Invasive Pest Risk Maps
Phytophthora disease of alders - Phytophthora alni ssp alni
Phytophthora alni is a recently hybridized soil and waterborne pathogen causing root and collar rot of species of the genus Alnus (alder). Once introduced, the pathogen spreads naturally with streams, floods, and other drainage water.
Sample Areas were developed using the Susceptibility Surface. A total of 1,200 sample areas were assigned to one of four risk categories. Relative certainties were assigned to each category in order to create increasing plot intensifications for increasing risk stratums.
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|Survey Sample Area||466KB||4MB||2MB|
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Phytophthora alni (Website)