Phytophthora root rot
After honey fungus, Phytophthora root rot is the most common cause of root and stem base decay of a wide range of trees and shrubs. There are a number of different Phytophthora species, all causing very similar symptoms. Herbaceous perennials, bedding plants, pot plants and even bulbs can be affected, in addition to woody plants.

© The Royal Horticultural Society 2011 / RHS Registered Charity № 222879/SC038262
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