AGRO 3503, Wheat pest management and harvesting.  Unit IV-3, 20 pts.


Use the following links to find clues to help you answer the following questions.


            Wheat insect management


            Wheat disease management


            Wheat weed management


            Harvesting wheat


1.  In general, the two types of insects that cause economic losses in wheat are:

            A. grasshoppers and thrips                                 B. loopers and aphids

            C. aphids and armyworms                              D. grasshoppers and armyworms


2. In a 1990 study in Arkansas, methyl parathion insecticide at 0.25 lbs a.i./acre reduced

    true armyworm numbers in relation to the untreated checks by about:

            A. 10 per square ft                                         B. 5 per square ft

            C. 7 per square ft                                         D. only 1 or 2 per square ft


3. Yellowing of leaves by greenbug aphid feeding on wheat is due to:

            A. N deficiency                                             B. aphid ingestion of chlorophyll

            C. a toxin injected by the aphids                D. an aphid bacteria


4. The hardest aphid in wheat to control with insecticides is the:      

            A. oat bird cherry                                            B. greenbug

            C. corn leaf                                                       D. English grain


5. The barley yellow dwarf  virus is transmitted by:

            A. the Hessian fly                                            B. fall armyworms

            C. reniform nematodes                                D. aphids


6. Seedborne diseases of wheat are commonly controlled by:   

            A. resistant varieties                                                B. using fungicide seed treatments

            C. planting early                                        D. using foliar fungicides


7. Leaf rust can be controlled by:

            A. fungicide seed treatments                                 B. fall and spring N applications

            C. early planting                                     D. single spring foliar fungicide


8. Take-all disease of wheat is easily controlled by:

            A. single spring fungicide application            B. early planting

            C. rotating out of wheat for a year                  D. seed fungicide treatments



9. Take-all disease of  wheat is caused by:

            A. a soil borne virus                                     B. a air borne virus

            C. an aphid vectored bacteria                                    D. a soil-borne fungus


10. Which of these fungicides worked best for control of tan-spot disease in the

       2003 Arkansas study?

            A. Quilt @ 10 oz/ac                                          B. Tilt @ 4 oz/ac

            C. Stratego @ 8 oz/ac                                        D. Palisade @ 12.8 oz/ac


11. The first step in wheat weed control management is:

            A. hire a consultant                                          B. select a high yielding variety

            C. identify the weed problems             D. take a soil sample


12. The best time to apply 2,4-D herbicide to wheat is:

            A. after planting, but before emergence            B. at Feekes 2

            C. at Feekes 4 or 5                                       D. at Feekes 9


13. If soybeans are planned to follow wheat, which of these herbicides should NOT be

      used for wild garlic control?

            A. 2,4-D amine                                                B. 2,4-D ester

            C. Harmony Extra                                     D. Peak


14. Best control of annual ryegrass by Hoelon herbicide is:     

            A. at 1-3 leaf                                                    B. preemergence

            C. 7-8 leaf                                                       D. at ryegrass heading


15. The best control of Hoelon resistant ryegrass is obtained with:

            A. 2,4-D                                                         B. Finesse preemergence

            C. with Harmony Extra                         D. methyl parathion


16. The best herbicide choice for control of curly dock in wheat is:

            A. 2,4-D                                                         B. Express

            C. Hoelon                                                 D. Harmony Extra


17. When wheat dries below 15%, storm damage may cause field losses:

            A. of about 20 bu/ac                                     B. of only 1-2 bu/ac

            C. as high as 10 bu/ac                                        D. as high as 50 bu/ac


18. Wheat combine efficiency is maximized by:

            A. maintaining uniform feeding             B. using rotary straw walkers

            C. cutting wheat at 15% + moisture                       D. maximizing straw gathering


19. Allowable field losses due to the combine harvest shouldn’t exceed:

            A. 0.1 bu/ac                                                    B. 1 bu/ac

            C. 10 bu/ac                                                    D. 20 bu/ac   


20. If no-till planting soybeans after the wheat harvest, one should: 

            A. cut the wheat as close to the ground as possible

            B. get approval from the USDA wheat board

            C. use spike tooth thresher units

            D. utilize chaft spreaders