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Zucchini Fruit Rot: Water Management

Zucchini fruit yellowing and dropping at 1-2 inches suggests fungal rot exacerbated by frequent sprinkler irrigation. Water deeply but infrequently (every 4-5 days) in morning only. Mulch under fruit. Apply sulfur spray or Serenade (Bacillus subtilis) under new flowers.

Sprinkler Issue

Daily sprinkler wetting promotes fungal growth. Switch to drip irrigation or soaker hose.

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