Verticillium Wilt
Verticillium albo-atrum, V. dahliae (fungus)
A soil-borne fungal disease affecting a wide range of tree species. The fungus invades the vascular system, causing wilt symptoms that can range from sudden collapse to chronic decline. Disease can be acute with rapid death or chronic with slow dieback over multiple seasons.
Identification & Symptoms
What to Look For
Potential Damage
Lifecycle
Fungus is active at all times but most active in warm, dry soils. Overwinters in soil as sclerotia which germinate with spring moisture to invade fine rootlets. Once inside roots, moves through vascular system to plant crown, destroying vascular elements. Can be transmitted through soil, infected pruning tools, or by nematodes. Vehicle tires may spread pathogen from infested to non-infested soil.
Professional Treatment Approach
Improve soil moisture and avoid drought stress
Apply high nitrogen fertilizers like ammonium sulfate
Avoid planting susceptible species in infested soil
Sterilize pruning tools between trees
Professional assessment for systemic fungicide options
Remove severely affected trees to reduce soil inoculum
Recommended Mauget Products
Fungisol
Professional-grade treatment specifically effective against verticillium wilt.
View Product DetailsProfessional soil fungicide treatments
Professional-grade treatment specifically effective against verticillium wilt.
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