The Epidemiology of Sudden Oak Death Disease Caused by in a Mixed Bay Laurel-Oak Woodland Provides Important Clues for Disease Management.

Epidemiological models are important for the understanding of disease progression in plants and for the design of control strategies. , the pathogen responsible for the disease known as Sudden Oak Death, causes lethal infection on several oaks but relies on California bay laurels for transmission. Here, repeated surveys of bay laurels and oaks indicated that bay laurel disease incidence was positively correlated with rainfall, bay laurel density, and an eastern aspect, and negatively correlated with bay laurel basal area.

A Microsatellite Analysis Used to Identify Global Pathways of Movement of and the Likely Sources of Wildland Infestations in California and Mexico.

The genetic structure of a sample of isolates of the oomycete plant pathogen from natural and agricultural outbreaks and the long-distance movement of individual genotypes were studied using four microsatellite markers to genotype 159 isolates of Californian, Mexican, and worldwide origins. Allelic profiles identified 75 multilocus genotypes. A STRUCTURE analysis placed them in three groups characterized by different geographic and host ranges, different genic and genotypic diversity, and different reproductive modes.