Chap 4 Key Terms 2 Flashcards
corrosive
A substance that damages animals (including humans) at the point of contact
cover-type conversion
A type of biological control in which a plant community is converted from incompatible to compatible species using selective techniques that provide a competitive advantage to short growing, early successional plants, allowing them to thrive and successfully compete against unwanted tree species for sunlight, essential nutrients and water.
cover-type mapping
Technique that uses aerial photographs followed by ground checks to determine the nature of plant communities on a site
cultural control method
Control method that modifies habitat to discourage incompatible vegetation and establish and manage compatible plant communities
dose
The quantity of a substance absorbed into the body
hack and squirt
Method of herbicide treatment involvong herbicide application into cuts in the trunk (also called frill treatment)
half-life
Amount of time it takes half of the quantity of a substance to dissipate, indicating urbicide persistence in this text
LD50
Oral or dermal lethal dose of a substance that kills half the test animals within the two week test period
LiDAR
Acronym for Light Detection And Ranging technology that uses laser pulses to evaluate field conditions and workloads on rights-of-way with results depicted in a computer image
mechanical control methods/mechanical pruning
Vegetation removal using heavy equipment fitted with power saws or other cutting devices, such as saws mounted on booms or suspended from a helicopter
minimum vegetation clearance distance (MVCD)
Calculated minimum distance between conductors and vegetation to prevent spark-over, for various altitudes and operating voltages, that is used in the design of transmission facilities
mode of action
Botanical biochemical pathways disrupted by herbicides; common types include ALS or AHAS inhibitors, synthetic auxins, EPSP inhibitors, photosystem I inhibitors, photosystem II inhibitors, proton inhibitors, and auxin transport inhibitors.
non-selective herbicides
Herbicides that affect a broad range of plant species
peripheral zone
In vegetation management, the area outside the right-of-way, where tall growing species may be allowed, although they need to be monitored for risk
supply container
Container in which custom plans of diluted concentrates, or ready-to-apply herbicides are provided to applicators. Registered herbicide concentrate is typically provided in returnable, reusable supply containers, while registered and ready-to-use products are typically provided in one-way, disposable supply containers.
tolerance level
Maximum incompatible plant pressures (species, density, height, location, or condition) allowable before unacceptable consequences develop
toxicity
Ability of a substance to damage an organ system, to disrupt a biochemical process, or disturb in enzyme system
tree growth regulator (TGR)
Chemical that slows terminal growth by reducing cell elongation
tree risk assessment
A systematic process used to identify analyze and evaluate tree risk
wire zone
Transmission right-of-way vegetation management philosophy applied through cover-type conversion. The wire zone is the section of a utility transmission right-of-way under the wires and extending out both sides to a specified distance. The border zone is the remainder of the right-of-way, where small trees and tall shrubs (under 25 feet in height at maturity) are established. (see wire-border zone)
wire-border zone
Transmission right-of-way vegetation management philosophy applied through cover-type conversion. The wire zone is the section of a utility transmission right-of-way under the wires and extending out both sides to a specified distance. The border zone is the remainder of the right-of-way, where small trees and tall shrubs (under 25 feet in height at maturity) are established. (see wire zone)
workload assessment
Survey of the volume of work. Maybe done by comprehensive inventories or sampling
