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Tall Cactus White Haze & Black Areas: Need ID for Treatment

Critical Distinction

White haze + black/brown rot. Could be cactus or Euphorbia. Treatment differs.

Need Photo

Email to gregandkat@msn.com. Fertilizer (7 drops) may have burned roots if overapplied.

General Rescue

Cut above rot.
Callus, re-root in cactus mix.
Stop fertilizer until established.

ID first – Euphorbia sap changes everything.

Cactus: Surgical Rescue of a Rotting Pilosocereus Azureus; Black Tip Rot on a Tall Columnar Cactus; Chronic Fungal Spots on a 30-Year-Old Prickly Pear (Opuntia); Dish Garden Disaster: Rot in a Mixed Succulent Arrangement; Peruvian Apple Cactus Decline After Move and Cold; 7.5-Ft Cactus Blown Over, Cracked, Black Gash: Cut Black Parts, Callus, Replant; Small Orange Cactus Black Spots After Vacation: Overwatered, Let Dry, Watch Spots; Cactus Black Squishy Tip: Cut Top + 1-2 Inches, Else Rot Spreads; Rescuing Old Cacti: Diagnosing Rot, Shriveling, and Grafting Options; Black Spots on Indoor Cactus: Rot from Overwatering and Low Light

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