Zantedeschia Captain Maestro Tiny Black Flies - Causes & Fixes

search Possible Causes

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Fungus Gnats

The most common cause of tiny black flies in Calla Lilies is fungus gnats, whose larvae thrive in the moist organic matter found in potting soil. They are attracted to the damp environment required by 'Captain Maestro' to prevent rhizome dehydration.

Very Common

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

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1 Deploy yellow sticky traps to capture adult flies and break the reproductive cycle.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

In Stock

2 Allow the top inch of soil to dry out completely between waterings to kill larvae in the organic matter.

GROWIT Analog Soil Moisture Meter

Water Meters

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3 Top dress the soil with a layer of horticultural perlite to create a dry barrier that prevents adults from laying eggs.

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Excessive Soil Moisture (Root Rot Precursor)

While not the flies themselves, overwatering creates the perfect breeding ground for pests and can lead to rhizome rot in 'Captain Maestro'. This moisture promotes fungal growth which serves as the primary food source for gnat larvae.

Very Common

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How to confirm: Insert your finger 2 inches into the soil; if it feels soggy or smells sour, reduce watering frequency immediately.

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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 Captain Jack's Neem Oil to eliminate adult flies and larvae, and treat the soil to prevent fungal growth.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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3 Repot the Calla Lily in a well-draining medium, incorporating perlite to improve aeration and prevent future moisture buildup.

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Decomposing Organic Matter

Accumulated dead foliage or old mulch around the base of the Calla Lily can host pupating insects and provide a nutrient-rich environment for pests. As 'Captain Maestro' grows, decaying leaves can become a breeding site.

Common

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How to confirm: Remove any yellowing or decaying leaves from the pot and inspect the surface of the soil for visible larvae.

build How to fix it

shopping_cart Recommended Products

1 Remove all dead, decaying foliage and old organic matter from the base of the plant to eliminate the breeding ground for the flies.

2 Apply a biological control spray to target the adult flies and larvae, and use yellow sticky traps to capture flying adults.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

In Stock

3 Ensure the top layer of soil is fresh and well-draining to prevent further accumulation of decomposing material.