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4 Cards in this Set
- Front
- Back
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Dutch Elm Disease |
discovered in netherlands-1920s introduced into U.S. in late 1920s-30s Reintroduced back to Europe 1960s Ophiostoma Ulmi-Eurasian Strain Ophiostoma noro-ulmi=american strain Vectors=european elm beetle native american elm bark beetle |
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Oak Wilt |
red oak->very susceptible white oaks-> less susceptible fungal mats->attracts beetles vascular discoloration->tyloses, vessel plugging Vectors->nitulidae beetle-> not effective vectors |
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Verticillium Wilt of Maple |
soil borne fungus most common and damaging on maple microsclerotia symptoms=wilt, green vascular discoloration no sexual state asexual-> shorted conidiophores improve tree vigor |
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Laurel Wilt |
Brought to Georgia in 2002 with Ambrosia Bettle sticky spores, yeast like stage very similar to ophiostoma beetles have symbiotic relationship with fungus jumping to new hosts and vectors black discoloration in vascular tissue |
