PCA PLANT PATHOGENS EXAMINATION
SCRIPT 2026 FULL TEST QUESTIONS AND
ANSWERS GRADED A+
◉ powdery mildews are caused by. Answer: funguses
◉ which of the following is a sign of a disease. Answer: white mycelium
on twigs and fruit
◉ some abiotic factors that cause plant disease are. Answer: air
pollutants
◉ which of the following biotic factors contribute to plant diesease.
Answer: viroids and viruses
◉ a non obliate parasite. Answer: can live on either a living or a dead
hosts
◉ kotch postulates are readily implemented for. Answer: fungi
◉ an example of human impact in the development in plant disease is.
Answer: the use of preventative fungicide applications
, ◉ anthracnose diseases cannot occur without. Answer: the presence of
the pathogen in the soil
◉ the use of pathogen free propagated material. Answer: only helps if
environmental conditions favorable for disease development are not
present
◉ plant disease triangle is used for the diagnosis because it allows you
to discount disease that. Answer: wounldn't occur under existing
environmental conditions
◉ which of the following factors affects epidemics. Answer: the
virulence of the pathogens
◉ dominant environmental factor in development in most epidemics
caused by fungi is. Answer: moisture
◉ in addition to host pathogen and environment another component that
affects the development of an epidemic is. Answer: the age of the host
plants
◉ which type of pathogen decimation method is responsible for most
frequent and most wide spread plant disease epidemics. Answer: air
borne
SCRIPT 2026 FULL TEST QUESTIONS AND
ANSWERS GRADED A+
◉ powdery mildews are caused by. Answer: funguses
◉ which of the following is a sign of a disease. Answer: white mycelium
on twigs and fruit
◉ some abiotic factors that cause plant disease are. Answer: air
pollutants
◉ which of the following biotic factors contribute to plant diesease.
Answer: viroids and viruses
◉ a non obliate parasite. Answer: can live on either a living or a dead
hosts
◉ kotch postulates are readily implemented for. Answer: fungi
◉ an example of human impact in the development in plant disease is.
Answer: the use of preventative fungicide applications
, ◉ anthracnose diseases cannot occur without. Answer: the presence of
the pathogen in the soil
◉ the use of pathogen free propagated material. Answer: only helps if
environmental conditions favorable for disease development are not
present
◉ plant disease triangle is used for the diagnosis because it allows you
to discount disease that. Answer: wounldn't occur under existing
environmental conditions
◉ which of the following factors affects epidemics. Answer: the
virulence of the pathogens
◉ dominant environmental factor in development in most epidemics
caused by fungi is. Answer: moisture
◉ in addition to host pathogen and environment another component that
affects the development of an epidemic is. Answer: the age of the host
plants
◉ which type of pathogen decimation method is responsible for most
frequent and most wide spread plant disease epidemics. Answer: air
borne
