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Glycine max Fine Webbing
eco Fine Webbing

Glycine max – Fine Webbing

Why does your Glycine max have fine webbing? Diagnose the cause and fix it with our step-by-step guide.

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Jump to cause: Two-Spotted Spider Mite (Tetranychus urticae) Tarnished Plant Bug (Picnic Bug) High Humidity/Condensation Fungal Growth

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Two-Spotted Spider Mite (Tetranychus urticae)

These arachnids pierce soybean leaf cells to suck out contents, leaving behind fine silk webbing as they build colonies. This is most common in hot, dry conditions where soybean transpiration rates are high.

Very Common
lightbulb
How to confirm: Hold a white piece of paper under a leaf and tap it; if tiny crawling dots or fine dust fall onto the paper, it is spider mites.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic insecticide spray to eliminate existing spider mite colonies, ensuring you coat the undersides of the leaves where they reside.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
2 Increase local humidity and reduce heat stress by misting the foliage regularly to make the environment less hospitable for mites.
Flora Premium Plant Mister
Flora Premium Plant Mister
Spray Bottles
$12
In Stock
3 Monitor soil moisture levels closely to prevent the hot, dry conditions that trigger mite outbreaks.
GROWIT Soil Moisture Meter SMM-V3
GROWIT Soil Moisture Meter SMM-V3
Water Meters
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warning

Tarnished Plant Bug (Picnic Bug)

While primarily known for causing necrotic spots on soybean pods, nymphs can create silk-like structures and localized webbing during feeding stages in certain microclimates.

Common
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How to confirm: Inspect the undersides of leaves and developing pods for small, brownish insects with a distinct shield shape.
build How to fix it
shopping_cart Recommended Products
1 Inspect the soybean plants closely for any remaining nymphs or larvae and remove them manually to prevent further feeding damage.
2 Apply an organic insecticide spray to eliminate any remaining pests and disrupt their life cycle.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
3 Monitor the plant for any new necrotic spots on the pods and ensure the area is well-ventilated to reduce microclimates that favor webbing.
warning

High Humidity/Condensation Fungal Growth

In extremely dense soybean canopies with poor airflow, high humidity can cause moisture to trap fine fungal hyphae that may resemble light webbing.

Common
lightbulb
How to confirm: Check if the 'webbing' is accompanied by fuzzy mold or dark spots on the leaf surface rather than moving particles.
build How to fix it
shopping_cart Recommended Products
1 Improve airflow around the soybean canopy by pruning dense foliage and increasing spacing between plants to reduce trapped moisture.
2 Apply an organic fungicide to eliminate fungal hyphae and protect the plant from further spread.
Bonide Captain Jack's Copper Fungicide 32 oz
Bonide Captain Jack's Copper Fungicide 32 oz
0.9 L • 1 pcs • Organic
$12
In Stock
3 Monitor soil moisture levels to ensure the root zone is not excessively wet, which contributes to high humidity in the canopy.
GROWIT Analog Soil Moisture Meter
GROWIT Analog Soil Moisture Meter
Water Meters
—

Other Glycine max problems

Your plant might also be experiencing one of these issues:

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