Life Cycle of Phytophthora ramorum - Forest Phytophthoras of the ...

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Summary of genotypic diversity of Phytophthora ramorum in Washington state • EU1 and NA2 have been detected more often since 2007 and NA1 detections have decreased • P. ramorum has not undergone sexual recombination in Washington state – Despite multiple instances of compatible mating types occurring in the same plant or soil bait • In repeat nurseries, both scenarios have occurred: – Persistence of the same genotype over multiple years, possibly indicating the Confirmed Nursery Protocol is not completely effective – Different genotypes each year, indicating multiple introduction events
How P. ramorum spreads • Water: wind‐driven rain, irrigation, runoff • Humans: soil on hiker’s boots and bicycle tires, nursery plants • Wildlife
Page 1 and 2: Life Cycle of Phytophthora ramorum
Page 3 and 4: Phytophthora is not a fungus Eukary
Page 5 and 6: Some economically important species
Page 7 and 8: Chlamydospore germination after 24
Page 9 and 10: Zoospores Zoospore release is stimu
Page 11 and 12: P. ramorum genetics • Two mating
Page 13 and 14: P. ramorum genotypes Percent of sam
Page 15: Genotype analysis Repetitive elemen
Page 19 and 20: Spread by animal vectors Snails - c
Page 21 and 22: Foliar hosts Epidemiologically impo
Page 23 and 24: The soil phase of P. ramorum • Pr
Page 25 and 26: Water Possible pathway in water: De
Page 27 and 28: Some invasive plants are low risk f
Page 29 and 30: Results of t-tests on F1 scores fro
Page 31 and 32: Other oomycete species found in soi
Page 33 and 34: Clade 6 Phytophthoras • Soilborne
Page 35 and 36: Clade K Pythiums Intermediate betwe
Page 37 and 38: Nursery Critical Control Points Inc
Page 39 and 40: Clean pots Steam sterilize or hot w
Page 42 and 43: P. ramorum can often be found in ru
Page 44 and 45: Organic soil treatments • Mulches
Page 46 and 47: On the web • Visit our website: h

Life Cycle of Phytophthora ramorum - Forest Phytophthoras of the ...

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