PLPA 2003 FINAL QUESTIONS WITH VERIFIED
ACCURATE ANSWERS
Which type of pathogen contributed to tulipmania? - Answers - Virus
Which of the following factors did NOT contribute to the devastation of Ceylons coffee
plantations in the 1800s? - Answers - Tropical climate that lacked a true winter
Fungicides were ineffective and poorly available
Coffee Rust
Large monoculture of coffee grown
Soil Erosion (CORRECT ANSWER)
After potatoes were observed not to suffer from the blight near the copper smelters in
Swansea, which theory was initially used to explain this phenomenon? - Answers - No
connection was made between the two.
Which individual was proved to be most incorrect when it came to their theories about
the cause of the Irish Potato Famine? - Answers - John Lindley
The authors of "Pests and diseases of prehistoric crops" reference a modern study
(Butser Experiments) that attempted to replicate Neolithic and Medieval Farming
techniques. What two factors does the author claim make it difficult to fully replicate the
yield outcomes which would have developed historically? - Answers - Use of fungicides
in neighboring fields might keep disease pressure low
Local strains of pathogens might not have been adapted to attack the crops grown at
Butser
What type of pathogen causes Ergot of Rye? - Answers - True Fungus
What is the best way to test for ergotism? - Answers - Urine Test
Which of the following industries was NOT mentioned as directly effected by the
chestnut blight epidemic? - Answers - Timber
Hog
Moonshine (CORRECT ANSWER)
Tanning
Which of the following is NOT considered a potential control measure for this disease? -
Answers - Deep tillage
What type of pathogen causes chestnut blight? - Answers - True fungus
What is best source of resistance for those trying to breed a resistant variety of
American chestnut? - Answers - China
ACCURATE ANSWERS
Which type of pathogen contributed to tulipmania? - Answers - Virus
Which of the following factors did NOT contribute to the devastation of Ceylons coffee
plantations in the 1800s? - Answers - Tropical climate that lacked a true winter
Fungicides were ineffective and poorly available
Coffee Rust
Large monoculture of coffee grown
Soil Erosion (CORRECT ANSWER)
After potatoes were observed not to suffer from the blight near the copper smelters in
Swansea, which theory was initially used to explain this phenomenon? - Answers - No
connection was made between the two.
Which individual was proved to be most incorrect when it came to their theories about
the cause of the Irish Potato Famine? - Answers - John Lindley
The authors of "Pests and diseases of prehistoric crops" reference a modern study
(Butser Experiments) that attempted to replicate Neolithic and Medieval Farming
techniques. What two factors does the author claim make it difficult to fully replicate the
yield outcomes which would have developed historically? - Answers - Use of fungicides
in neighboring fields might keep disease pressure low
Local strains of pathogens might not have been adapted to attack the crops grown at
Butser
What type of pathogen causes Ergot of Rye? - Answers - True Fungus
What is the best way to test for ergotism? - Answers - Urine Test
Which of the following industries was NOT mentioned as directly effected by the
chestnut blight epidemic? - Answers - Timber
Hog
Moonshine (CORRECT ANSWER)
Tanning
Which of the following is NOT considered a potential control measure for this disease? -
Answers - Deep tillage
What type of pathogen causes chestnut blight? - Answers - True fungus
What is best source of resistance for those trying to breed a resistant variety of
American chestnut? - Answers - China
