Arborvitae tree limbs dieing

Asked June 4, 2018, 10:18 PM EDT

Hi. My Arborvitae trees some of the limbs are Browning and dieing and I noticed Knott type round growths just prior to where the limbs are dieing.

1 Response

Sorry for the delay in answering this, I needed to consult with some of my colleagues. This is likely tip blight. You could submit a sample to your local county extension office for verifications. The usual practice is to prune away branches that are dying or exhibit the twig swelling areas shown in your photo.