Lactuca sativa Fine Webbing - Causes & Fixes

Jump to cause: Two-Spotted Spider Mite Infestation Cyclamen Mite Infestation Extreme Environmental Desiccation

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Two-Spotted Spider Mite Infestation

The most common cause of fine webbing on lettuce is the presence of spider mites, which thrive in hot, dry conditions. These microscopic pests pierce plant cells to suck out nutrients, leading to stippling and silk production.

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 crawling specks fall off.

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1 Immediately spray the lettuce leaves with an organic insecticide to eliminate the spider mite population and destroy eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase humidity and reduce heat around the plant to make the environment less hospitable for mite reproduction.

3 Monitor soil moisture levels closely to ensure the plant remains hydrated, as dry conditions accelerate mite outbreaks.

GROWIT Soil Moisture Meter - Blue

Water Meters

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Cyclamen Mite Infestation

While less common than spider mites, cyclamen mites can cause webbing and structural damage to the delicate leaves of lettuce. They tend to cluster in the tight crevices of the leaf heads.

Common

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How to confirm: Inspect the inner heart of the lettuce head for unusual webbing or discoloration.

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shopping_cart Recommended Products

1 Apply an organic miticide/insecticide spray to the lettuce leaves, ensuring you target the tight crevices and leaf heads where mites cluster.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Inspect the plant closely for any remaining webbing and use a soft brush or water spray to physically remove visible mites and debris.

3 Monitor soil moisture levels to ensure the environment does not become too dry, as low humidity can exacerbate mite activity.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Extreme Environmental Desiccation

In very low humidity, the fine hairs (trichomes) on some lettuce varieties can trap dust and moisture, occasionally creating a web-like appearance. This is usually accompanied by wilting and crispy leaf edges.

Common

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How to confirm: Check if the surrounding humidity levels have dropped significantly or if there is a lack of airflow.

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shopping_cart Recommended Products

1 Increase ambient humidity around the lettuce to prevent further leaf desiccation and wilting.