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Delphinium Blue Power White Powder
eco White Powder

Delphinium Blue Power – White Powder

Why does your Delphinium Blue Power have white powder? Diagnose the cause and fix it with our step-by-step guide.

yard View full Delphinium Blue Power care guide
Jump to cause: Powdery Mildew (Erysiphe cichoracearum) Botrytis Blight (Grey Mold) Aphid Honeydew/Sooty Mold

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Powdery Mildew (Erysiphe cichoracearum)

This is a fungal pathogen highly common in Delphiniums, especially in humid conditions with poor air circulation. The white, flour-like coating consists of fungal mycelium spreading across the leaf surfaces.

Very Common
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How to confirm: Inspect the undersides of leaves and look for circular patches that can be rubbed off easily with your finger.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic fungicide to the affected leaves to stop the spread of the fungal mycelium.
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
2 Prune and dispose of heavily infected leaves to prevent the pathogen from spreading to healthy foliage.
3 Improve air circulation around the plant and avoid overhead watering to reduce the humidity that favors mildew growth.
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Botrytis Blight (Grey Mold)

While typically associated with grey fuzzy mold, early stages or certain environmental conditions can present as pale, dusty-looking necrotic spots on Delphinium foliage and buds.

Common
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How to confirm: Check if the white patches are accompanied by soft, decaying tissue or browning of the flower buds.
build How to fix it
shopping_cart Recommended Products
1 Prune and remove all infected foliage and flower buds immediately to prevent the spread of fungal spores to healthy parts of the plant.
2 Apply an organic fungicide to protect remaining healthy tissue and control the spread of the blight.
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 Improve air circulation around the plant and avoid overhead watering to ensure foliage dries quickly, reducing the humidity that Botrytis thrives in.
warning

Aphid Honeydew/Sooty Mold

Aphids feeding on Delphinium stems excrete a sticky substance called honeydew; if secondary fungi like sooty mold begin to grow, it can appear as a dark or dusty coating.

Common
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How to confirm: Check the new growth and undersides of leaves for tiny, soft-bodied insects or a sticky residue on the stem.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic insecticide to eliminate the aphid population and stop the production of honeydew.
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 Gently wash the stems and leaves with water or a mild soap solution to remove the sticky residue and existing sooty mold.
3 Inspect the undersides of leaves regularly and use yellow sticky traps to monitor for any returning flying aphids.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
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