Common Garden Pests and Problems

Here are over 200 of the most frequently encountered garden plant problems by the Plant Doctors at the William T. Kemper Center for Home Gardening.

Most are problems gardeners experience almost anywhere, but some problems are more specific to our area. In our resource guide, we have followed an integrated pest management approach to control recommendations where simple, very safe, and less invasive strategies are listed first. This is the same approach we use with visitors to our walk-in Plant Doctor service located in the Kemper Center as well as with callers to our phone-in Horticultural Answer Service. Recommendations using chemical pesticides, though not excluded in an integrated pest management approach, generally appear lower down in the list of recommended strategies. Strictly organic strategies are pointed out.

We hope this guide aids you in identifying the problems in your yard, garden, and indoor garden and assists you in making wise and timely management decisions.

Trees and Shrubs

Diseases and Disorders     Thousand Cankers Disease
  Air Pollution     Verticillium Wilt
  Anthracnose of Trees     Why Trees and Shrubs Fail
  Armillaria Root Rot     Winter Injury: Frost Cracks
  Ash Yellows and Decline     Winter Injury: Frost & Ice Damage
  Bacterial Leaf Scorch (BLS)      
  Bacterial Wetwood   Insects and Insect-like Pests
  Black Spot of Rose     Bagworms
  Chestnut Blight     Boxelder and other Plant Bugs
  Crown Galls     Bronze Birch Borer
  Drought and Water Stress     Cankerworms
  Dutch Elm Disease     Carpenter Ants
  Fireblight     Dogwood Borer 
  Ganoderma Root Rots     Eastern Tent Caterpillar
  Girdling Roots     Elm Leaf Beetle
  Gradual Decline     Emerald Ash Borer
  Guignardia Blotch of Horse Chestnut     Eriophyid Mites
  Hail Damage     Euonymus Scale
  Herbicide Damage to Plants     Fall Webworm
  Hypoxylon Dieback of Oaks     Forest Tent Caterpillar (FTC)
  Iron Chlorosis     Gypsy Moth
  Improper and Damaging Practices     Japanese Beetle
  Leaf Spot Diseases of Trees     Lace Bugs
  Leaf Spots of Dogwood     Leaf-cutter Bees
  Lightning Injury     Leafhoppers and Planthoppers
  Mechanical Damage     Lilac Borer and Ash Borer
  Nectria Canker and Dieback     Magnolia and Tuliptree Scale
  Nutrient Deficiencies     Rose and Pear Slugs (Sawflies)
  Oak Leaf Blister     Scale Insects - Outdoors
  Oak Wilt     Spider Mites - Outdoors
  Overwatering      
  Ozone Damage to Plants   Other
  Phytophthora Root Rot     Gall-forming Eriophyid Mites
  Powdery Mildew - Outdoors     Galls on Trees
  Rose Rosette     Gouty, Horned and other Twig Galls
  Salt Injury     Jumping Oak Galls
  Scorch, Sunburn, and Heat Stress      
  Sudden Decline   Weeds and Parasitic Plants
  Sulfur Dioxide Damage to Plants     Mistletoe
  Sunscald of Woody Plants      
  Sycamore Anthracnose      
Yard and Garden

Animals   Insects and Insect-like Pests
  Beavers     Carpenter Bees
  Cats     Itch Mites
  Chipmunks or Ground Squirrels     Slugs and Snails
  Deer     Yellow Jackets
  Dogs      
  Earthworms   Other
  Moles      Nuisance Pests of Humans
  Nuisance Birds      
  Rabbits   Weeds 
  Raccoons      Perennial Broadleaf Weeds
  Squirrels      Perennial Grassy Weeds
  Voles and Mice      Summer Annual Weeds
         Winter Annuals
         Woody Perennial Weeds
Miscellaneous

  Beneficial Insects      
  Household Pests      
  Normal      
Pests and Problems by Category

Click a link in the site map below to see other "Pests and Problems" pages.