Iowa Herbicide Right of Way - Category 6 exam questions with answers

Iowa Herbicide Right of Way - |\ |\ |\ |\ |\ |\




Category 6 exam questions with |\ |\ |\ |\ |\




answers

Growth regulator application is most effective when applied:
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A. in early spring when sod has greened
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B. in late spring when sod has grown at least 2"
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C. after 3 times mowing
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D. in fall just prior to leaf fall - CORRECT ANSWERS ✔✔in early
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spring when sod has greened
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Which procedures will help reduce herbicide drift?
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A. Increasing spray pressure
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B. Reducing spray pressure
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C. Hanging nozzles to a type which emits larger droplets
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D. Reducing height of boom
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E. Both B and C - CORRECT ANSWERS ✔✔Both B and C
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Phenoxy herbicides are widely used along roadsides because:
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,A. They are effective on a wide variety of broadleaf and woody
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species
B. They rarely damage plants in adjacent areas
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C. They are high in human toxicity
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D. They do not damage grasses
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E. Both A and D - CORRECT ANSWERS ✔✔They do not damage
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grasses


Which of the following nonselective herbicides has the longest
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period of control, when used at a given site:
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A. Bromacil
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B. Dichlobenil
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C. Prometon
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D. Tebuthiuron - CORRECT ANSWERS ✔✔Dichlobenil
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When is the best time to treat many perennials developing from an
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established root system? - CORRECT ANSWERS ✔✔During early
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flowering


In order to avoid injury to nearby desirable trees; persistent,
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nonselective herbicides such as Hyvar should be applied:
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A. Only in the fall
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, B. Outside the drip line of the desirable trees
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C. At least 10 feet from the desirable trees
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D. Outside an area equal to twice the height of the desirable trees
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E. A minimum of 1/2 mile from the desirable trees - CORRECT
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ANSWERS ✔✔Outside an area equal to twice the height of the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



desirable trees |\




Basal bark treatment is not recommended for wood species larger
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than 6" in diameter because:
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A. The bark prevents penetration of the herbicide and reduces
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effectiveness
B. The cost is prohibitive
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C. There is a high risk of drift
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D. None of the above - CORRECT ANSWERS ✔✔The bark prevents
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penetration of the herbicide and reduces effectiveness
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A major disadvantage of the phenoxy-herbicides is:
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A. They are non-selective herbicides
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B. They can damage desirable plants at very low rates, making them
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susceptible to drift damage
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C. They are highly toxic to wildlife
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