Right of way Utah pesticide terms Questions and Answers

Field Bindweed - Answer- perennial Common Mullein - Answer- biennial Purpose of surfactants added to a pesticide formulation is to - Answer- increase longevity What is the application of an herbicide to the stems of plants at or just above ground level called? - Answer- Basal application foliar application - Answer- spraying of liquid fertilizer directly onto the leaves of plants Biennial plants - Answer- Form basal leaves and a tap root. Grass plants exhibit which of the following characteristics? - Answer- Having parallel veined leaves. Established perennial plants are best controlled during which of the following growth stages? - Answer- Actively growing. Virtually no weed control is obtained when herbicides are applied during which stage of growth? - Answer- mature Barnyardgrass is a - Answer- summer annual Which of the following should be avoided in order to ensure maximum success of a translocated herbicide application? - Answer- Mechanical damage to the plant Application of an emulsion requires - Answer- occasional agitation of the spray mixture. Which of the following is used when treating close-cut stumps and exposed roots? - Answer- Herbicides in water or herbicides in oil The best time to effectively control biennial plants is - Answer- At any time after maturity. ? What is the herbicide formulation most commonly used in treating soil for woody plant control? - Answer- Pellet or granular Herbicides are more persistent in which type of soil? - Answer- Clay Herbicide penetration is more likely to occur under which of the following conditions? - Answer- Cool temperature, high humidity? The presence of organic matter in the soil - Answer- Will hold herbicides in the soil. The restrictions relating to endangered species may change? - Answer- every year. A definition of phytotoxicity is: - Answer- An undesirable injury to plants. High humidity following foliar herbicide application - Answer- increases the speed at which the herbicide penetrates the plants. The objective of industrial and right-of-way vegetation management is to - Answer- Maintain a definable type of cover.? What is a hormone type herbicide? - Answer- One that regulates or disrupts plant physiological processes resulting in control For control of some perennials, foliar active herbicide applied in the fall is effective because: - Answer- The herbicide is translocated downward with nutrients into plant roots. Residual herbicides: - Answer- Are active in the soil for an extended time. The herbicide 2,4-D is most commonly used for - Answer- Broadleaf weed control Herbicides work best when - Answer- Plants are growing quickly. Herbicides can be classified by - Answer- How long it takes to kill plants. In contrast to broadleaf weeds, grasses have what kind of growing points? - Answer- Protected Plants that are perennials: - Answer- Can live indefinitely. ? What are plants called which complete their life cycle within two years? - Answer- Biennials Which of the following is an annual? - Answer- Russian thistle ased on methods used for controlling them, weeds are divided into what three main categories?b - Answer- Grasses, forbs, and shrubs Broadleaf plants generally have tap or coarse root systems and what type of leaves? - Answer- Broad, vertical-veined Which category of plant has a jointed, hollow, or pithy stem? - Answer- Grass Which of the following plants germinate in the fall, overwinter, mature, set seed, and die in early spring or early summer? - Answer- Winter annuals Ingredients which are added to an herbicide formulation to make it work better are known as - Answer- Adjuvants. Which of the following is NOT considered to be a type of cut-surface treatment for woody plants? - Answer- Desiccation Which of the following may be used where a vegetative cover must be maintained and mowing is not practical? - Answer- Growth retardants Soils with low organic matter - Answer- Need lower pesticide rates than high organic matter soils. Sometimes it is more desirable to leave weeds on a roadside berm because? - Answer- It can prevent excessive erosion of the roadside. Soil persistence refers to: - Answer- The length of time that an herbicide applied to the soil remains effective. ? Some plant species have structures that enable them to spread without the aid of seed or seed germination. These structures are: - Answer- tubers and rhizomes, Bulbs and stolons, Root pieces and bulblets.