1. monocyclic
polycyclic

3. Agrios fig. 2-21

4. Myxomycetes – slime molds

5. Slime mold on turf – Physarum sp.

6. Sporangia of Physarum

8. Plasmodiophora brassicae
Club root of cabbage
Plasmodiophora brassicae

14. Plant Disease Cover Images Volume 87 (2003)
Spongospora subterranea
Powdery scab galls on
roots and stolons of potato
Obligate parasites
Vectors for viruses
Plant Disease Cover Images Volume 87 (2003)

16. Spore Type: Oospore
Oospores

17. hairy flagella

18. Hyphae of Oomycetes
Hypha

19. Oomycetes: Sexual Reproductive
Antheridium
Oospore
Oogonium

20. Oomycete: Antheridium and Oogonium
Hyphae
Antheridium
Oogonium

23. Asexual Reproductive Structures of Oomycetes
Sporangia

24. Zoospores Single cell, but membrane bound Product of mitosis
Released from sporangium
Motile
Not long lived
Zoospores
Sporangium

25. Sporangia Borne on Single or Branched Sporangiophores
Lemon to globose shaped
structures are sporangia

27. Zoospores attracted to infection court
Plant surface
Flagellum
Body of
zoospore