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- Ceratocystis fagacearum Cet article est une ébauche concernant les champignons. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Ceratocystis fagacearum Vue aérienne d'une forêt atteinte du flétrissement du chêne Espèce Ceratocystis fagacearum (1956) Le flétrissement américain du chêne est une maladie cryptogamique provoquée par le champignon Ceratocystis fagacearum qui attaque toutes les espèces de chênes en Amérique du Nord et plus particulièrement les chênes rouges. Les symptômes, variables selon les espèces d'arbres, comprennent généralement la décoloration des feuilles, le flétrissement, la défoliation et la mort de l'arbre. Le champignon se propage par l'intermédiaire d'insectes vecteurs ou par des connexions entre les racines des arbres. La gestion de la maladie consiste principalement en action de prévention de l'infection, en évitant les blessures des arbres, en détruisant les arbres malades et en creusant des tranchées destinées à supprimer les contacts au niveau des racines. Des traitements chimiques sont disponibles et sont pour la plupart préventifs. Le flétrissement du chêne est une maladie importante aussi bien en sylviculture pour la production de bois que dans les plantations ornementales en zone urbaine. (fr)
- Oak wilt is a fungal disease caused by the organism Bretziella fagacearum that threatens Quercus spp. The disease is limited to the Midwestern and Eastern United States; first described in the 1940s in the Upper Mississippi River Valley. The pathogen penetrates xylem tissue, preventing water transport and causing disease symptoms. Symptoms generally consist of leaf discoloration, wilt, defoliation, and death. The disease is dispersed by insect vectors and to adjacent trees through underground root networks. However, human spread is the most consequential dispersal method. Moving firewood long distances can potentially transport diseases and invasive species. (en)
- Ceratocystis fagacearum è un fungo ascomicete dell'ordine . Esemplare di quercia infettata dal fungo Questo fungo provoca una malattia fungina che può uccidere una quercia. I sintomi della malattia variano da specie a specie, ma generalmente in tutte si arriva alla morte, alla defogliazione e decolorazione delle foglie. Il fungo si sviluppa su alberi sani grazie a insetti vettori o tramite connessione con le radici dell'albero. Per gestire la malattia bisogna soprattutto prevenire l'infezione in modo da evitare ferite all'albero come scavare trincee che ostacolano la connessione del fungo con la radice. Sono disponibili anche trattamenti chimici. (it)
- Ceratocystis fagacearum är en svampart som först beskrevs av Bretz, och fick sitt nu gällande namn av J. Hunt 1956. Ceratocystis fagacearum ingår i släktet Ceratocystis och familjen Ceratocystidaceae. Inga underarter finns listade i Catalogue of Life. (sv)
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- 44990 (xsd:nonNegativeInteger)
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- Close up of spore mat stage III (en)
- Photograph of dead tree trunk (en)
- Photograph of person pointing to spore mat (en)
- Photograph of red oak leaves on the ground in July (en)
- Root graft of hardwood tree after excavation following vibratory plowing (en)
- Photograph of leaf and whole tree symptoms of oak wilt in a red oak tree (en)
- Illustration of the oak wilt disease cycle by Julie Martinez (en)
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- Z.W. de Beer, Marincowitz, T.A. Duong & M.J. Wingfield (en)
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- Aerial photograph of an oak wilt center (en)
- Excavated root graft (en)
- Oak wilt symptoms (en)
- Spore mat (en)
- Sudden leaf drop (en)
- Wood caramel colored, spore mats stage III is infectious (en)
- Spore mats stage IV – V are no longer infectious (en)
- Top cycle. Overland Spread .
* Spores germinate and infect oak tree.
* Infection spreads throughout the tree and leaf symptoms develop. Discoloration develops in the vacular tissue.
* Tree dies.
* Fungal pressure pads and spore-bearing mats form under bark.
* Nitidulids feed in pads and emerge with spores in and on their bodies.
* Nitidulids visit fresh wounds on healthy oak and deposit spores.
Bottom cycle. Root graft Spread .
* Fungal spore move through grafted roots into adjacent uninfected trees.
* Healthy tree becomes infected. (en)
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- Bretziella fagacearum (en)
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| dbp:distribution
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- Q1991788 (en)
- Q99224441 (en)
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- Oak Wilt cycle.gif (en)
- Oak wilt symptoms.jpg (en)
- Root Graft.png (en)
- SpMatClose.jpg (en)
- Spore_Mats_Stage_IV-V.jpg (en)
- The Real Dr Spore Mat.jpg (en)
- Oak_Wilt_Dropped_Leaves_Polk_County_WI_Noon_July_14,_2016.png (en)
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- Spores produced by the oak wilt fungus Endoconidia Conidiophore (en)
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- Bretziella fagacearum (en)
- Oak wilt (en)
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- Prevent the spread of invasive species and diseases
* Don't take firewood with you on your camping trip, RV adventure, or to your hunting camp.
