- - AGRICULTURE CORE CURRICULUM - -

(CLF6000) Advanced Core Cluster: ORNAMENTAL HORTICULTURE

 (CLF6300) Unit Title: DISEASES AND PESTS OF ORNAMENTAL PLANTS

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 (CLF6349) Topic: UNIT TEST               Time              Year(s) 
                                             1 hour             3 / 4 
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NAME _________________________


 1. T F All plant diseases are easily controlled.

 2. T F Plants that receive balanced nutrients can best withstand 
          diseases and pests.

 3. T F Plant pathogens can affect plants by reducing leaf area, by
          reducing water absorption, or by suppressing chlorophyll.

 4. T F Anything that comes in contact with bacteria can spread them.

 5. T F Examples of plant diseases that are caused by viruses are crown 
          gall, fireblight, and soft rot.

 6. T F Fungi photosynthesize their own food through spores.

 7. T F Viruses move from plant to plant by carriers.

 8. T F Fungi can be controlled by chemicals, crop rotation, or soil
          pasturization.

 9. T F Weeds reduce crop yields, harbor insects, increase crop
          production costs, reduce the quality of crops, and spoil the 
          beauty of landscapes.

10. T F  Pesticides are rated by a term called LD50.

11. T F  Danger, poison, warning, and caution are categories of
           pesticides.

12. Match the description with the organism or substance.

     _____ Bacteria           A. microscopic, non-cellular organisms

     _____ Fungi              B. chemical used to kill plants

     _____ Viruses            C. small plants lacking chlorophyll

     _____ Herbicide          D. single-cell, microscopic organisms

     _____ Insecticide        E. chemical used to kill insects

13. List four different methods to control weeds.






14. List and explain three different methods of chemical application of 
   herbicides or insecticides.






15. Define the following terms:

   weed -



   pre-emergent -



   selective chemical -



   non-selective chemical -




16. Toxicity is the capacity of a chemical to ____________________________.

17. List four methods by which diseases of plants can be spread.






18. List three reasons why growers of ornamental plants should have a 
   disease prevention program.






19. What is the basic principle of Integrated Pest Management (IPM)?






20. List three different examples of IPM control.







1/4/91 MT/clh

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