high severity

Mango Malformation DiseaseIdentification & Treatment Guide 2026

Fusarium mangiferae · Family: Nectriaceae

Mango malformation (Fusarium mangiferae) causes thickened, distorted flower panicles and bunchy vegetative shoots, preventing fruit production. The disease is spread by eriophyid mites. Manage by pruning malformed panicles 15-20 cm below the affected area, applying naphthalene acetic acid spray, controlling mites with sulfur, and maintaining tree vigor with balanced nutrition.

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Quick Diagnosis

high

Mango Malformation Disease

Affects: flowersinflorescencesvegetative shoots
Peak Season: Flowering season (December-March in Northern Hemisphere); vegetative malformation visible year-round
Spread Risk: Slow
Spread By: Eriophyid mites (Aceria mangiferae), infected nursery stock, possibly airborne conidia

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Symptoms: What does Mango Malformation Disease look like?

Visual identification guide — tap each stage for details

Abnormally compact mango flower bud showing early malformation — Unusually compact and stout emerging flower panicle

Severely distorted thickened mango flower panicle — Grotesquely malformed panicle — thickened, shortened, sterile

Bunchy rosette vegetative malformation on mango shoot tip — Vegetative malformation with bunchy, rosette-like shoot tips

Early Stage

Abnormally compact flower buds
Emerging flower panicles appear more compact and stout than normal. Buds are crowded together with shorter-than-normal rachis branches.

Mid Stage

Severely distorted malformed panicles
Panicles are grotesquely thickened, shortened, and crowded. Individual flowers are larger than normal but sterile. The overall panicle looks like a compact, green cauliflower-like mass. No fruit sets.

Late Stage

Bunchy top vegetative growth
Vegetative shoots develop a bunchy, rosette-like growth with shortened internodes and small, thickened leaves clustered at the tip. Severely affected trees can have 50-80% of panicles malformed.

Causes: Why is my plant getting Mango Malformation Disease?

Environmental triggers and disease cycle

Fusarium mangiferae colonization of apical meristems
Eriophyid mite (Aceria mangiferae) movement between trees vectoring Fusarium
Infected nursery stock propagated from malformed mother trees
Warm winter temperatures promoting mite activity during bud break

Disease Lifecycle

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Host Plant

Susceptible crop

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Pathogen

Fusarium

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Conditions

Flowering season (December-March in Northern Hemisphere); vegetative malformation visible year-round

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Infection

Penetrates tissue

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Symptoms

Visible signs

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Spread

Eriophyid mites (Aceria mangiferae)

Often confused with: Mango Anthracnose. See our comparison guide.

How to Treat Mango Malformation Disease

Tick each step as you complete it — works offline too

🌿 OrganicSafe for all farms

Organic Treatment Steps

4 steps

Prune all malformed panicles and vegetative shoots, cutting 15-20 cm below the affected area. Burn all pruned material immediately.
Apply wettable sulfur (3 g/L) or lime-sulfur spray to control eriophyid mites during pre-flowering flush.
Spray naphthalene acetic acid (NAA) at 200 ppm in early October (pre-flowering) to debloss severely affected trees, allowing them to recover vegetatively.
Maintain balanced nutrition with emphasis on potassium and micronutrients to promote tree vigor.

🧪 ChemicalUse protective equipment

Chemical Treatment Steps

4 steps

Spray dicofol (Kelthane 18.5EC) at 2 ml/L targeting eriophyid mites during pre-flowering flush.
Apply carbendazim (Bavistin 50WP) at 1 g/L + mancozeb at 2.5 g/L as protective spray during flower emergence.
Inject affected trees with phosphorous acid at 20% concentration in the trunk for systemic antifungal effect.
Apply difenoconazole (Score 25EC) at 0.5 ml/L at panicle emergence to protect developing inflorescences.

Prevention & Seasonal Calendar

Year-round protection plan for your crops

Pre-Planting

Source nursery stock only from certified malformation-free mother trees
Inspect new plants carefully before planting — reject any with bunchy growth

Mid-Season

Remove all malformed panicles within 2 weeks of appearance — do not leave them on the tree
Maintain regular pruning to promote open canopy and vigorous growth

Post-Harvest

Control eriophyid mites with sulfur sprays during pre-flowering period
Avoid excessive nitrogen that promotes lush susceptible growth

🛡️ Resistant Varieties

Neelum (tolerant)Baneshan (tolerant)Sensation (resistant)

View full seasonal calendar for your region →

Frequently Asked Questions

Common questions about Mango Malformation Disease

Will pruning malformed panicles cure the tree?

Pruning helps manage the disease but does not cure it. The Fusarium fungus colonizes internal tissues and can re-infect new growth. However, consistent pruning of malformed parts combined with mite control can progressively reduce disease severity over seasons and allow some normal flowering.

Is mango malformation disease contagious?

Yes, it spreads between trees via eriophyid mites carrying Fusarium. Mites are tiny (0.2 mm) and can be blown by wind to nearby trees. Infested nursery stock is the primary means of long-distance spread.

Can I eat fruit from a tree with malformation disease?

The disease affects flower panicles, preventing fruit formation. If a tree does produce some normal fruit on unaffected branches, that fruit is completely safe to eat. The fungus does not produce any toxins in the fruit.

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Related Disease

Mango Anthracnose

Colletotrichum gloeosporioides

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Affected Plant

Mango

Mangifera indica

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Treatment Guide

Full Treatment Protocol

Detailed spray schedule & dosage guide

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