Need Help with Browning Aucuba Shrub

Asked July 3, 2020, 5:15 PM EDT

The leaves on my daughter and son-in-law's aucuba keep turning brown. I've been removing them, got rid of the dead leaves that had collected underneath and added some wood chips away from the base. None of that seems to be helping though.

Prince George's County Maryland

1 Response

The wilting of stems and brown/black spots on the foliage are symptoms of a disease called Phomopsis stem dieback. This can cause blacking stems and shoot dieback on Acubas.

Prune out the affected stems, cutting down below where you see healthy growth about 6-8 inches back into healthy tissue. Rake any fallen leaves and dispose of. Check the soil drainage in the area and make sure the soil drains well.
No chemical controls are recommended.
Here is some information on Aucuba from Clemson