Saturday, November 11, 2017

2017 Durham VA Poinsettia Project to Honor Veterans

Honor a US Veteran by sponsoring a poinsettia for the Durham VA Chapel!
Mail your order form to the Forest Hills Garden Club before Nov. 18 and gift a holiday poinsettia
to a patient at the VA Medical Center.
 

Wednesday, November 8, 2017

Documentary: 'Deeply Rooted: John Coykendall’s Journey To Save Our Seeds and Stories'

John Coykendall's work to preserve heirloom seeds is the subject of the documentary "Deeply Rooted"
and can be viewed in its entirety for a short time on Lousiana PBS.

For nearly four decades, John Coykendall’s passion has been preserving the farm heritage – the seeds and stories - of a small, farming culture in Southeastern Louisiana and this work is the subject of a new documentary from Louisiana Public Broadcasting.
 
John Coykendall is a renowned heirloom seed saver, a classically trained artist, and Master Gardener at Tennessee's Blackberry Farm, one of America’s top farm-to-table resorts. Since 1973, he has made an annual pilgrimage to Louisiana, where he has recorded the oral histories, growing techniques, recipes and folktales of Louisiana farmers and backyard gardeners in more than 80 beautifully illustrated journals. He has saved and safeguarded rare varieties of the crops they once grew, and handed them back to the communities where they came from.
 
"Seeds carry with them more than the potential to sustain people as food, they are living history of the people who cared and tended to them and cultivated them and passed them down. I feel 100-percent total obligation, I am the caretaker," believes Coykendall. "This is what we’re working to save, this history, the heritage, the way of life, the way of farming, way of cuisine, everything to do needs to be preserved while its still here to be preserved."

Pages from John's journals of the oral histories from farmers in the Washington Parish, Louisiana.

This documentary is nominated for two 2017 Suncoast Emmy Awards and is being nationally distributed by American Public Television. Contact your local PBS station for broadcast information.

Monday, November 6, 2017

Pest Spotlight: Eutypella Canker on Maple Trees

Eutypella Canker
Eutypella Canker On Maple. Insects boring into pine trees often result in pitch
or sap seen on the bole or branches. Photo by University of Georgia.
By Rebecca Koetter and Michelle Grabowski
S. Schimek, MN Dept. of Agriculture
 
Importance
Eutypella canker is common on maple trees (Acer spp.) in landscape plantings and in natural areas. Cankers often form on the main trunk or major branches of the tree. Small trees that are less than 4 inches in diameter are commonly killed when the canker girdles the main trunk. On older trees a perennial canker forms. This is a very slow growing disease that trees will battle for decades before decay turns the tree into a hazard that requires the tree to be removed.
 
Pathogen and susceptible plants
Eutypella canker is a fungal disease caused by Eutypella parasitica. All trees in the genus Acer are susceptible to this disease (Table 1) including all maples that grow in Minnesota, box elder and sycamore trees. No species, or cultivars of the genus Acer (maples) have resistance to Eutypella canker, but no other shade trees are commonly affected by the disease.
 
Table 1. Maples affected by Eutypella canker
Common name
Scientific name
Black maple
Acer nigrum
Box elder
 Acer negundo
Norway maple
Acer platanoides
Red maple
Acer rubrum
Silver maple
Acer saccharinum
Sugar maple
Acer saccarum

Identification 
  • Cankers are typically within 9 feet of the ground, centered on branch stubs or wounds.
  • Young cankers are round to elliptical, slightly sunken or flattened and hidden behind bark.
  • Bark near the center of cankers that are 6 to 8 years old are darkened by black fungal fruiting bodies.
  • When bark is removed from the edge of the canker chalky white to tan colored mycelia (mats of fungal cells) can be seen.
  • On some tree species, canker edges are raised or appear swollen with a flattened or sunken center.
  • Bark falls off the face of old cankers, revealing a target shaped pattern of annual rings of cork wood.
  • Cankers can grow up to 5 feet long with age.
white coloring on tree trunk
Cream colored fungal mycelia at the edge of the canker.
Photo by M.Grabowski, UMN Extension

Biology
During rainy weather spores are ejected into the air from infected wood and can travel more than 75 feet on the wind. The fungus infects recently wounded or newly pruned small branches. Once in the tree, the fungus makes itself at home underneath the bark where it will penetrate into the wood and expand outward up to 1 inch per year. It kills the phloem (vascular cells that transport sugars from the leaves throughout the tree), the cambium (undeveloped cells that grow into new vascular cells) and can even invade and decay the sapwood of the tree. This decay can extend up to a foot into the tree and many trees infected with Eutypella canker break during strong storms and in high winds.
 
Each year during the growing season the tree will try to defend itself by creating a layer of wound wood around the edge of the canker. When the tree goes dormant for the season, the fungus breaks into this barrier and continues its progress. This back and forth growth can continue for decades. In very old cankers where the bark has finally sloughed off, rings of growth can be seen that reflect this annual battle between fungus and tree.
 
Management
close up of deformed tree trunk
 Black spore producing structures on the face of an old canker.
Photo by M.Grabowski, UMN Extension 
  • Avoid wounding the trunk or branches of susceptible hosts.
  • When pruning maples or other Acer spp. it is necessary to make the cut correctly. Avoid wounding the main trunk. Never leave a branch stub. For details on how to make correct pruning cuts visit here.
  • If a branch is infected, it should be pruned out and destroyed. Infected wood can be buried or burned (the fungus can produce spores even on dead wood).
  • Cankers on trunks cannot be pruned out but should be monitored. Because Eutypella parasitica is capable of causing wood decay, severely affected trees may be weakened and pose a risk of breaking and falling on property or people.
  • Contact a certified arborist to determine the stability of infected trees.
  • If healthy maples or other Acer spp. are located near a tree infected with Eutypella canker, it may be worthwhile to remove the infected tree to reduce the chances of pathogen spread. Spores of Eutypella parasitica are released from existing cankers and carried short distances by wind to infect new trees.

Thursday, November 2, 2017

Town & Country Garden Club 'Awesome Auction': Nov. 8

Let the Bidding Begin!
 
Town & Country Garden Club
16th Annual Awesome Auction
 
Wednesday, Nov. 8, 2017
11-2 p.m. (Social time starts at 10:30 a.m.)
 
Hope Valley Country Club
3803 Dover Road, Durham, NC 27707 
 
Luncheon now closed.
Stop by to bid and buy!