Canna South Pacific F1 Scarlet Fine Webbing - Causes & Fixes

Jump to cause: Two-Spotted Spider Mite Infestation Tetranychus urticae (European Red Mite) Outbreak Extreme Low Humidity/Desiccation

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Two-Spotted Spider Mite Infestation

Spider mites thrive in the warm, dry conditions often experienced by Canna lilies. They feed on the undersides of the leaves, piercing cells and leaving behind fine silk webbing as they build colonies.

Very Common

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How to confirm: Tap a leaf over a white piece of paper to see if tiny crawling specks fall off.

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1 Immediately spray the plant, especially the undersides of leaves, with an organic miticide to kill existing mites and larvae.

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 stays moist, as spider mites thrive in dry environments.

Flora Premium Plant Mister

Spray Bottles

$12

In Stock

3 Check the plant regularly using a moisture meter to prevent the dry conditions that trigger mite outbreaks.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Tetranychus urticae (European Red Mite) Outbreak

This specific mite species is highly aggressive on Canna cultivars, causing the fine webbing to become more dense and visible as they deplete the plant's chlorophyll.

Very Common

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How to confirm: Inspect the leaf undersides for tiny orange or reddish dots moving near the webbing.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic miticide/insecticide spray to the plant to eliminate the mites, eggs, and larvae, ensuring you coat the undersides of the leaves where they hide.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase humidity around the plant and wipe down leaves with a damp cloth to physically disrupt the webbing and create an environment less favorable to spider mites.

3 Monitor soil moisture levels closely to ensure the plant is not under drought stress, as dehydrated plants are more susceptible to mite outbreaks.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Extreme Low Humidity/Desiccation

While not a direct cause of webbing, severe lack of humidity can stress Canna lilies, making them more susceptible to mite attacks and causing leaf edges to look slightly 'tattered' or web-like due to drying.

Common

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How to confirm: Check if the soil surface is bone dry and if there is any localized heat source near the plant.

build How to fix it

shopping_cart Recommended Products

1 Inspect the undersides of leaves for tiny moving dots or webs to confirm if spider mites have moved in due to the dry conditions.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase ambient humidity around the plant by using a pebble tray or a fine misting spray bottle to prevent further leaf desiccation.

Flora Premium Plant Mister