Ash yellows and defoliating insects related to decline of velvet ash in Zion National Park
Sinclair WA, Griffiths HM, Treshow M, Davis RE. 1994. Ash yellows and defoliating insects related to decline of velvet ash in Zion National Park. Park Science. 14(2):20–22
This article examines the possible causes and effects of ash yellows (AshY) disease in the velvet ashes of Zion National Park. Although park trees show infection by MLOs (mycoplasmalike organisms), this appears to be only a minor influence. The authors suggest that a more significant cause of the visible decline in mature ash trees may be insect defoliation, exacerbated for some individuals by water shortage. With 16 references.
- Type
- Journal Article
- Authors
- Sinclair, Wayne; Griffiths, Helen; Treshow, Michael; Davis, Robert
- Units
- NRSS , ZION
- Keywords
- Animal Studies, Animals, ash (Fraxinus), ash yellows, Disease, Human Impacts, Insects (Insecta), Invertebrates, Invertebrates (Invertebrata), MLO infection, Plant Communities, Plant Studies, Research & Studies, Trees, velvet ash, Water, Zion National Park