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Equisetum scirpoides Tiny Black Flies
eco Tiny Black Flies

Equisetum scirpoides – Tiny Black Flies

Why does your Equisetum scirpoides have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.

yard View full Equisetum scirpoides care guide
Jump to cause: Fungus Gnats (Sciaridae) Soil Moisture Excess leading to Root Decay Black Vine Weevil (Adult Stage)

search Possible Causes

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Fungus Gnats (Sciaridae)

The tiny black flies are likely adult fungus gnats, whose larvae thrive in the consistently moist substrate required by Equisetum scirpoides. The larvae feed on organic matter and decaying root tissues within the damp soil/medium.

Very Common
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How to confirm: Place a yellow sticky trap near the pot to confirm the presence of flying adults.
build How to fix it
shopping_cart Recommended Products
1 Deploy yellow sticky traps to capture the adult flying gnats and break the reproductive cycle.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
2 Allow the substrate to dry out slightly between waterings, as fungus gnat larvae thrive in overly saturated, organic media.
GROWIT Soil Moisture Meter SMM-V3
GROWIT Soil Moisture Meter SMM-V3
Water Meters
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3 Apply a biological control or organic insecticide to target the larvae in the soil and protect the root system.
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
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Soil Moisture Excess leading to Root Decay

While Scaly Horsetail loves moisture, stagnant water can cause anaerobic conditions. This decay provides a primary food source for fungus gnat larvae and other small dipterans.

Common
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How to confirm: Gently lift the plant to check if the rhizomes or roots feel slimy or smell of sulfur/rot.
build How to fix it
shopping_cart Recommended Products
1 Reduce watering frequency and allow the top inch of soil to dry slightly to disrupt the fungus gnat breeding cycle.
GROWIT Soil Moisture Meter SMM-V3
GROWIT Soil Moisture Meter SMM-V3
Water Meters
—
2 Apply a biological control to eliminate existing larvae and adults in the soil.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
3 Repot the plant in a well-aerated medium with improved drainage to prevent future anaerobic conditions and root rot.
Legigo Perlite 20qt
Legigo Perlite 20qt
18.9 L • Perlite
$27
In Stock
warning

Black Vine Weevil (Adult Stage)

Though less common for 'tiny' flies, certain small beetles or flies can be mistaken for gnats; these pests target the succulent stems of Equisetum.

Common
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How to confirm: Inspect the base of the scaly stems for any small notches or exit holes.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic insecticide spray to eliminate adult pests and protect the plant's stems from further damage.
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 Use yellow sticky traps to capture flying adults and monitor the population levels near the soil surface.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
3 Check the soil moisture levels to ensure the environment isn't overly damp, which can encourage pest breeding.
GROWIT Soil Moisture Meter - Blue
GROWIT Soil Moisture Meter - Blue
Water Meters
$12
In Stock

Other Equisetum scirpoides problems

Your plant might also be experiencing one of these issues:

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