Score ______________ / 30

Quiz #6

Multiple choice. (8 pts.)

Please read these carefully. Only one response correctly answers the question, or completes the statement. Circle the corresponding letter (a, b, c, d, or e).

1. In South Florida's sandy soils, the most serious nematode pest of turf is:

a. lance

b. ring

c. sting

d. root knot

e. stubby root

2. Which group of turf insect pests has the longest (1 to 4 year) life cycle?

a. mole crickets

b. grubs

c. lawn caterpillars (including sod webworms)

d. chinch bugs

e. mites

3. A biological toxin, used to kill lepidoteran larvae (i.e., caterpillars) is derived from:

a. Bacillus popillae

b. Steinernema carpocapsae

c. Bacillus thuringensis

d. all of the above

e. none of the above

4. Most turfgrass diseases are cause by:

a. fungi

b. nematodes

c. viruses

d. bacteria

e. none of the above

Short answer. (22 pts.)

5. List the three corners of the "disease triangle," that is, the three conditions necessary for disease to occur (3 pts)

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6. What are four indicators of sod webworm activity? (4 pts.)

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7. Explain why the sting nematode is a most serious problem in sandy soil, but not in heavier, loam soils. (3 pts.)

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8. Give two examples of non-herbicidal management of weeds:

(4 pts.)

(1) ______________________________________________________________

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(2) ______________________________________________________________

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9. What environmental condition is most often favorable to turf diseases? (2 pts.)

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10. How would you determine whether chinch bugs were damaging the turf? (3 pts.)

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11. Why is timing important to prevent weed problems during turf establishment?

(3 pts.)

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