Begonia havana Rose 865 Fine Webbing - Causes & Fixes

Jump to cause: Two-Spotted Spider Mite Infestation Tetranychus urticae (European Red Mite) Low Ambient Humidity

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Two-Spotted Spider Mite Infestation

The fine webbing is a classic sign of spider mites, which thrive in the warm, dry conditions often experienced by Begonia 'Rose 865'. These arachnids pierce plant cells to feed, causing 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 crawling specks fall onto the paper.

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1 Immediately spray the plant with an organic miticide or insecticide to kill existing spider mites and their eggs.

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 leaves with a damp cloth to physically remove webbing and disrupt the mites' environment.

Flora Premium Plant Mister

Spray Bottles

$12

In Stock

3 Monitor soil moisture levels to ensure the plant does not become too dry, as drought stress can exacerbate mite infestations.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Tetranychus urticae (European Red Mite)

In many greenhouse-grown Begonias, red mites can cause dense webbing when humidity levels drop too low. This pest specifically targets the tender undersides of the fleshy leaves characteristic of this cultivar.

Common

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How to confirm: Inspect the undersides of the leaves for tiny, reddish or orange moving dots.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic miticide to eliminate the spider mites and destroy any remaining eggs or larvae on the leaf undersides.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase ambient humidity around the plant to make the environment less hospitable for mite reproduction.

Flora Premium Plant Mister

Spray Bottles

$12

In Stock

3 Gently wipe the undersides of the leaves with a damp cloth to physically remove webbing and mite populations.

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Low Ambient Humidity

While not a direct cause of webbing, extremely low humidity stresses 'Rose 865' and creates the ideal microclimate for mite populations to explode. Begonias require higher humidity levels to maintain leaf turgidity and prevent pest outbreaks.

Common

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How to confirm: Use a hygrometer to check if your environment stays consistently below 40-50% humidity.

build How to fix it

shopping_cart Recommended Products

1 Treat the fine webbing immediately with an organic insecticide to eliminate spider mite populations.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Increase local humidity around the plant by using a pebble tray or a fine misting spray bottle to prevent future mite outbreaks.

Flora Premium Plant Mister