DiseaseHigh Severity

Palm Bud Rot

Penicillium vermoeseni

A fungal disease affecting palm trees, particularly problematic in coastal areas with cool, foggy weather. The disease causes terminal bud death and leafstalk base rot, eventually leading to tree mortality if infection becomes established in the crown whorl.

Peak Season: Disease development: Favored by cool, foggy weather conditionsInfection period: Year-round once established in crownPeak susceptibility: During periods of high humidity and cool temperaturesSpread potential: Continuous under favorable environmental conditions
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Palm bud rot showing terminal bud death and crown decay symptoms

Identification & Symptoms

What to Look For

Dying of terminal buds
Rotting of leafstalk bases
Progressive decline of new growth
Crown whorl infection spreading throughout
Eventual tree death if untreated
Blackening and decay of central growing point

Potential Damage

Terminal bud mortality ending vertical growth
Progressive decay of leafstalk bases
Complete tree mortality once infection is established
Economic losses in palm plantings and landscapes
Rapid spread to nearby palms
Loss of landscape and aesthetic value

Lifecycle

Infection occurs through conidiospores moving throughout crown whorls until all leafstalks are infected. Once infection becomes established, it continues year-round. Inoculum can spread rapidly to nearby palms under favorable conditions.

Professional Treatment Approach

1

Fungisol applications for crown and bud protection

2

Early intervention before infection becomes established

3

Improve air circulation around palm crowns

4

Avoid overhead irrigation that increases humidity

5

Remove and destroy infected plant material

Recommended Mauget Products

Fungisol

Professional-grade treatment specifically effective against palm bud rot.

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