Your website states that box elder bugs do not harm plants. For years, after...
Your website states that box elder bugs do not harm plants. For years, after living in Prior Lake and Bloomington, I am battling box elder bugs that kill one of my favorite plants. I have seen it called Heliopsis Helianthoides, False Sunflower Sunstruck and Oxye Lorraine Sunshine. The box elder bug eggs cover literally every inch of every branch/stem of the plant and unless I notice and spray them soon enough, the plant dies every time! I just noticed this morning that it was happening again. The plant is starting to die. I took a picture for you - since I sprayed this morning, the bugs have fallen off the stems/branches and are laying on the leaves. Thought you might want to mention on your website that box elder bugs can kill a plant. This is the only plant I've had that this happen to. Bobbi
Hennepin County Minnesota
Thank you for the question. The insects in the photo appear to be aphids and they can cause damage or even death of a plant. See photos of them and read to learn more here: http://www.extension.umn.edu/garden/insects/find/aphids-in-home-gardens/
See boxelder bugs and read about them here: http://www.extension.umn.edu/garden/insects/find/boxelder-bugs/
I think the nymph stage of the boxelder bug could be confused with the red/brown aphids. Check out your insect pest closely.
Thank you for contacting Extension.