Chapter 3 - Ornamental and Turf Plant Diseases

Question 1

To control black spot of rose, a person should use a/an:

a. fungicide
b. bactericide
c. nematicide
d. insecticide

Answer 1

a. fungicide

Question 2

Powdery mildew is primarily a problem when the climate is:

a. warm and humid
b. cool and dry
c. warm and dry
d. cool and humid

Answer 2

b. cool and dry

Question 3

Plants affected by root knot nematodes grow poorly because roots:

a. rot quickly
b. cannot absorb enough water and nutrients
c. become susceptible to fungal organisms
d. mold and tip burn

Answer 3

b. cannot absorb enough water and nutrients.

Question 4

Oak wilt causes what kind of symptoms on leaves of live oak?

a. chlorosis and gall formation
b. tip burn and black spots
c. veinal chlorosis and tip burn
d. mold and tip burn

Answer 4

c. veinal chlorosis and tip burn

Question 5

A disease that commonly infects photinia and Indian hawthorn is:

a. phytopthora aerial blight
b. botrytis gray mold
c. downy mildew
d. entomosporium leaf spot

Answer 5

d. entomosporium leaf spot.

Question 6

A turfgrass disease caused by a virus and commonly confused with iron chlorosis is:

a. brown patch
b. bermudagrass smut
c. St. Augustine decline
d. rust

Answer 6

c. St. Augustine decline

Question 7

_____ _____ symptoms include rotted leaves easily pulled away from the plant.

a. fairy ring
b. brown patch
c. take-all patch
d. dollar spot

Answer 7

b. brown patch

Question 8

Bermudagrass smut can be controlled by fungicide applications.
true or false

Answer 8

false

Question 9

A common turfgrass disease resulting in leaf blades with light tan lesions and red borders near the edges of the infected area is:

a. brown patch
b. gray leaf spot
c. take-all patch
d. dollar spot

Answer 9

d. dollar spot

Question 10

This disease of bermudagrasses is not a problem in newly established lawns but can infect lawns 3 or 4 years old.

a. spring dead spot
b. bermudagrass smut
c. rust
d. fairy ring

Answer 10

a. spring dead spot