Ch. 2. Vegetation Management Flashcards
A method of applying herbicides in which they are spread over a wide area and not aimed at specific plants or locations
Broadcast application
Application of herbicides mixed with penetrating oil to the lower 12 to 15 inches of the main stems.
Basal bark application
A term used to describe the brown appearance of dead foliage following the application of a herbicide
Brownout
CAIDI
Customer average interruption duration index
CML
Customer minutes lost
Vegetation that has recently been mowed and before regrowth
Cut stubble
A method of placing herbicide on stumps immediately after cutting so that the herbicide is absorbed and translocated to the roots
Cut-surface application
The length of time between each maintenance pruning for a given circuit or area
Cycle
Fast growing trees that need to be pruned more frequently than the set cycle
Cycle busters
Plants that do not grow to heights that would cause them to impact the conductors and that may suppress the establishment of undesirable plants under conductors
Desirable vegetation
Applying herbicide to specific plants or parts of plants
Directed application
Electricity lines that carry the power that is to be delivered to customers
Distribution lines
Conductors through which electricity is flowing
Energized conductors
Machines designed to cut vegetation by means of a moving blade, chain, or other cutting device
Flail-type cutters
The leaves of a plant
Foliage
Application of a fertilizer or other substance by direct spray on the foliage
Foliar application
A plant growth substance that controls cell elongation
Gibberellin
A tree whose condition is such that it could fail and cause damage to conductors or other hardware
Hazard tree
Chemical compounds that kill vegetation
Herbicides
Lines with voltages greater than a specified amount, depending on the utility; typically in excess of 480 Volts
High voltage lines
A process by which limited tree work is scheduled on a specific area of the network wear shorts or outages are occurring
Hotspotting
The machinery used to transmit and distribute electricity, including poles, towers, conductors, transformers, substation, etc.
Infrastructure
A process in which vegetation is pruned or removed using a variety of combination of methods including pruning, herbicides, mowing, and biological control
Integrated vegetation management (IVM)
A list of trees and vegetation present on the system
Inventory
The description of the active ingredients, dilution, and rates of application of herbicides and the uses to which they can be put
Label
The measure of electrical potential, which is not greater than 1000 V between phases
Low voltage lines
Loss of electricity supply for small amounts of time that result from the fuses opening and closing again as a result of the voltage changes not large enough to completely shut down the power
Momentary interruptions
The management of trees and vegetation on the overhead lines following a survey or assessment of the problems and scheduling maintenance before vegetation causes any interruptions
Preventative or proactive maintenance
Management of trees and vegetation in response to interruptions caused by vegetation
Reactive or corrective maintenance
A method to minimize Tree-caused outages by conducting a detailed analysis of the system, vegetation conditions, outage history, infrastructure, and other factors, and identifying a range of preventative maintenance tasks that have the potential to provide greater reliability and cost efficiency then pruning and removal alone
Reliability-centered management (RCM)
Area of land under and just adjacent to overhead conductors over which the utility has a negotiated right to enter and maintain vegetation when required
Right-of-way (ROW)
A single or multi blade arrangement that rotates horizontally and cuts or shreds the education
Rotary cutting head
A measure of the number of interruptions that occur on a utility’s system
System average interruption frequency index (SAIFI)
Directing herbicides specifically at target (undesirable plants) leaving desirable plants untreated so that they remain
Selective application
Herbicides that are predominantly effective on certain plant species, typically the undesirable ones, leaving low growing desirable plants unaffected
Selective herbicides
A method of applying herbicides or tree growth regulators to trees through the soil by excavating a shallow trench in the soil around the base of the trunk and pouring the compound into the trench
Soil drench application
A method of applying herbicides or tree growth regulators to trees through the soil via injection directly into the root zone
Soil injection application
Decay, points of weakness such as poor branch attachment, and/or large regrowth from an old topping point, and large deadwood throughout the crown of the tree
Structural defects
A method to determine vegetation conditions throughout the system
Survey
Any object that may be damaged or hit by a tree
Target
Conductors used to transmit electricity from the generation station (SUB) to the distribution network that usually carry voltages in excess of 100,000 volts
Transmission lines
A chemical that can be applied to trees that slows extension growth by shortening cell elongation
Tree growth regulator (TGR)
The control of wanted and unwanted vegetation on utility right-of-way for various objectives
Vegetation management
A comprehensive utility vegetation management program should be _______rather than reactive and based on principles of ________vegetation management.
Proactive, integrated
An important first step in any vegetation management program should be to assess system conditions, which is often done through and________.
Inventory
A traditional cycle will schedule maintenance _______trees grow into the conductors.
Before
A vegetation management scheduling unit may be an entire _____or geographic_____.
Circuit, area
Fast-growing, problem species are sometimes known as______.
Cycle busters
Reactive maintenance is often called
Hotspotting
Utility _____and _____would be considered targets if a structurally weak tree were on or close to the utility right of way
Lines, equipment
Ideally, TGRs should be applied when a tree is actively growing and ____to____months before pruning takes place.
2,3
Besides pruning, _____and______ treatments are often part of an integrated vegetation management program
Mechanical, herbicide
Vegetation can be chemically controlled in a selective manner with either a _____selective or a ______selective
Herbicide, application
Mowing often causes:
Increased woody stem count
Leaning trees should be viewed as:
Potential hazards requiring further investigation
Which utility right of way herbicide application practice is most appropriate for brush control in areas with sensitive public relations issues?
Basal treatment
Mobilizing crews for herbicide work is easiest when they utilize:
Backpack sprayers
Preventing vegetation caused outages receives highest priority on:
Transmission circuits
