Asked November 06, 2024, 11:58 AM EST
Hi,
I was pruning my dahlias and noticed one had a stem with lots of galls in it (the stem had died, probably from chilly nights). This doesn't look like crown or leafy gall and I suspect an insect did this. I cut into the galls and it looks like plant tissue with no visible larvae, however, there are some holes that may indicate whatever grew in the gall has now escaped. None of my other dahlias had this and my other plants look fine.
My dahlias are in growbags in full sun in a bed with other flowering plants. I haven't dug the tubers yet, so I'm unsure if they were affected by this as well. Do you know what species caused this issue?
Baltimore County Maryland