Diseases of Shrubs & Trees

Commonly-affected plants:        Viburnum ‘Awabuki’, Viburnum suspensumDowny Mildew of Viburnum, caused by the fungus Plasmopara viburni, is a common foliar disease of viburnum. This fungus requires cooler temperatures and high humidity and/or rainfall or…

Mushroom Root Rot is a common disease of many trees and shrubs caused by the fungus Armillaria spp. This fungus spreads through root-to-root contact of infected and healthy plants, as well as…