PCA - Plant Pathogens Exam
Complete Questions and Guide Answers
100% Verified Graded A+
1. plant pathogens can be
Answer: a factor in integrated pest management for controlling insects and mites
2. powdery mildews are caused by
Answer: funguses
3. which of the following is a sign of a disease
Answer: white mycelium on twigs and fruit
4. some abiotic factors that cause plant disease are
Answer: air pollutants
5. which of the following biotic factors contribute to plant diesease
Answer: viroids and viruses
, 6. a non obliate parasite
Answer: can live on either a living or a dead hosts
7. kotch postulates are readily implemented for
Answer: fungi
8. an example of human impact in the development in plant disease is
Answer: the use of preventative fungicide applications
9. anthracnose diseases cannot occur without
Answer: the presence of the pathogen in the soil
10. the use of pathogen free propagated material
Answer: only helps if environmental conditions favorable for disease development are not present
11. plant disease triangle is used for the diagnosis because it allows you to
discount disease that
Answer: wounldn't occur under existing environmental conditions
12. which of the following factors affects epidemics
Answer: the virulence of the pathogens
13. dominant environmental factor in development in most epidemics caused
by fungi is
Answer: moisture
Complete Questions and Guide Answers
100% Verified Graded A+
1. plant pathogens can be
Answer: a factor in integrated pest management for controlling insects and mites
2. powdery mildews are caused by
Answer: funguses
3. which of the following is a sign of a disease
Answer: white mycelium on twigs and fruit
4. some abiotic factors that cause plant disease are
Answer: air pollutants
5. which of the following biotic factors contribute to plant diesease
Answer: viroids and viruses
, 6. a non obliate parasite
Answer: can live on either a living or a dead hosts
7. kotch postulates are readily implemented for
Answer: fungi
8. an example of human impact in the development in plant disease is
Answer: the use of preventative fungicide applications
9. anthracnose diseases cannot occur without
Answer: the presence of the pathogen in the soil
10. the use of pathogen free propagated material
Answer: only helps if environmental conditions favorable for disease development are not present
11. plant disease triangle is used for the diagnosis because it allows you to
discount disease that
Answer: wounldn't occur under existing environmental conditions
12. which of the following factors affects epidemics
Answer: the virulence of the pathogens
13. dominant environmental factor in development in most epidemics caused
by fungi is
Answer: moisture
