The Plant Disease Information Office

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Image Gallery

This gallery contains images of common plant disease problems which occur in Connecticut. Clicking the link below an image will open a fact sheet which explains the disease and options for management.

[Vegetables]  [Woody Ornamentals]  [Herbaceous Ornamentals]  [Lawn]  [Fruit]   [Conifers]


       Basil Downy Mildew       

      Basil Downy Mildew                             Basil Bacterial Leaf Spot

               Cucumber Anthracnose

                     Beet Fungal Leaf Spot                            Cucumber Anthracnose            


Cucurbit Anthracnose                                   Cucumber Downy Mildew

        Cucurbit Powdery Mildew        Eggplant Verticillium Wilt 

           Cucurbit Powdery Mildew                      Eggplant Verticillium Wilt

     Pepper Bacterial Leaf Spot          Pepper Phytophthora Blight

 Pepper Bacterial Leaf Spot                               Pepper Phytophthora Blight 

     Potato Late Blight        Tomato Anthracnose

       Tomato Anthracnose                                                      Potato Late Blight

        Tomato Blossom End Rot      Tomato Early Blight

  Tomato Blossom End Rot                       Tomato Early Blight


Tomato Fusarium Wilt

Tomato Late Blight     Tomato Leaf Mold

 Tomato Late Blight                              Tomato Leaf Mold

      Tomato Powdery Mildew      Tomato Septoria Leaf Spot
     Tomato Powdery Mildew                      Tomato Septoria Leaf Spot


         Tomato Gray Leaf Spot                  Tomato Cercospora Leaf Mold







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  Woody Ornamentals

       Amelanchier Rust      Ash Leaf Rust
Amelanchier Rust                                  Ash Leaf Rust
       Azalea Leaf Gall       Beech Anthracnose
       Azalea Leaf Gall                                 Beech Anthracnose


Beech Leaf Disease

Birch Anthracnose

Boxwood Blight       Boxwood Macrophoma Leaf Spot

                        Boxwood Blight                     Boxwood Macrophoma Leaf Spot

      Boxwood Volutella Canker       

                   Boxwood Volutella Canker                                     Boxwood Winter Injury              

   Cherry Black Knot

 Butterfly bush Phytophthora root rot                          Cherry Black Knot                

Crabapple Rust       Crabapple Scab

 Crabapple Rust                                     Crabapple Scab

    Dogwood Anthracnose       Dogwood Powdery Mildew

          Dogwood Anthracnose                    Dogwood Powdery Mildew

   Elm Dutch Elm Disease      Elm Stegophora Leaf Spot

          Dutch Elm Disease                       Elm Stegophora Leaf Spot

Enkianthus Anthracnose      

                   Enkianthus Anthracnose                                       Fir Phytophthora root rot                  

Forsythia Phytophthora root rot

Hawthorn Anthracnose      Hawthorn Entomosporium Leaf Spot

         Hawthorn Anthracnose              Hawthorn Entomosporium Leaf Spot

Holly Winter Injury

Holly Winter Injury

Holly Phyllosticta Leaf Spot      Honey Locust Cercospora Leaf Spot

      Holly Phyllosticta Leaf Spot           Honey Locust Cercospora Leaf Spot

   Horse Chestnut Leaf Blotch      Lilac Powdery Mildew

 Horse Chestnut Leaf Blotch                     Lilac Powdery Mildew

   Maple Anthracnose      Maple Tar Spot

Maple Anthracnose                         Maple Tar Spot

Maple Botryosphaeria Canker

Maple Botryosphaeria Canker

Maple Verticillium Wilt      Mountain Laurel Leaf Spot

      Maple Verticillium Wilt                 Mountain Laurel Leaf Spot


Oak Powdery Mildew      

             Oak Powdery Mildew                                       Pear Trellis Rust                  

   Plum Black Knot

Pear Scab                                                   Plum Black Knot

Rhododendron Fungal Leaf Spot       Rhododendron Leaf Gall

Rhododendron Fungal Leaf Spot           Rhododendron Leaf Gall

   Rhododendron Winter Injury      

              Rhododendron Winter Injury                   Rhododendron Phytophthora root rot      

Rose Black Spot

Rose Black Spot

  Rose Brand Canker      Rose Downy Mildew

        Rose Brand Canker                                          Rose Downy Mildew

  Rose Powdery Mildew      Rose Rust

Rose Powdery Mildew                        Rose Rust

Spruce Winter Injury  Sycamore Powdery Mildew     

          Spruce Winter Injury                         Sycamore Powdery Mildew             





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Herbaceous Ornamentals

  Begonia Botrytis Blight      Begonia INSV

 Begonia Botrytis Blight                                 Begonia INSV
  Begonia Powdery Mildew      Calibrachoa Botrytis Blight
    Begonia Powdery Mildew                    Calibrachoa Botrytis Blight
   Cineraria INSV      Coleus Downy Mildew
  Cineraria INSV                             Coleus Downy Mildew
   Calibrachoa Thielaviopsis Black Root Rot                  Tulip Botrytis Blight

  Lily Botrytis Blight     Heuchera Botrytis Blight

                 Lily Botrytis Blight                            Heuchera Botrytis Blight
  Zinnia Botrytis Blight     Poinsettia Botrytis Blight
        Zinnia Botrytis Blight                               Poinsettia Botrytis Blight
  Sedum Botrytis Blight
Pythium Blight      Red Thread
   Pythium Blight                                        Red Thread

Rhizoctonia Blight      Snow Mold

 Rhizoctonia Blight                        Snow Mold


Apple Cedar-Apple Rust      Apple Fire Blight

Apple Cedar-Apple Rust                      Apple Fire Blight

       Apple Scab      

                               Marssonina Blotch of Apple                           Apple Scab                                            

Blueberry Botrytis Blight

Blueberry Botrytis Blight

      Grape Black Rot      Grape Downy Mildew

             Grape Black Rot                            Grape Downy Mildew    

    Grape Powdery Mildew      Grape Anthracnose

  Grape Powdery Mildew                       Grape Anthracnose

    Peach Brown Rot      Peach Leaf Curl

 Peach Brown Rot                          Peach Leaf Curl

    Peach Powdery Mildew      Pear Fabraea Leaf Spot

          Peach Powdery Mildew                    Pear Fabraea Leaf Spot

   Pear Scab      Plum Black Knot

   Pear Scab                                    Plum Black Knot

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   Douglas Fir Diplodia Blight      Douglas Fir Rhabdocline Needle Cast

                  Douglas Fir Diplodia Blight                     Douglas Fir Rhabdocline Needle Cast

  Douglas Fir Swiss Needle Cast      Douglas Fir Rhizosphaera Needle Cast

               Douglas Fir Swiss Needle Cast              Douglas Fir Rhizosphaera Needle Cast

  Juniper Cedar-Hawthorn Rust      Juniper Cedar-Quince Rust

     Juniper Cedar-Hawthorn Rust                     Juniper Cedar-Quince Rust

  Leyland Cypress Seiridium Canker      Scots Pine Diplodia Blight

          Leyland Cypress Seiridium Canker                          Scots Pine Diplodia Blight

  Spruce Needle Rust      Spruce Rhizosphaera Needle Cast

   Spruce Needle Rust                Spruce Rhizosphaera Needle Cast


  Spruce Stigmina Needle Cast     White Pine Dooks Needle Blight

              Spruce Stigmina Needle Cast              White Pine Dooks Needle Blight        



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