Verticillium wilt

(Verticillium spp.)

A fungal wilt disease associated with elongated patches of dead bark at the seat of the infection, which cracks and exudes gum. In cross-section the wood is usually discoloured in blotches which follow the current annual ring. The disease is common in tree nurseries, hence in newly planted trees, which it may kill.

This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
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