Disease killing plants

Asked May 2, 2020, 11:58 AM EDT

Can you tell me what disease this is on my lilac bush? It is also on the barberry bushes and a few trees further from house. The lilac is dying along with the barberry but the tree is not noticeably effected. Fungus-Mold?

Cook County Illinois

1 Response

Hello, From the pictures, it appears that your plants are suffering from an insect infestation, but I can not rule out a fungus infestation. I have a few questions: 1) what was the health of the plants and trees last year? 2) how old are the plants? 3) is there a white coating on the leaves? Thank you!