Rhododendron flammeum Fine Webbing - Causes & Fixes

search Possible Causes

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Spider Mites (Tetranychidae)

The fine webbing is a hallmark sign of spider mite infestations, which thrive in the warm, dry conditions often experienced by Rhododendrons. These arachnids pierce plant cells to feed on sap, leading to stippling and eventual leaf drop.

Very Common

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How to confirm: Hold a white piece of paper under a leaf and tap it to see if tiny moving dots fall onto the paper.

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shopping_cart Recommended Products

1 Apply an organic miticide or insecticide to eliminate existing spider mites, eggs, and larvae on the plant foliage.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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 leaves to reduce the mite population and prevent further spread.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

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Cheesemite (Adelgids)

While less known for heavy webbing than spider mites, certain Adelgid species can create silk-like structures or produce honeydew that attracts secondary pests. This often presents as waxy, white accumulations on the undersides of Rhododendron leaves.

Common

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How to confirm: Inspect the leaf undersides for small, white, waxy insect scales or bumps near the veins.

build How to fix it

shopping_cart Recommended Products

1 Inspect the undersides of leaves for waxy, white accumulations and spray the plant thoroughly with an organic insecticide to eliminate the Adelgids.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Prune and dispose of heavily infested or damaged foliage to prevent the spread of pests and secondary webbing to healthy parts of the plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

3 Apply a specialized fertilizer for acid-loving plants to help the Rhododendron recover and strengthen its immune response.

FoxFarm Happy Frog Acid Loving Plant Fertilizer

Organic

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Thrips Infestation

Thrips do not produce webbing themselves, but their feeding damage can cause plants to produce extra silk or attract secondary mites that create visible webs. Damage typically appears as silvered streaks on the Flame Rhododendron foliage.

Common

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How to confirm: Look for tiny, slender black or yellow insects moving rapidly along the leaf margins.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to eliminate the thrips and any secondary mites causing the webbing.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Inspect the undersides of leaves for silvered streaks and remove heavily infested foliage to prevent further spread.

3 Use yellow sticky traps to monitor and capture adult thrips flying around the plant.