Phytophthora in the Forest
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- Lee Mathews
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1 Phytophthora in the Forest Main Points: The Phytophthora Disease Cycle Invasive and native pathogens P. cinnamomi, P. lateralis, P. ramorum WHAT IS NEXT?
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3 WATER MOLDS PHYTOPHTHORA SPORANGIA RELEASE ZOOSPORES
4 OOSPORES AND CHLAMYDOSPORES FOR SURVIVING DRY TIMES
5 Phytophthora species Forest Plants Forest Soil alni uniformis cactorum cambivora cinnamomi cryptogea europaea gallica gonapodyides gregata hydropathica ilicis lateralis megasperma multivora nemorosa nicotianae pini plurivora pseudosyringae pseudotsugae psychrophyla ramorum riparia sansomeana siskiyouensis syringae taxon ceanothus taxon morella taxon oaksoil taxon pgchlamydo taxon pluvialis Forest Streams Cultivated and Urban a MANY SPECIES IN OREGON Host and Habitat Index for Phytophthora in Oregon forests (32 Species!) E journal: Forest Phytophthoras, ISSN:
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8 Invasive Forest Phytophthoras Phytophthora agathadicida Phytophthora obrutafolia Phytophthora tentaculata Phytophthora bilorbang Phytophthora lateralis Port Orford Cedar Root Disease Phytophthora ramorum Sudden Oak Death Phytophthora cinnamomi Jarrah dieback
9 PHYTOPHTHORA CINNAMOMI- AUSTRALIA
10 CORK OAK DECLINE - PORTUGAL
11 PATHOGEN HOSTS SUBSTRATE SPREAD ORIGIN? P. cinnamomi Many hosts Root nibbler Soil SE Asia P. lateralis POC Root and stem lesions Soil and streams E. Asia P. ramorum Tanoak (and many others) Leaf and twig lesions Airborne and splash?asia?
12 PATHOGEN HOSTS SUBSTRATE SPREAD ORIGIN? P. cinnamomi Many hosts Root nibbler Soil SE Asia P. lateralis POC Root and stem lesions Soil and streams E. Asia P. ramorum Tanoak (and many others) Leaf and twig lesions Airborne and splash?asia?
13 PHYTOPHTHORA LATERALIS PORT-ORFORD- CEDAR CHAMAECYPARIS LAWSONIANA
14 BANDON OREGON
15 POC YEW
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20 Scotland, Green et al. Taiwan, Brasier et al.
21 Aerial infections CADUCOUS
22 PATHOGEN HOSTS SUBSTRATE SPREAD ORIGIN? P. cinnamomi Many hosts Root nibbler Soil SE Asia P. lateralis POC Root and stem lesions Soil and streams E. Asia P. ramorum Tanoak (and many others) Leaf and twig lesions Airborne and splash?asia?
23 SUDDEN OAK DEATH Fagaceae SHOOT DIEBACK Ericaceae Some conifers THREE DISEASES LEAF BLIGHT Many diverse hosts
24 Leaf symptoms on Umbellularia Shoot dieback of Conifers
25 TANOAK - LITHOCARPUS DENSIFLORUS
26 Phytophthora ramorum Deciduous Sporangia
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28 CHLAMYDOSPORES
29 CANOPY INFECTION
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33 Splash dispersal and stem flow Landscape-level spread Airborne Long-distance spread Nursery Stock
34 Distance from recently killed tanoaks to the nearest tanoak killed in a previous year ( ) trees distance (m)
35 Landscape Distribution Ebba Peterson ROADS STREAMS frequency frequency Median distance Median distance
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38 Washington Nursery Oregon nursery Oregon forest California Forest and Nursery
39 WHAT S NEXT? Early spring 2015 Phytophthora pluvialis Red Needle Cast of Douglas-fir
40 PATHOGEN HOSTS SUBSTRATE SPREAD ORIGIN? P. cinnamomi Many hosts Root nibbler Soil SE Asia P. lateralis POC Root and stem lesions Soil and streams E. Asia P. ramorum Tanoak (and many others) Leaf and twig lesions Airborne and splash?asia? P. pluvialis Douglas -fir Needle cast Airborne and splash?oregon?
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42 September Nortons
43 R HI ZOCTONI A BUTI NI I WEBBLIGHT
44 THANK YOU Oregon colleagues
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