Connecticut State The Connecticut Agricultural Experiment Station

Conifers

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Conifer Tree Disease Image Gallery

This gallery contains images of common plant disease problems that occur in Connecticut. The disease name under each image links to a fact sheet that explains the disease and strategies for its control.

Orange fungal spore oozing from Cedar apple rust fungal fruiting body on a cedar tree     Botryosphaeria canker on a cedar branch

          Cedar-apple Rust                         Cedar Botryosphaeria canker

   Botryosphaeria canker on a Blue Atlas cedar branch     orange fungal spores oozing out from ceader a stem      

Cedar (Blue Atlas) Botryosphaeria canker                   Cedar-Quince Rust           

Browning of old needles on eastern red cedar trees damaged from environmental stress           Browning of old needles on a Eastern red cedar branch

Cedar Declining

Diplodia blight on Douglas fir         Rhabdocline needle cast of Douglas fir   

          Douglas Fir Diplodia Blight                 Douglas Fir Rhabdocline Needle Cast

Swiss needle cast of Douglas fir       Rhizosphaera needle cast of Douglas fir

        Douglas Fir Swiss Needle Cast          Douglas Fir Rhizosphaera Needle Cast

Delphinella needle blight of fir tree      Phytophthora root rot of Frazer fir in a Christmas tree farm

Fir Delphinella Shoot Blight                     Fir Phytophthora root rot  

Cedar hawthorne rust    Juniper Phomopsis tip blight with tip diebacks  

                Juniper Cedar-Hawthorn Rust            Juniper Phomopsis Tip Blight                   

Seiridium canker of Leyland cypress         Declining of a pine tree infected with pine wilt

Leyland Cypress Seiridium Canker                              Pine Wilt        

Dooks needle blight of white pine       Dooks needle blight of white pine

Pine Dooks Needle Blight

Diplodia blight of scot pine      Needle rust of blue spruce   

Pine Diplodia Blight                           Spruce Needle Rust 

 Browning of needles and fungal fruiting bodies of Rhizosphaera needle cast on blue spruce    Stigmina needle cast of blue spruce 

Spruce Rhizosphaera Needle Cast                 Spruce Stigmina Needle Cast    

   Winter injury at the tip of a Norway spruce branch       Diplodia blight on spruce  

Spruce Winter Injury                               Spruce Diplodia Blight    

      Phytophthora root rot in a yew hedge

Yew Phytophthora root rot 

 

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