Black Knot on Mulberry: Prune and Destroy

Likely Diagnosis

"Black Spurge" is probably Black Knot, a fungal disease causing black, swollen galls on branches.

Control

• Prune out galled branches 4–6 inches below knot.
• Destroy pruned material (burn/bury).
• Fungicides (e.g., chlorothalonil) can be sprayed as protectant.