Weeds are plants that grow where they are not wanted, disrupting turf grass uniformity. a. True
b. False - ANSWER-a
Barnyard grass is considered a dicot
a. true
b. false - ANSWER-b
Which of the following statements is not true?
a. Biennial weeds require two years to complete their life cycle
b. Perennial weeds live only three years
c. Annual weeds can germinate in spring and fall
d. Annuals and perennial include grass and broadleaf weeds - ANSWER-b
Which of the following cultural practices can have the most impact on controlling annual weeds?
a. fertility
b. irrigation
c. aeration
d. mowing - ANSWER-d
Which of the following statements is not true?
a. pre-emergence herbicides should be applied before weed seed germination
b. post-emergence herbicides are best applied to young weed seedlings
c. pre-emergence herbicides are best used for annual weed control
d. post-emergence herbicides require 1/2 inch of water to activate control - ANSWER-d
What type of herbicide best controls perennial weeds?
a. contact herbicide
b. selective herbicide
c. system herbicide
d. pre-emergence herbicide - ANSWER-c
What is the ideal temperature range in which to apply herbicides?
a. Greater than 85 ℉
b. 60-80℉
c. 55-65℉
d. 75-95℉ - ANSWER-b
Which of the following weeds is not an annual?
a. prostrate knotweed b. barnyard grass
c. mouse-ear chickweed
d. spurge - ANSWER-c
Which grassy weed spreads by rhizomes?
a. bermuda grass
b. yellow nutsedge
c. goosegrass d. annual bluegrass - ANSWER-a
Which of the following weeds is a perennial?
a. quack grass
b. plantain
c. wild garlic
d. nimble will
e. all of the above - ANSWER-e
The first best step for the management of turf grass diseases is to select resistant species or varieties of turf grass seed.
a. true
b. false - ANSWER-a
A plant disease is any infectious or noninfectious disorder that alters normal growth and development on a periodic basis.
a. true
b. false - ANSWER-b
What is needed for a plant disease to develop?
a. a susceptible host
b. a resistant host
c. a pathogen and favorable weather
d. both a and c - ANSWER-d
Abiotic disorders of plant diseases include:
a. poor cultural practices
b. soil compaction
c. severe drought
d. all of the above - ANSWER-d
Chemicals that control plant diseases are called:
a. insecticides b. miticides
c. herbicides
d. fungicides - ANSWER-d
Which of these diseases has a pathogen that infects foliage?