Pest Watch

 

 

Asian Longhorn Beetle

Type:  stem borer                  

Where is it currently?  New York, New Jersey, Chicago

Host plants:   Maple, Willow, Poplar, Elm, Black Locust, Horse-chestnut

Symptoms:

Entry and exit holes, sometimes oozing sap

Sawdust at base of tree 

 

                       www.uvm.edu/albeetle/

                       http://www.ars.usda.gov/is/AR/archive/jun00/asian0600.htm

                             http://www.invasivespeciesinfo.gov/animals/asianbeetle.shtml

 

 

 

Hemlock Wooly Adelgid                           

Where is it currently?  Southern region of the Northeast    Chicago,

New York, Pennsylvania                  

Type:  sap sucker                             

Host plants:   Canadian and Carolina Hemlock in the eastern U.S.

Symptoms:

Needles turn gray-green

Needle drop

Buds are killed

Branch dieback from the bottom of tree upwards

Possible death of tree within 4 years

 

                          http://www.invasivespeciesinfo.gov/animals/hwa.shtml

                          http://www.dcnr.state.pa.us/forestry/woollyadelgid/index.aspx

                          

 

 

           

Emerald Ash Borer                               

Where is it currently? predominately in the Midwest

Illinois, Michigan, Maryland, Ohio, Ontario

Moving on firewood

Type:  stem borer                                   

Host plants:    Ash, Elm, Walnut, Wingnut                                                   

Symptoms:

Thinning crown

Dieback

Epicormic branching

Exit holes

Woodpecker damage

 

                      http://www.emeraldashborer.info/

                      http://www.invasivespeciesinfo.gov/animals/eab.shtml

                      http://www.dcnr.state.pa.us/forestry/fpm_invasives_EAB.aspx

 

 

Sudden Oak Death                                                                         

Type:   stem canker                            

Where is it currently? West coast of United States

California, Oregon, Maine

1 case found in Pennsylvania 

Moving on nursery stock 

Host plants:   Oak, Camellia, Rhododendron                                           

Symptoms:

Cankers on bark

Bark cankers on lower portion of trunk

Oozing sap

Leaf browning/foliage loss

Leaf spots usually toward tip end

 

                     http://nature.berkeley.edu/comtf/

                     http://www.invasivespeciesinfo.gov/microbes/suddenoak.shtml

                    

 

 

Viburnum Leaf Beetle                         

Type: defoliator                                   

Where is it currently?   From Europe it came to Montreal

New York, Maine, Vermont, Pennsylvania, Ohio

Spread is southward

Host plants:            Viburnum, especially arrow-wood and                                                               

European cranberry bush                      

Symptoms:

Skeletonization of leaves

Heavily chewed leave/defoliation

Egg sites in rows along stems

 

             http://www.entomology.cornell.edu/Extension/DiagnosticLab/IDLFS/VLBfactsheet2003.html