Pest identification
What's eating my mexican fan palm?
Scale insects
Signs: White or brown encrusted bumps on frond bases; frond yellowing and reduced vigor.
Control: Spray horticultural oil; use systemic soil drench with imidacloprid for tall palms where spraying is impractical.
Palm leaf skeletonizer (Homaledra sabalella)
Signs: Webbing and brown papery skeletonized leaflets; caterpillars feed beneath protective webbing.
Control: Apply Bacillus thuringiensis (Bt) spray or spinosad to affected fronds; remove and bag heavily infested fronds.
Red palm weevil (Rhynchophorus ferrugineus)
Signs: Larval boring in the crown causes internal rot; fronds collapse inward and the palm may die.
Control: Use pheromone traps; inject systemic insecticide into the trunk if detected early; remove and destroy severely infested palms.
Keep mexican fan palm pest-free
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Mexican Fan Palm pests — FAQ
What is eating my mexican fan palm?
Mexican Fan Palm (Washingtonia robusta) is a tall outdoor palm whose most common pests are scale insects and the palm leaf skeletonizer caterpillar (Homaledra sabalella), which webs and devours leaflets. Aphids and the red palm weevil (Rhynchophorus ferrugineus) are serious threats in infested regions. Scale is the most frequently encountered problem.
How do I get rid of scale insects on mexican fan palm?
White or brown encrusted bumps on frond bases; frond yellowing and reduced vigor. Spray horticultural oil; use systemic soil drench with imidacloprid for tall palms where spraying is impractical.
How do I get rid of palm leaf skeletonizer (homaledra sabalella) on mexican fan palm?
Webbing and brown papery skeletonized leaflets; caterpillars feed beneath protective webbing. Apply Bacillus thuringiensis (Bt) spray or spinosad to affected fronds; remove and bag heavily infested fronds.
How do I get rid of red palm weevil (rhynchophorus ferrugineus) on mexican fan palm?
Larval boring in the crown causes internal rot; fronds collapse inward and the palm may die. Use pheromone traps; inject systemic insecticide into the trunk if detected early; remove and destroy severely infested palms.