Rhododendron canescens Fine Webbing - Causes & Fixes

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Spider Mites (Tetranychidae)

Spider mites thrive in the warm, dry conditions often experienced by Oakleaf Azaleas. They pierce individual leaf cells to suck out contents, leaving behind fine silken webs and stippled white or yellow spots on the foliage.

Very Common

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How to confirm: Hold a white piece of paper underneath a leaf and tap it sharply to see if tiny crawling dots fall off.

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1 Apply an organic miticide or insecticide to the foliage to eliminate existing spider mite populations and destroy eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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2 Increase humidity around the plant and ensure the soil remains consistently moist, as spider mites thrive in dry environments.

Flora Premium Plant Mister

Spray Bottles

$12

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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 plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

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Spider Mites (Two-Spotted Spider Mite)

This specific species is highly common on woody shrubs like Rhododendron canescens. The webbing becomes more dense and visible on the undersides of leaves during periods of heat stress.

Very Common

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How to confirm: Inspect the undersides of the leaves specifically for small, dark spots within the silk webbing.

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shopping_cart Recommended Products

1 Apply an organic insecticide/miticide spray to the plant, ensuring you thoroughly coat the undersides of the leaves where the webbing is most dense.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase humidity around the plant and avoid high heat, as spider mites thrive in hot, dry conditions.

Flora Premium Plant Mister

Spray Bottles

$12

In Stock

3 Monitor soil moisture levels to ensure the plant is not experiencing heat stress, which can trigger mite infestations.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Fall Webworm (Macaria depressa)

While more common in late summer, these caterpillars spin large, dense silk webs that can envelop entire branch tips of azaleas to protect themselves while feeding on the leaves.

Common

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How to confirm: Look for larger, thicker clumps of webbing and check for caterpillars inside the silk structures.

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shopping_cart Recommended Products

1 Manually remove and destroy the silk webs and caterpillars from the affected branches to prevent further defoliation.

2 Apply an organic insecticide spray to the plant to target any remaining larvae and prevent a new infestation.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 For acid-loving plants like Rhododendrons, ensure the soil remains nutrient-rich to help the plant recover from feeding damage.