PLPA 200 Exam Review (UIUC) – Study Guide, Practice Questions & Plant
Pathology Prep 2026
The scientist who proved that a fungus was the cause of the potato blight is - correct answer
✔✔Anton Debary
The potato plant is closely related to - correct answer ✔✔Tomatoes
The plant disease pyramid can be used to help you remember the four factors required for a
plant disease to occur. What are the four parts of the plant disease pyramid? - correct answer
✔✔Environment, pathogen, host, and Time
What are the three components of the plant disease triangle? - correct answer
✔✔Environment, pathogen, and host
The nuclei in the vegetative mycelium of a fungus may be - correct answer ✔✔all of the others
Diploid, haploid, Dikaryotic, Membrane Bound
A mycelium is composed of - correct answer ✔✔threadlike hyphae
The term for the sexually formed spores produced by species of Phytophthora, Pythium, and
Plasmopara is - correct answer ✔✔Oospore
Oomycetes are different from (other) fungi because - correct answer ✔✔their cell walls contain
cellulose
Phytophthora infestans, the fungus that causes late blight of potato, survives througuh the
winter primarily as - correct answer ✔✔Mycelium in infected potato tuber
, The downy mildew pathogen spreads from grape plant to grape plant during the growing
season as - correct answer ✔✔wind-blown or rain-slashed sporangia
The center of origin of coffee rust is believed to be - correct answer ✔✔Ethiopia
The center of origin of the coffee plant is - correct answer ✔✔Ethiopia
Native Central American Indians used rubber for - correct answer ✔✔all of the others
The quarantine against coffee rust in Central and South America - correct answer ✔✔prevented
coffee rust in the region for over 100 years
Which of the following statements is FALSE? - correct answer ✔✔Abiotic diseases are infectious.
When a plant loses too much water through its stomates, it will become - correct answer
✔✔wilted
Acid rain is defined as any rainfall with a pH value - correct answer ✔✔less than 5
The environmental factor that adversely affects plant growth most commonly is - correct answer
✔✔excess or deficiencies of water
Symptoms of pesticide injury are most commonly caused by - correct answer ✔✔herbicides
symptoms of abiotic plant diseases - correct answer ✔✔can be confused with those caused by
biotic agents
Pathology Prep 2026
The scientist who proved that a fungus was the cause of the potato blight is - correct answer
✔✔Anton Debary
The potato plant is closely related to - correct answer ✔✔Tomatoes
The plant disease pyramid can be used to help you remember the four factors required for a
plant disease to occur. What are the four parts of the plant disease pyramid? - correct answer
✔✔Environment, pathogen, host, and Time
What are the three components of the plant disease triangle? - correct answer
✔✔Environment, pathogen, and host
The nuclei in the vegetative mycelium of a fungus may be - correct answer ✔✔all of the others
Diploid, haploid, Dikaryotic, Membrane Bound
A mycelium is composed of - correct answer ✔✔threadlike hyphae
The term for the sexually formed spores produced by species of Phytophthora, Pythium, and
Plasmopara is - correct answer ✔✔Oospore
Oomycetes are different from (other) fungi because - correct answer ✔✔their cell walls contain
cellulose
Phytophthora infestans, the fungus that causes late blight of potato, survives througuh the
winter primarily as - correct answer ✔✔Mycelium in infected potato tuber
, The downy mildew pathogen spreads from grape plant to grape plant during the growing
season as - correct answer ✔✔wind-blown or rain-slashed sporangia
The center of origin of coffee rust is believed to be - correct answer ✔✔Ethiopia
The center of origin of the coffee plant is - correct answer ✔✔Ethiopia
Native Central American Indians used rubber for - correct answer ✔✔all of the others
The quarantine against coffee rust in Central and South America - correct answer ✔✔prevented
coffee rust in the region for over 100 years
Which of the following statements is FALSE? - correct answer ✔✔Abiotic diseases are infectious.
When a plant loses too much water through its stomates, it will become - correct answer
✔✔wilted
Acid rain is defined as any rainfall with a pH value - correct answer ✔✔less than 5
The environmental factor that adversely affects plant growth most commonly is - correct answer
✔✔excess or deficiencies of water
Symptoms of pesticide injury are most commonly caused by - correct answer ✔✔herbicides
symptoms of abiotic plant diseases - correct answer ✔✔can be confused with those caused by
biotic agents
