Rhododendron hippophaeoides Fine Webbing - Causes & Fixes

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Spider Mites (Tetranychidae)

The presence of fine webbing is a classic sign of spider mite infestation, which thrives in the warm, dry conditions often experienced by Rhododendrons. These microscopic arachnids pierce cell walls to feed on the 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 sharply to see if tiny moving specks fall off.

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1 Apply an organic insecticide/miticide spray to the plant to eliminate existing spider mites and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

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

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

Fiskars 5/8" Bypass Pruning Shears

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Edermacyella (Gall Mites)

Certain species of eriophyid mites produce much finer, almost invisible webbing or silken structures on the leaf surfaces and buds. These mites can cause localized distortions or small galls on the foliage of Rhododendron species.

Common

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How to confirm: Examine the leaf surface under a magnifying glass for tiny, distorted bumps or thickened leaf tissue.

build How to fix it

shopping_cart Recommended Products

1 Inspect the plant closely for any remaining mites or larvae and treat the foliage with an organic miticide to eliminate the pest population.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Prune away any heavily distorted leaves or galled buds to prevent the mites from spreading to healthy parts of the plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

3 Ensure the plant is in a well-ventilated area to reduce the humidity levels that can favor mite activity.

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Psyllids

Some psyllid species can produce silk-like secretions that trap debris and create a webbed appearance around new growth. This is often accompanied by honeydew residue and the presence of sooty mold on the leaves.

Common

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How to confirm: Check for sticky residue (honeydew) on the leaves or black fungal growth underneath the webbing.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to eliminate psyllid nymphs and adults, and to control the silk-like secretions.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Prune and dispose of heavily infested new growth to reduce the pest population and prevent further webbing spread.

Fiskars 5/8" Bypass Pruning Shears