Botanic Garden >> Gardening > >> Question and Answer >> Plant Species >> Trees

Spruce Red-Brown Needles: Cytospora Canker Management

Red-brown needles on Alberta spruce branch tips/whole branches = Cytospora canker (fungus). Strikes stressed, older trees. Resin patches on bark = sign. No cure for infected wood.

Suppress Spread

Prune dead branches in dry weather, disinfect tools (70% alcohol) between cuts.
Fertilize: 10-10-10 at 1 lb/inch trunk diameter before rain.
Water 1 inch weekly in drought.

Remove affected wood; boost vigor. No chemical control.

Trees: Pine Needle Management: Leave, Rake, or Mulch?; Cedar Needle Drop and Cedar-Quince Rust: Normal vs. Action Needed; 2,4-D Drift on Blue Spruce: Trees Usually Recover; Pine Needle Loss on Interior Branches: Natural Aging; Don't Use Horse Manure When Planting Colorado Blue Spruce; Identifying and Controlling Spruce Budworm on Colorado Spruce; Blue Spruce Rhizosphaera Needle Cast: Dead Branches Won't Regrow; Is My Pine Tree Dead? All Needles Brown; Identifying Spruce Species by Needle Characteristics; Identifying Fir vs. Spruce and Normal Inner Needle Drop

Garden Articles

Arborvitae Browning on Slope: Clay Soil and Water Issues

Norway Spruce Needle Drop in Indiana: Contact State Specialist

Spruce Needle Loss in Maryland: Miners, Mites, and Horticultural Oil

Storm-Damaged Alberta Spruce: Recovery Steps and When to Call an Arborist

Colorado Blue Spruce Windbreak: Planting Success and Septic Setback

Sapsucker Damage on Spruce: Holes and Needle Loss

Diagnosing Needle Drop in Mature Spruce

Plants

Neighbor's Spruce Trees: Growth Rates, Root Risks, and Solar Access Concerns

Colorado Blue Spruce Inner Needle Browning: Natural Shed vs. Disease Guide

Blue Spruce Spider Mite Infestation: Identification and Miticide Options

Winter Care for Spruce Seedlings Started Indoors

Blue Spruce Decline: Need Photos to Diagnose

Colorado Blue Spruce Heat Stress: Competition and Watering

Moving 15-ft Blue Spruce: Tree Spade Required