Insect and Disease Management for Plants & Trees

Our team of experts evaluate plants & trees, identify pests & diseases, accurately diagnose, and depending on the causal factors, can successfully treat and control your living landscapes.

Plant and tree experts at Peninsula Environmental Group use an integrated approach to pest and disease management. Our horticulturalists, Certified Arborists, and plant and crop disease experts have accurately diagnosed and successfully treated thousands of trees, shrubs and lawns across the Pacific Northwest.

Prior to an analysis and diagnosis, our experts proactively maintain plant health both through soil conditions and environmental conditions. Peninsula can apply both organic and naturally based chemicals to soils and your plants.

Our Experts Commonly Treat the Following Plant and Tree Diseases and Pests Across Washington & Oregon:

Top Insects:

  • Bronze Birch Borer
  • Douglas-Fir Bark Beetles
  • Cherry & Peach Flatheaded Borers
  • Turpentine Beetle
  • Gypsy Moth
  • Emerald Ash Borer
  • Turpentine Beetle
  • Fir Engravers
  • Bronze Birch Borer
  • Thousand Cankers Disease in Walnuts
  • Lace Bugs
  • Spider Mites
  • Aphids

Top Diseases:

  • Laminated Root Rot
  • Armillaria
  • Anthracnose in Fruit Trees
  • Phytophthora
  • Dutch Elm Disease
  • Verticillium Wilt
  • Sudden Oak Death
  • Madrone Canker
  • Twig and Leaf Blights
  • Needle Casts
  • Drought Stress
  • Powdery Mildew
  • Fire Blight, Twig Blight and Blossom Blight


Anthracnose is a very common plant disease among both pacific northwest landscape and crops. The name is used to describe a variety of plant diseases that affect plants in similar ways. Anthracnose causes significant fruit tree damage, especially apples and pears. A variety of fungi cause the disease anthracnose.

Treatment and control of anthracnose is varied. Our plant healthcare experts will identify cultural, and environmental factors that cause anthracnose in your landscape. Some other fungicidal and organic treatments are available for use in specific scenarios.

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