Zantedeschia Captain Beretta Tiny Black Flies - Causes & Fixes

search Possible Causes

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Fungus Gnats

The presence of tiny black flies in Calla Lilies is most commonly due to fungus gnats, which breed in the moist organic matter of the topsoil. Their larvae feed on decaying plant material and can damage the delicate rhizome roots if populations become too high.

Very Common

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How to confirm: Set a yellow sticky trap near the soil surface to confirm the presence of flying adults.

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1 Deploy yellow sticky traps to capture the adult flying gnats and break the breeding cycle.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

In Stock

2 Reduce watering frequency and allow the top inch of soil to dry out completely to kill larvae in the moist organic matter.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Apply a top dressing of horticultural perlite to the soil surface to create a dry barrier that prevents adults from laying eggs.

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Excessive Soil Moisture

Calla Lily 'Captain Beretta' requires consistent moisture but is highly susceptible to root rot if the medium stays saturated. Constant wetness creates the perfect aerobic environment for fungus gnat larvae and other soil-dwelling pests.

Very Common

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How to confirm: Stick your finger two inches into the soil to check if it remains damp even days after watering.

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shopping_cart Recommended Products

1 Reduce watering frequency and allow the top inch of soil to dry out completely to disrupt the fungus gnat breeding cycle.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 Apply a biological control like Neem Oil or a targeted insecticide to eliminate adult flies and larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Repot the plant in a well-draining medium enriched with perlite to improve aeration and prevent future soil saturation.

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Over-fertilization with Organic Matter

Using heavy amounts of compost or uncomposted organic fertilizer in the Calla Lily pot can attract flies that seek out nitrogen-rich decaying matter. This provides an immediate food source and breeding ground for small dipteran pests.

Common

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How to confirm: Inspect the top layer of soil for visible bits of decomposing bark or manure.

build How to fix it

shopping_cart Recommended Products

1 Apply organic insecticide to eliminate the adult flies and larvae breeding in the soil.

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 infestation level.

Super Ninja Fungus Gnat Traps - 30 Pack