PLPA 2003 Final Exam – Study Guide, Practice Questions & Plant Pathology
Review 2026
Fungi - correct answer ✔✔what biotic disease causes the most damage to plants
Environment, Host, Pathogen - correct answer ✔✔what 3 components are required for disease
to occur
Immune system - correct answer ✔✔what do plants lack that humans have
Neolithic revolution - correct answer ✔✔what caused increased plant disease, dispersal
gradient, plant density, lowered plant diversity and irrigation
Theophrastus - correct answer ✔✔who was the father of botany
Coffee rust - correct answer ✔✔what is a fungal pathogen that causes severe defoliation even
death, devastated production in Sri Lanka and is the reason why English drink tea
Tulipmania - correct answer ✔✔in this period there were people paying lots of money in hope
to resell these flowers due to their beautiful color variation, occurred in the Netherlands
Anton De Bary - correct answer ✔✔who is the father of Plant Pathology and inoculated
potatoes
Chemical control - correct answer ✔✔Pierre Marie Alexis Millardet discovered what relating to
grapes, developed a solution of copper sulfate, lime and water (Bordeaux Mixture), still used
widely today
, Stem Rust - correct answer ✔✔this fungal pathogen affects wheat and has a narrow host range,
thrives well in wet climates, requires 2 different plant species to complete sexual life cycle,
plants can host thousands of pustules, each containing thousands of spores to be dispersed
through air currents
Robigus - correct answer ✔✔The Roman Rust God
Robigalla - correct answer ✔✔This celebration was used to bless the forthcoming growing
seasons and protect the crop, rust colored dogs were sacrificed
Elvin Stakman - correct answer ✔✔this man worked with trying to understand the stem rust
pathogen but resistance could not be met due to genetic variation
Harold Flor - correct answer ✔✔this man proposed gene to gene concept, allowed plant to
detect presence of pathogen, controlled death of attacked plant cell, prevents spreading, was
only effective against biotrophic pathogens
Barberry - correct answer ✔✔what bush was eradicated to prevent stem rust
Norman Borlaug - correct answer ✔✔who helped develop new dwarf varieties of wheat via
shuttle breeding, increased Mexico's crop exponentially, 1 billion people saved from starvation,
and won the Nobel Peace Prize in 1970
UG99 - correct answer ✔✔what new pathogen orginated Uganda in 1999, 85% of worldwide
wheat cultivars have no resistance, hasn't reached yet N. America or Europe/Asia
Late Blight of Potato - correct answer ✔✔devastated the Irish population, is a fungal-like
pathogen, infects potato and tomatoes, thrives in wet conditions and high humidity, tends to
cause symptoms later in season, wind dispersed, infects leaves and tubers, overwinters in
tubers, introduced by ships carrying bird guano(fertilizer)
Review 2026
Fungi - correct answer ✔✔what biotic disease causes the most damage to plants
Environment, Host, Pathogen - correct answer ✔✔what 3 components are required for disease
to occur
Immune system - correct answer ✔✔what do plants lack that humans have
Neolithic revolution - correct answer ✔✔what caused increased plant disease, dispersal
gradient, plant density, lowered plant diversity and irrigation
Theophrastus - correct answer ✔✔who was the father of botany
Coffee rust - correct answer ✔✔what is a fungal pathogen that causes severe defoliation even
death, devastated production in Sri Lanka and is the reason why English drink tea
Tulipmania - correct answer ✔✔in this period there were people paying lots of money in hope
to resell these flowers due to their beautiful color variation, occurred in the Netherlands
Anton De Bary - correct answer ✔✔who is the father of Plant Pathology and inoculated
potatoes
Chemical control - correct answer ✔✔Pierre Marie Alexis Millardet discovered what relating to
grapes, developed a solution of copper sulfate, lime and water (Bordeaux Mixture), still used
widely today
, Stem Rust - correct answer ✔✔this fungal pathogen affects wheat and has a narrow host range,
thrives well in wet climates, requires 2 different plant species to complete sexual life cycle,
plants can host thousands of pustules, each containing thousands of spores to be dispersed
through air currents
Robigus - correct answer ✔✔The Roman Rust God
Robigalla - correct answer ✔✔This celebration was used to bless the forthcoming growing
seasons and protect the crop, rust colored dogs were sacrificed
Elvin Stakman - correct answer ✔✔this man worked with trying to understand the stem rust
pathogen but resistance could not be met due to genetic variation
Harold Flor - correct answer ✔✔this man proposed gene to gene concept, allowed plant to
detect presence of pathogen, controlled death of attacked plant cell, prevents spreading, was
only effective against biotrophic pathogens
Barberry - correct answer ✔✔what bush was eradicated to prevent stem rust
Norman Borlaug - correct answer ✔✔who helped develop new dwarf varieties of wheat via
shuttle breeding, increased Mexico's crop exponentially, 1 billion people saved from starvation,
and won the Nobel Peace Prize in 1970
UG99 - correct answer ✔✔what new pathogen orginated Uganda in 1999, 85% of worldwide
wheat cultivars have no resistance, hasn't reached yet N. America or Europe/Asia
Late Blight of Potato - correct answer ✔✔devastated the Irish population, is a fungal-like
pathogen, infects potato and tomatoes, thrives in wet conditions and high humidity, tends to
cause symptoms later in season, wind dispersed, infects leaves and tubers, overwinters in
tubers, introduced by ships carrying bird guano(fertilizer)
