1. Home
  2. Question and Answer
  3. Houseplants
  4. Garden Articles
  5. Most Popular Plants
  6. Plant Nutrition
 Botanic Garden >> Gardening >  >> Question and Answer >> Plant Diseases

Oak Tree Black Bumps on Limbs: Scale Insects

Oak Tree Black Bumps on Limbs: Scale Insects

Oak with small black bumps in rows on lower limbs: scale insects. Oval, immobile, scrape off, liquid inside.

Treatment

  • Bayer Advanced Tree and Shrub Insecticide soil drench.
  • Systemic kills in 2 weeks; protects 1 year.
  • Available at Home Depot.

Don't cut limbs or spray; systemic is easiest and most effective for scale on large trees.

Plant Diseases
Black Spots on Japanese Maple Bark: Likely Harmless Lichens
Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine
Oak Leaf Spot Management: Sanitation, Watering, and Timely Fungicides
Black Oak Sudden Oak Death or Slime Flux in California Mountains
Oak Tree Black Spots on Trunk: Need Photos for Canker ID
Mango Tree Black Spots on Branches: Check for Scale
Red Oak Losing Limbs in Summer: Drought Stress, Not Borers
Black Wet Areas on Oak Trunk: Borer Damage, Not Fatal
Rubber Tree Black Spots: Sunburn, Not Fungus
California Black Oak: Majestic Native Tree for Wildlife and Timber
Garden Articles

Understanding Bark Damage on Pin Oak Trees

Black Spots on Sugar Maple Trunk: Borers or Bleeding Canker?

Hundreds of Black Beetles on Young Oak: Identification and Control Options

Red Spots on Oak Leaves: Leaf Spot or Gall Insects?

Maple Leaf Galls: Insect-Caused Bumps on Autumn Blaze Maple

Yucca Leaf Spots: Cosmetic Fungus, Not Fatal

Willow Oak with Black Bark and Yellowing Leaves: Fertilization and Mold Check

Plants

Pecan Tree Limb Drop: Drought, Weevils, and Borers

Young Oak Vertical Bark Cracks: Stress Injury, Consider Replanting

Oak Tree Fuzzy Spots: Photo Request for Gall vs. Disease Diagnosis

Oak Insect Galls: Benign Wasp Nurseries on Mature Tree

Apple Tree Sooty Mold: Organic vs. Chemical Control

Black Spots on Trees in Wet Area: Need Better Photo

Hypoxylon Canker on Water Oak: Post-Flood Stress and What You Can Do

Copyright © www.100flowers.win Botanic Garden All Rights Reserved