1|Page
PCA PLANT PATHOGENS EXAM LATEST 2025 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
Which of the following can be used to detect a viral pathogen -
ANSWER-electron microscope
Which of the following viruses is not transmitted by aphids -
ANSWER-beet curly top gemini virus
In plants such as those in the photos that have been infected for
several weeks, the pathogen is - ANSWER-found systemically
throughout the plant
The photo illistrate a very important fungal disease in apples.
What is common and scientific name of the disease - ANSWER-
apple scab
The disease depicted in the above photo causes all of the
following except - ANSWER-branch die back
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What is one of the most stable viruses that is easily trasnmitted
mechanically and becomes problematic with poor green house
sanitaiion? - ANSWER-tobacco mosaic virus
What is the difference between dwarf mistletoe and leafy
mistletoe - ANSWER-dwarf attacks only conifers and leafy
mistletoe attacks many wooden species
Symptoms of plants suffering from a lack of moisture include all
the following except - ANSWER-stem cankers
Numerous small bumps on the lower sides of leaves or on stems
is a common symptom of - ANSWER-edema
Symptoms of iron deficiency include - ANSWER-chlorosis of the
under leaves
The disease in the photograph is what? - ANSWER-peirce
disease of grapes is a bacteria
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What causes the marginal leaf scorching in the photos above -
ANSWER-plugging of the vines xylem tissue
Plants in the above photo have typical symptoms of an infection
by? - ANSWER-viruses
Pathogens responsible for the symptoms in the photo are most
likely - ANSWER-obligate parasites
What is the common name of the disease that affect the plant
parts in the photograph - ANSWER-late blight of potatoes
What pathogen causing the disease in the photograph is a -
ANSWER-fungus (club root)
Grape fan leaf virus - ANSWER-reduces fruit production
Lettuce mosaic potyvirus - ANSWER-has a very wide host range
PCA PLANT PATHOGENS EXAM LATEST 2025 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
Which of the following can be used to detect a viral pathogen -
ANSWER-electron microscope
Which of the following viruses is not transmitted by aphids -
ANSWER-beet curly top gemini virus
In plants such as those in the photos that have been infected for
several weeks, the pathogen is - ANSWER-found systemically
throughout the plant
The photo illistrate a very important fungal disease in apples.
What is common and scientific name of the disease - ANSWER-
apple scab
The disease depicted in the above photo causes all of the
following except - ANSWER-branch die back
,2|Page
What is one of the most stable viruses that is easily trasnmitted
mechanically and becomes problematic with poor green house
sanitaiion? - ANSWER-tobacco mosaic virus
What is the difference between dwarf mistletoe and leafy
mistletoe - ANSWER-dwarf attacks only conifers and leafy
mistletoe attacks many wooden species
Symptoms of plants suffering from a lack of moisture include all
the following except - ANSWER-stem cankers
Numerous small bumps on the lower sides of leaves or on stems
is a common symptom of - ANSWER-edema
Symptoms of iron deficiency include - ANSWER-chlorosis of the
under leaves
The disease in the photograph is what? - ANSWER-peirce
disease of grapes is a bacteria
, 3|Page
What causes the marginal leaf scorching in the photos above -
ANSWER-plugging of the vines xylem tissue
Plants in the above photo have typical symptoms of an infection
by? - ANSWER-viruses
Pathogens responsible for the symptoms in the photo are most
likely - ANSWER-obligate parasites
What is the common name of the disease that affect the plant
parts in the photograph - ANSWER-late blight of potatoes
What pathogen causing the disease in the photograph is a -
ANSWER-fungus (club root)
Grape fan leaf virus - ANSWER-reduces fruit production
Lettuce mosaic potyvirus - ANSWER-has a very wide host range
