I have been keeping my eye on this tansy plant in my garden for some time. It began with a few insects on the stalk, now there are almost more insects than stalk and the stalk no longer has a lot of room left.
At the beginning I would give it a shower daily and that would almost sweep the insects away. However, since we have had our rainy days, giving more water was not a good idea and so the insects have multiplied. Today I took a zoomy photo of the cluster which looked most strange. I wonder what they are? Perhaps something from another world, who knows. If my blogging colleague Tony might be reading this, he would definitely know what they are.