What are these black insects on my Rudbeckia (photos)
Does anyone know what these black insects are on my Rudbeckia?
I spray the plants and that's keeps the white aphids at bay. These insects in the photo seem to just keep coming. It is the same every year.
If anyone knows what they are, what is an effective way to eradicate. I even tried loads of soap suds last year, which helped, but very time-consuming applying by hand from a bucket. I find that a sprayer is not good at applying suds.
Last edited: 20 June 2017 12:30:08