Diseased conifer

Robin3

I have five corkscrew shaped conifers, all in various places in my garden. All of them to a degree have dry dead patches from the middle to the top. Can any body suggest what is wrong?

Alina W

They may have conifer aphid. Since there is no issue with flowers, you could try spraying with a systemic insecticide to stop the brown spreading.

Brown areas will not green up again, so you will need to cut them out and train fresh growth into the area.