PCA PLANT PATHOGENS EXAM NEWEST

PCA PLANT PATHOGENS EXAM NEWEST

COMPLETE 100 QUESTIO NS AND

CORRECT DETAILED ANS WERS

(VERIFIED ANSWERS) |ALREADY

GRADED A+

Question :

plant pathogens can be

Correct Answer:

a factor in integrated pest management for controlling insects and mites

Question :

powdery mildews are caused by

Correct Answer:

funguses

Question :

which of the following is a sign of a disease

Correct Answer:

white mycelium on twigs and fruit

Question :

some abiotic factors that cause plant disease are

Correct Answer:

air pollutants

Question :

which of the following biotic factors contribute to plant diesease

Correct Answer:

viroids and viruses

Question :

a non obliate parasite

Correct Answer:

can live on either a living or a dead hosts

Question :

kotch postulates are readily implemented for

Correct Answer:

fungi

Question :

an example of human impact in the development in plant disease is

Correct Answer:

the use of preventative fungicide applications

Question :

anthracnose diseases cannot occur without

Correct Answer:

the presence of the pathogen in the soil

Question :

the use of pathogen free propagated material

Correct Answer:

only helps if environmental conditions favorable for disease development are not present

Question :

plant disease triangle is used for the diagnosis because it allows you to discount disease that

Correct Answer:

wounld't occur under existing environmental conditions

Question :

which of the following factors affects epidemics

Correct Answer:

the virulence of the pathogens

Question :

dominant environmental factor in development in most epidemics caused by fungi is

Correct Answer:

moisture

Question :

in addition to host pathogen and environment another component that affects the development of an epidemic is

Correct Answer:

the age of the host plants

Question :

which type of pathogen decimation method is responsible for most frequent and most wide spread plant disease epidemics

Correct Answer:

air borne

Question :

most soil born diseases are

Correct Answer:

single cycled diseases

Question :

serious epidemics are more likely to occur from a multiple cycled disease rather than a single cycled disease because

Correct Answer:

multiple cycled diseases produce secondary inoculum that can cause secondary infections

Question :