Acer rubrum Fine Webbing - Causes & Fixes

Jump to cause: Two-Spotted Spider Mite Infestation Spider Mite Mites (Tetranychus urticae) Fall Webworm

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Two-Spotted Spider Mite Infestation

These arachnids thrive in hot, dry conditions and feed on the undersides of Acer rubrum leaves, injecting saliva that destroys plant cells. The fine webbing is a characteristic protective structure used by the mites to move and lay eggs.

Very Common

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How to confirm: Hold a white piece of paper underneath a leaf and tap the leaf sharply to see if tiny crawling specks fall onto the paper.

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1 Apply an organic insecticide/miticide spray to the plant, ensuring you thoroughly coat the undersides of the leaves where mites reside.

Bonide Captain Jack's Neem Oil 32 oz

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2 Increase local humidity around the maple to make the environment less hospitable for spider mites, as they thrive in hot, dry conditions.

Flora Premium Plant Mister

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3 Gently prune and dispose of heavily infested or dead foliage to reduce the mite population and prevent further spread.

Fiskars 5/8" Bypass Pruning Shears

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Spider Mite Mites (Tetranychus urticae)

A specific subset of spider mites that can cause much denser webbing and more severe stippling (small yellow dots) on the red maple foliage. This often occurs during periods of drought stress when the tree's natural defenses are lowered.

Very Common

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How to confirm: Inspect the leaf undersides for tiny, moving dark or light-colored dots alongside the silk threads.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic miticide or insecticide to eliminate the spider mite population and destroy any remaining eggs or larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase humidity and ensure consistent soil moisture to reduce drought stress, which makes the tree more susceptible to mite infestations.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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3 Prune and dispose of heavily infested or dead foliage to prevent the mites from spreading to healthy parts of the tree.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

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Fall Webworm

While primarily known for larger, more dense silk nests in autumn, early instar larvae can create finer silken structures around leaf clusters. These caterpillars consume the foliage of Acer species, leaving behind skeletonized leaves.

Common

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How to confirm: Look for small, caterpillar-like larvae moving within the webbed areas or feeding on the leaf edges.

build How to fix it

shopping_cart Recommended Products

1 Manually remove any visible silken webs and caterpillars from the tree branches to reduce the immediate population.

2 Apply an organic insecticide spray to the foliage to target remaining larvae and prevent further feeding.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Monitor the tree closely for new webbing and use a targeted spray if the infestation persists.