2. • Lower Oomycets are entirely aquatic Eg. Achlya diffusa
Commonly found as saprophytes
Some parasite on algae
https://www.bcrc.firdi.org.tw/fungi/fungal_detail.jsp?id=FU201505260272
10. • Order -Saprolegniales
• generally saprophytic
• few species parasitic on higher plants and animals
• Saprolegnia has been known to affect a variety of
freshwater fish
https://aquariumscience.org/index.php/10-7-fish-saprolegnia/
11. • Order -Leptomitales
• Aquatic, saprotrophic, often found in polluted water;
• eucarpic; hyphae constricted, with cellulin plugs, arising
from a well-defined basal cell;
• oogonium typically containing a single egg, which may
be free or embedded in periplasm (a peripheral layer of
protoplasm);
• example genera
Apodachlyella, Ducellieria, Leptolegniella
12. • Order -Legenidiales
• an order of chiefly aquatic fungi (subclass Oomycetes) that are mostly
parasitic in algae and water molds
• that have a simple or somewhat branched holocarpic thallus
• Example genera – Lagenidium, Atkinsiella
Halioticida, Paralagenidium etc.,
13. • Order -Peronosporales
• Most economically important group in oomycetes
• Cause damage in economically important crops like Potato, Tomato, grapes,
cucumbers, and lettuce.
• Example genera includes Phytophthora, Phythium, Peronospora, Bremia,
Plasmopara
• Damping of fungi- Phythium sp
• White rust fungi- Albugo sp
