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Onion Paraat F1 Tiny Black Flies
eco Tiny Black Flies

Onion Paraat F1 – Tiny Black Flies

Why does your Onion Paraat F1 have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.

yard View full Onion Paraat F1 care guide
Jump to cause: Fungus Gnats Sciarid Flies Black Scab (Allion) secondary attraction

search Possible Causes

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Fungus Gnats

The larvae of fungus gnats live in moist organic matter and feed on fine root hairs, which can weaken the onion bulb development. The tiny black flies seen hovering near the soil surface are the adult stage of these pests.

Very Common
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How to confirm: Place a yellow sticky trap near the base of the onions to see if small winged insects are captured.
build How to fix it
shopping_cart Recommended Products
1 Deploy yellow sticky traps near the soil surface 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 Reduce watering frequency and allow the top inch of soil to dry out completely to eliminate the moist environment required for larvae survival.
GROWIT Soil Moisture Meter - Blue
GROWIT Soil Moisture Meter - Blue
Water Meters
$12
In Stock
3 Apply a biological control or organic insecticide to target the larvae in the soil and protect the onion root system.
Bonide Captain Jack's Deadbug Brew 16 oz
Bonide Captain Jack's Deadbug Brew 16 oz
0.5 L • Organic
$15
In Stock
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Sciarid Flies

Similar to fungus gnats, Sciarid flies thrive in overly damp onion beds and their larvae can cause secondary rot by damaging the root system. They are attracted to the high moisture levels often required for Allium growth.

Very Common
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How to confirm: Check if the soil surface remains saturated for long periods, creating an ideal breeding ground.
build How to fix it
shopping_cart Recommended Products
1 Deploy yellow sticky traps to capture adult flies and monitor the infestation level.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
2 Reduce watering frequency to allow the top layer of soil to dry out, as Sciarid flies thrive in overly damp conditions.
GROWIT Analog Soil Moisture Meter
GROWIT Analog Soil Moisture Meter
Water Meters
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3 Improve soil aeration by incorporating perlite into the planting medium to prevent the moisture retention that attracts these pests.
Legigo Perlite 20qt
Legigo Perlite 20qt
18.9 L • Perlite
$27
In Stock
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Black Scab (Allion) secondary attraction

While Black Scab is a fungal disease caused by *Leptosphaeria exigua*, the decaying organic matter and weakened plant tissue can attract various small dipteran flies to the site.

Common
lightbulb
How to confirm: Inspect the outer scales of the onion bulb for dark, sunken lesions or fungal growth.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic insecticide to eliminate the adult flies and prevent further egg-laying near the plant tissue.
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 Remove and destroy any decaying organic matter or infected plant debris to eliminate the secondary attraction for the flies.
3 Monitor soil moisture levels to ensure the environment does not remain overly damp, which can exacerbate fungal issues and fly breeding.
GROWIT Soil Moisture Meter - Blue
GROWIT Soil Moisture Meter - Blue
Water Meters
$12
In Stock

Other Onion Paraat F1 problems

Your plant might also be experiencing one of these issues:

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