I have always had yarrow in my gardens no matter where I have lived. When we moved here five summers ago it was the first thing I planted in my garden.
This summer I noticed that this one particular variety (cannot recall the name at the moment) was not coming in thick as usual and the ends were turning brown and dying. When I got down close and inspected I noticed the bugs....black and yellow mostly. Some with red bellies. They are about a third of an inch long. I have never had this problem before.
I have sprayed with a rose and flowering plant insect spray but I really hate doing this because I hate to think of what it will do to the toads in my garden. I have started pulling some of the small offshoots but was just wondering if anyone else has noticed this problem or knows of this problem and knows of a better way to handle it.