Thousand Cankers Disease Found in PA

[Mike Cantolina]

I saw this elsewhere and thought it important to post here:

http://www.portal.state.pa.us/porta...disease_found_in_pa_trees,_quarantine_imposed

 

[TimberMcPherson]

Not good, I wonder how they will police all those restrictions.

 

[PJM]

That's not good. State crews in NY began surveying for TCD this summer ...

 

[John Paul Sanborn]

This is a USFS distribution map for TCD, but it looks like black walnut distribution, so from the file title it must be threat of spread vs actual.

 

[VA-Sawyer]

We just don't seem to learn the lessons from these disasters....... Thousand Canker..... EAB.....Dutch Elm....... Chestnut Blight, etc. I think it should be a hanging offense for bringing such stuff into the country.
Rick

 

[Toddppm]

Just got a letter today, it was found and confirmed in Southern Va. in July

 

[newsawtooth]

This is a USFS distribution map for TCD, but it looks like black walnut distribution, so from the file title it must be threat of spread vs actual.

The states bordered in red have significant confirmed populations of trees with TCD. These states are outside the native range and involve introduced populations and Arizona Walnuts. The green is the native range. The other day I inspected a Butternut, (white walnut) that had thousand cankers. If the fungus and twig beetle spread to native stands of Black Walnut, the tree will be functionally eliminated from the landscape, Butternuts as well.

 

[John Paul Sanborn]

This is all the pertinent info I can find on Carya sp. Hickory being in Jugandaceae and an important native species in WI. The thought that other bark beetles will pick it up.....

Two important native species within the family Juglandaceae were exposed to the Geosmithia morbida in pathogenicity tests (Utley et al., 2009). These preliminary tests demonstrated that butternut (Juglans cinerea) developed cankers but pecan (Carya illinoinensis) did not, and appears to be resistant (or entirely immune) to the pathogen (Utley et al. 2009).

http://www.tn.gov/agriculture/publications/regulatory/TN_TCD_ActionPlan.pdf

Follow-up field surveys and additional sampling will be conducted for those plantations, riparian forests and urban and community forests and roadways whose samples yield the fungus or exhibit evidence of Pityophthorus colonization or canker presence. Affected branches of symptomatic trees will be collected for insect emergence or for visual examination of beetle or gallery presence. The presence of fungi associated with necrotic tissue or obvious cankers will be determined through isolation based on protocols for Geosmithia and other putative pathogens reported on J. nigra. Because Geosmithia species are common microbial associates of bark beetles, the scientists will also assay Scolytus quadrispinosus for presence of such species. S. quadrispinosus is associated with extensive canker occurrence and rapid crown decline in Carya cordiformis (family Juglandaceae) in north central and northeastern states. Much smaller cankers are caused by F. solani compared to those caused by Ceratocystis smalleyi on declining C. cordiformis. In the TCD situation, cankers caused by F. solani on J. nigra are considered to develop later in the progression of the disease compared to cankers caused by G. 'morbida'. Thus, F. solani is considered a secondary pathogen in both TCD and in hickory decline. Morphological and molecular characteristics of all Geosmithia and Fusarium isolates obtained from Juglans and Carya species as well as from bark beetles will be compared with isolates from Colorado.

http://www.na.fs.fed.us/fhp/fhw/csfhw/10/jan10.pdf

 

[treefaller25]

Great imformation.For one minute I thought we where talking about girls from Chester,pa.:msp_ohmy: