80%) but a second treatment in about 7 days time is certainly called for. Environmental factors can be so frustrating!
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