Downer Fightinging Phytophthora 08

•

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2008 APS meeting, Phytophthora Workshop

Technologie Formation

Alternative Management Tactics
for Combating Soilborne
Phytophthora Diseases
Jim Downer
University of California Cooperative Extension
Ventura, CA 91003
ajdowner@ucdavis.edu

Avocado Root Rot

Phytophthora: symptoms

Generalized Phytophthora
Life History

Phytophthora spore stages

Zoosporangia/spores Chlamydospores Zoospore cysts

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

Downer Fightinging Phytophthora 08

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Downer Fightinging Phytophthora 08

1. Alternative Management Tactics for Combating Soilborne Phytophthora Diseases Jim Downer University of California Cooperative Extension Ventura, CA 91003 ajdowner@ucdavis.edu

2. Avocado Root Rot

3. Phytophthora: symptoms

4. Generalized Phytophthora Life History

5. Phytophthora spore stages Zoosporangia/spores Chlamydospores Zoospore cysts