Iowa Herbicide Right of Way - Category 6 Questions with Verified Solutions In early spring when sod has greened - Correct Answer Growth regulator application is most effective when applied: A. in early spring when sod has greened B. in late spring when

Iowa Herbicide Right of Way - Category 6 Questions with Verified Solutions In early spring when sod has greened - Correct Answer Growth regulator application is most effective when applied: A. in early spring when sod has greened B. in late spring when sod has grown at least 2" C. after 3 times mowing D. in fall just prior to leaf fall Both B and C - Correct Answer Which procedures will help reduce herbicide drift? A. Increasing spray pressure B. Reducing spray pressure C. Hanging nozzles to a type which emits larger droplets D. Reducing height of boom E. Both B and C They do not damage grasses - Correct Answer Phenoxy herbicides are widely used along roadsides because: A. They are effective on a wide variety of broadleaf and woody species B. They rarely damage plants in adjacent areas C. They are high in human toxicity D. They do not damage grasses E. Both A and D Dichlobenil - Correct Answer Which of the following nonselective herbicides has the longest period of control, when used at a given site: A. Bromacil B. Dichlobenil C. Prometon D. Tebuthiuron During early flowering - Correct Answer When is the best time to treat many perennials developing from an established root system? Outside an area equal to twice the height of the desirable trees - Correct Answer In order to avoid injury to nearby desirable trees; persistent, nonselective herbicides such as Hyvar should be applied: A. Only in the fall B. Outside the drip line of the desirable trees C. At least 10 feet from the desirable trees D. Outside an area equal to twice the height of the desirable trees E. A minimum of 1/2 mile from the desirable trees In early spring when sod has greened - Correct Answer Growth regulator application is most effective when applied: A. in early spring when sod has greened B. in late spring when sod has grown at least 2" C. after 3 times mowing D. in fall just prior to leaf fall Both B and C - Correct Answer Which procedures will help reduce herbicide drift? A. Increasing spray pressure B. Reducing spray pressure C. Hanging nozzles to a type which emits larger droplets D. Reducing height of boom E. Both B and C They do not damage grasses - Correct Answer Phenoxy herbicides are widely used along roadsides because: A. They are effective on a wide variety of broadleaf and woody species B. They rarely damage plants in adjacent areas C. They are high in human toxicity D. They do not damage grasses E. Both A and D Dichlobenil - Correct Answer Which of the following nonselective herbicides has the longest period of control, when used at a given site: A. Bromacil B. Dichlobenil C. Prometon D. Tebuthiuron During early flowering - Correct Answer When is the best time to treat many perennials developing from an established root system? Outside an area equal to twice the height of the desirable trees - Correct Answer In order to avoid injury to nearby desirable trees; persistent, nonselective herbicides such as Hyvar should be applied: A. Only in the fall B. Outside the drip line of the desirable trees C. At least 10 feet from the desirable trees D. Outside an area equal to twice the height of the desirable trees E. A minimum of 1/2 mile from the desirable trees