Question Set 11 for the CEU Series

Below is Question Set 11 for the CEU article “Get A Grasp On Greening” from the article’s author: Aparna Gazula, 2800 NE 39th Ave., Gainesville, FL 32609, Phone: 352-955-2402, Fax: 352-334-0122, Email:agazula@ufl.edu

Submit your answers to Question Set 11, along with your license number, to be graded. If you answer enough questions correctly, you’ll receive a validated attendance form good for one Private Applicator Ag, Ornamental & Turf, Commercial Landscape & Ornamental, and Limited Landscape & Ornamental.

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1. Name the three types of citrus greening bacterium, and then name the bacterium that is currently found in Florida.

2. List the three types of citrus that are highly susceptible to the citrus greening disease.

3. How many generations of the citrus psyllids are generally seen in a year?
A. 5-6
B. 9-10
C. 12-13
D. 7-8

4. The psyllid eggs can be found on the following parts of the citrus plant (select one answer).
A. On the underside of mature leaves
B. The tips of growing shoots on and between unfurling leaves
C. On the stems of recent growth
D. On the bark of older mature branches

5. When scouting for the psyllid nymphs what distinguishing characteristics (body characteristics) should you look for (describe all characteristics that apply)

6. The adult is psyllid is:
A. About 4-5 mm long, dark brown head, no band on outer half of wing
B. About 3-4 cm long, light brown head, brown band on outer half of wing
C. About 3-4 mm long, light brown head, with a brown band on outer half of wing
D. None of the above

7. Low populations of adult citrus psyllids can generally be found during the following season.
A. Summer
B. Spring
C. Winter

8. Highest activity of the citrus psyllid corresponds with the periods of new growth of citrus trees:
A. True
B. False

9. The citrus psyllids cause damage to the fruit trees due to the following activity:
A. Defoliation of leaves, and transmitting the disease bacterium
B. Chewing flowers, and transmitting the disease bacterium
C. Sucking large quantities of sap from leaves, and transmitting the disease bacterium
D. None of the above

10. Disease affected fruit exhibit the following symptoms:
A. They are small and often misshapen
B. Tastes bitter, medicinal, and sour
C. Some green color on the fruit and have aborted seed
D. All of the above

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