C2 - Pest Identification Flashcards
What are the six groups of MB pests called?
Virus Bacteria Slime Algae Fungi Mold
Key traits of Viruses
Can only multiply in a host - uncommon
Key traits of Bacteria
Single cell Microscopic Lack chlorophyll Reproduce by division Some are aerobic (require air), some anaerobic
Most common-Related to many problems in water systems
All grow in 68-104 degrees F, some as broad as 50-158. Require pH of 4 to 8, ideal 7.4.
Create odor, slime (byproduct of metabolic process), create acid which corrodes process equipment, impede flow
Key traits of Algae
Simple plants without roots, stems or leaves
Require water and sunlight (for photosynthesis to create food)
One cell is invisible but link together to form strands.
Grow best in pH of 5.5 to 9, 86-95 degrees
Common in open air systems
Impede heat transfer, clog pipes, form large masses where additional MB will grow
Key traits of Fungi
Saprophytes or parasites
Plant like, but no leaves, stem or roots but require water and oxygen (found only above water)
Reproduce by spores
Found in systems using wood
Two groups, filamentis fungi (mold) and yeast
Both groups like pH 2-8 (5.6 ideal) and temp of 32-100
Degrade wood (paper) quality
Key traits of slime
Gelatinous mass
Similar to algae but does not require sunlight
Four phases of microbes
Lag phase
Log phase
Stationary phase
Death phase
