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.
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