Phalaenopsis Bordeaux Fine Webbing - Causes & Fixes

Jump to cause: Spider Mite Infestation Low Humidity Stress Thrips Damage (Secondary Webbing)

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Spider Mite Infestation

The presence of fine, silken webbing on orchid leaves is a classic sign of Spider Mites (Tetranychidae). These tiny arachnids pierce the Phalaenopsis cells to suck out nutrients, leading to stippling and eventual leaf drop.

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 specks fall onto the paper.

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1 Immediately spray the plant with an organic insecticide/miticide to kill existing mites and larvae.

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2 Wipe the leaves with a damp cloth to physically remove webbing and any remaining mites from the plant surface.

3 Increase humidity around the orchid, as spider mites thrive in dry conditions; consider using a pebble tray or mister.

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Low Humidity Stress

While not producing actual webs, extremely dry air can cause delicate orchid tissues to become brittle or trigger the production of fine, desiccated leaf edges that may resemble webbing in certain lighting.

Common

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How to confirm: Monitor your hygrometer to see if humidity levels are consistently dropping below 40% for extended periods.

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1 Increase ambient humidity around the orchid by using a pebble tray or a humidifier to prevent leaf tissue from becoming brittle.

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2 Mist the orchid's leaves and surrounding air regularly with a fine mist to maintain moisture levels.

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3 Ensure the orchid is planted in a well-draining, moisture-retentive medium like orchid bark to support consistent hydration.

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Thrips Damage (Secondary Webbing)

While Thrips do not spin webs, their feeding damage causes silver/gray scarring that can trap dust and moisture, sometimes creating a web-like appearance of debris over damaged areas.

Common

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How to confirm: Look for small, dark fecal spots (frass) on the leaves alongside the silvery discoloration.

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shopping_cart Recommended Products

1 Inspect the plant closely for tiny, slender insects or silver/gray scarring on leaves to confirm thrips presence.

2 Apply an organic insecticide spray to eliminate active pests and protect healthy plant tissues.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Wipe leaves with a damp cloth to remove the debris and dust that creates the web-like appearance.