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Collard Green Fungus in New Mexico: Organic Options

Grey patches on stems/leaves = fungus (likely Alternaria or Cercospora). Wet drip system favors it.

Organic Treatment

Copper-based fungicide (OMRI-listed).
Neem oil.
Bacillus subtilis (Serenade).
Reduce watering frequency; water at base only.

Copper sulfates are low-toxicity and effective.

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