Promising treatment, control options for sudden oak death

Sudden oak death syndrome fells 3 oak species

Phosphite Injections and Bark Application of Phosphite + PentrabarkTM Control Sudden Oak Death in Coast Live Oak

In each of seven fully controlled experiments, potted California, U.S. coast live oak trees were artificially inoculated with Phytophthora ramorum, the agent of a tree disease commonly referred to as sudden oak death. Phosphites were applied to trees using a range of application approaches either as preventive or therapeutic treatments. Soil drenches and bark application of phosphites were inef...

WebGIS for Monitoring "Sudden Oak Death" in coastal California

Tanoak (Lithocarpus densiflorus), coast live oak (Quercus agrifolia), black oak (Q. kelloggii), and some shreve oak (Q. parvula var. shreve) trees in coastal California are affected by a new disease called ‘‘Sudden Oak Death.’’ These tree communities are extremely important for habitat provision, recreation, and aesthetics. Research of and community interest in this new disease is very high. We...

Balancing Detection and Eradication for Control of Epidemics: Sudden Oak Death in Mixed-Species Stands

Culling of infected individuals is a widely used measure for the control of several plant and animal pathogens but culling first requires detection of often cryptically-infected hosts. In this paper, we address the problem of how to allocate resources between detection and culling when the budget for disease management is limited. The results are generic but we motivate the problem for the cont...

Non-oak native plants are main hosts for sudden oak death pathogen in California

The finding of Phytophthora ramorum — the pathogen that causes sudden oak death in four California native trees — on rhododendron in Europe led us to hypothesize that its host range in California’s natural forests was much greater than previously suspected. In addition to the affected oak species, we have now identified an additional 13 species from 10 plant families that act as hosts for P. ra...