* Don't bring firewood back from your second home to your place in the suburbs.
* Buy firewood near where you will burn it, or gather firewood on site when permitted.
** A good rule of thumb is only using wood that was cut within 50 miles of where you'll have your fire.
* Certified heat-treated firewood is safe to move long distances.
* Aged or seasoned wood is still not safe.
** Just because it is dry doesn't mean that bugs can't crawl onto it- and some insects can take several years to mature inside the wood.
** Wood that looks clean and healthy can still have tiny insect eggs, or microscopic fungi spores, that will start a new and deadly infestation. (en)
- Early detection and prompt action are essential for successful management of oak wilt.
The specific measures taken depend on several circumstances but should include appropriate combinations of the following:
* Prevent New Infections
** Remove and dispose of oak wilt-infected red oaks immediately.
** Avoid wounding oak trees, including pruning from,
*** February through June in Texas.
*** April through October in the Mid-West.
** Sterilize/sanitize all pruning equipment between trees.
** Paint all wounds and fresh stumps immediately regardless of season.
** Handle oak firewood cautiously, burn all firewood before spring, and never store unseasoned oak wood from infected trees near healthy oaks.
** Cover unseasoned firewood with clear plastic and bury the edges of the plastic.
* Diversify Your Landscape
** Plant trees that are native and/or adapted to your area.
** Favor a diversity of tree species.
** Avoid wounding oaks during planting.
* Stop Spread through Root Connections
** Install a trench at least 4 ft deep and 100 ft beyond the perimeter of infection centers to break up root connections.
** Cut or uproot all trees within the 100-ft barrier .
* Inject High-Value Oaks with Fungicide
** Identify susceptible, high-value oak trees in proximity to expanding oak wilt infection centers.
** Consult a trained and licensed arborist for treatment of susceptible trees with injections of propiconazole. (en)
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- OakWilt2017Counties.pdf (en)
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- USA counties with oak wilt (en)
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- leaf discoloration, wilt, defoliation and death (en)
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- * Chalara quercina
* Endoconidiophora fagacearum
*Thielaviopsis quercina
*Ceratocystis fagacearum (en)
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| dbp:taxon
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- Bretziella fagacearum (en)
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| dbp:title
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- Oak Wilt Management Quick Guide (en)
- Oak wilt disease cycle (en)
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- 300 (xsd:integer)
- 400 (xsd:integer)
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- Oak wilt is a fungal disease caused by the organism Bretziella fagacearum that threatens Quercus spp. The disease is limited to the Midwestern and Eastern United States; first described in the 1940s in the Upper Mississippi River Valley. The pathogen penetrates xylem tissue, preventing water transport and causing disease symptoms. Symptoms generally consist of leaf discoloration, wilt, defoliation, and death. The disease is dispersed by insect vectors and to adjacent trees through underground root networks. However, human spread is the most consequential dispersal method. Moving firewood long distances can potentially transport diseases and invasive species. (en)
- Ceratocystis fagacearum è un fungo ascomicete dell'ordine . Esemplare di quercia infettata dal fungo Questo fungo provoca una malattia fungina che può uccidere una quercia. I sintomi della malattia variano da specie a specie, ma generalmente in tutte si arriva alla morte, alla defogliazione e decolorazione delle foglie. Il fungo si sviluppa su alberi sani grazie a insetti vettori o tramite connessione con le radici dell'albero. Per gestire la malattia bisogna soprattutto prevenire l'infezione in modo da evitare ferite all'albero come scavare trincee che ostacolano la connessione del fungo con la radice. Sono disponibili anche trattamenti chimici. (it)
- Ceratocystis fagacearum är en svampart som först beskrevs av Bretz, och fick sitt nu gällande namn av J. Hunt 1956. Ceratocystis fagacearum ingår i släktet Ceratocystis och familjen Ceratocystidaceae. Inga underarter finns listade i Catalogue of Life. (sv)
- Ceratocystis fagacearum Cet article est une ébauche concernant les champignons. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Ceratocystis fagacearum Vue aérienne d'une forêt atteinte du flétrissement du chêne Espèce Ceratocystis fagacearum (1956) (fr)
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- Ceratocystis fagacearum (it)
- Flétrissement américain du chêne (fr)
- Oak wilt (en)
- Ceratocystis fagacearum (sv)
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