DiseaseHigh Severity

Fusarium Wilt (Mimosa Wilt)

Fusarium oxysporum f.sp. perniciosum

A common and lethal vascular wilt disease of mimosa (Albizia julibrissin), also known as Persian silktree. The soil-borne fungus colonizes and clogs the tree's vascular tissue, interfering with water and nutrient movement and resulting in relatively rapid tree death.

Peak Season: Symptoms appear early to mid-summer, progressive through fall
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Fusarium wilt symptoms showing characteristic yellowing and wilting

Identification & Symptoms

What to Look For

Brown streaking in wood beneath bark and/or roots (early, often unnoticed)
Yellowed, stunted, and wilted leaves on one or several branches in early to mid-summer
Premature defoliation of affected branches later in summer
Progressive yellowing and wilting spreading to more branches
Streaks of discoloration in sapwood (very characteristic)
Discolored ring of sapwood visible in cross-section
Bark cracks with possible gum or white frothy liquid exudation
Fermented odor from exuding liquid

Potential Damage

Colonizes and clogs vascular (water-conducting) tissue
Interferes with water and nutrient movement
Relatively rapid tree death (can occur within a month)
Some trees may survive to next season but continue declining
Root systems may survive and produce shoots after top death
Results in clogged and defective vascular system

Lifecycle

Fungus survives long-term as chlamydospores in soil. Root exudates stimulate chlamydospore germination, producing mycelium that penetrates and colonizes roots. Microcondia move upward with sap, depositing throughout vascular system causing systemic colonization and eventual clogging.

Professional Treatment Approach

1

No effective treatment once infection is established

2

Plant resistant species in infested areas

3

Avoid planting mimosa in areas with known infection

4

Remove infected trees completely including root system

5

Prevent spread through contaminated soil and equipment

6

Disinfect tools and equipment between sites

Recommended Mauget Products

No effective chemical treatment available

Professional-grade treatment specifically effective against fusarium wilt (mimosa wilt).

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