By pruning during the winter months, gardeners can reduce the chance of infection.
, the middle of winter is the only time when we should consider doing any type of pruning of oak trees in order to reduce the potential for infection by the pathogen that causes oak wilt. Wounds caused by pruning cuts during the growing season attract an insect that spreads the disease, and by pruning during the winter months, we can avoid the potential “overland” spread of this disease.
The fungus invades the sapwood, which is the water-conducting tissue of the tree. In addition to its presence in the tree, the fungus also triggers a defense reaction by the tree to stop the fungal spread. This response by the tree interferes with water uptake from the tree roots upward to branches and leaves in the canopy of the tree. The result is wilting, where leaves turn brown from the tips, inward to the base of the leaf where it is attached to the branch.
, which are attracted to the smell of sap when oaks are pruned or wounded in some way. These beetles are active during the growing season, particularly in spring, when many homeowners take advantage of warmer weather to prune shade trees and other woody ornamentals. The fungus can also be spread from an infected tree to other nearby oaks that have roots grafted to each other underground. This typically occurs in locations where several mature oaks are growing close together in a forested setting such as a park or other wooded location. Single oaks in a home landscape are not susceptible to this underground mode of transmission.
France Dernières Nouvelles, France Actualités
Similar News:Vous pouvez également lire des articles d'actualité similaires à celui-ci que nous avons collectés auprès d'autres sources d'information.
SLO County braces for more flooding, slides and downed treesBy KAREN VELIE Just as San Luis Obispo County is cleaning up from Monday's atmospheric river, more rain is on the way. The rain is slated to arrive early
Lire la suite »
SoCal crews still clearing roads, restoring power from downed trees as another storm moves inA downed tree in Brentwood left hundreds of Los Angeles Department of Water and Power customers in the dark Friday.
Lire la suite »
Storms take a heavy toll on San Francisco’s treesThe parade of atmospheric rivers destroyed some of San Francisco’s oldest residents. As jessicawolfrom reports, they could take generations to return.
Lire la suite »
California’s Lost TreesAfter the current storms end, California will face a new challenge: restoring an already diminished urban canopy. awalkerinLA reports
Lire la suite »