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| rope construction in which three strands are twisted together in a spiral pattern |
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| 7-strand, common grade cable |
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Definition
| steel-cable construction in which seven strands are twisted together in a spiral pattern. used to add supplemental structural support to trees. terminated by wrapping into itself. |
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| for arborist ropes, a braided rope consisting of 12 strands. most are coreless. there are 2 types of 12-strand construction: a tight braid that is not easily spliceable, used for climbing and rigging lines; and loose, easily spliceable braid, commonly used for slings. |
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| for arborist ropes, a braided rope that has a 16-strand, load-bearing cover and a filler core that is not significant in load carrying. |
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| for arborist ropes, a braided rope that has a 24-strand cover and is available in double-braid or kernmantle construction. |
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| plant malady caused by nonliving, environmental, or man-made agents. |
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| area at the base of the petiole where cellular breakdown leads to leaf and fruit drop. |
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fine, fibrous roots that take up water and minerals.
most are located within the top 12 inches (30 cm) of soil. |
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1) second climbing line hung in a tree in case it is needed to reach a victim in an emergency.
2) climbing line installed in a tree to gain access to, but not used to work in, a tree. |
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| defined entrance and exit route for a property during construction, tree work, or landscape operations. |
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| physiological adaptation process of plants and other living organisms to a climate or environment different from their native environment or where grown originally. |
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group of soil bacteria resembling fungi.
they play a role in the decomposition of organic matter and the release of mineral elements. |
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| pest population or plant damage level that requires action to prevent irreversible or unacceptable physiological and/or aesthetic harm. |
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| disorder or disease that occurs suddenly or over a short period of time.. aka. chronic. |
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Definition
| genetic ability of plants and other living organisms to adjust or acclimate to different environments. |
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| bud arising from a place other than a leaf axil or shoot tip, usually a result of hormonal triggers. |
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| method of bringing an injured worker down from a tree or aerial lift device. |
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| aboveground roots. usually adventitious in nature and sometimes having unique adaptive functions. |
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Definition
| with oxygen. process that occurs in the presence of oxygen. |
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Definition
1) close cluster or mix of small particles of soil and/or organic matter of varying sizes that are bonded together; sand, gravel, or small rocks in soil; and/or sand, gravel, or small rocks under paved surfaces.
2) clusters of fruits or flowers that appear as a single unit.
3) individual tree crowns that form a canopy. |
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Term
| air excavation device, air excavator |
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Definition
| device that directs a jet of highly compressed air to excavate soil. used within the root zone of trees to avoid or minimize damage to the roots, or near underground structures such as pipes and wires to avoid or minimize damage to them. |
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Definition
| uppermost point of a tree lightning protection system. |
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Definition
| steel wire rope of various constructions designated by the number of strands in the rope and the number of wire in each strand; commonly used in cabling in Australia and New Zealand. |
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| substance produced naturally by plants as a part of a defense against pests and other plants. May adversely affect the growth and development of other plants. |
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| chemical effect or inhibition of growth or development of plants that is induced by allelochemicals. |
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Definition
pertaining to bud or leaf arrangement, one leaf or bud at each node, situated at alternating positions along the stem. in this arrangement, the leaves are not directly across from each other.
contrast with opposite or whorled. |
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Definition
| specialized nut used in cabling trees that has a large eye for attaching a cable to a threaded rod. |
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Definition
| without oxygen. process that occurs in the absence of oxygen. |
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Definition
| hardware in which the cable teremination is affixed Ina cabling or guying installation. |
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Definition
plant with seeds borne in an ovary. consists of 2 large groups: Monocotyledons (grasses, palms, and related plants) and Dicotyledons (most woody trees, shrubs, herbaceous plants and related plants).
contrasts with gymnosperms. |
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Definition
ion that carries a negative charge.
contrast with cation. |
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Definition
| in the US, industry-developed, national consensus standards of practice for tree care. |
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Definition
| in the US, industry-developed, national consensus safety standards of practice for tree care. |
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Definition
red or purple pigment responsible for those colors in some parts of trees and other plants.
compare to Carotenoids. |
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| plant growth regulator that inhibits the action of the plant hormone gibberellin, which, among other things, regulates cell elongation. |
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| substance applied to the foliage of plants to reduce water loss (transpiration). |
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Definition
bud at the tip of a twig or shoot.
see Terminal Bud. |
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Definition
| inhibition of lateral buds, decreasing from the top down, by apical buds over many seasons, resulting in trees with an excurrent growth form. |
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Definition
| condition in which the terminal bud inhibits the growth and development of the lateral buds on the same stem formed during the same season. |
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Definition
| growing point at the tips of shoots and roots. |
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Definition
free spaces in plant tissue. includes cell walls and intercellular spaces.
contrast with Symplasm. |
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Term
| appropriate response process (ARP) |
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Definition
| method of systematically assessing plant health and client needs to determine which course of action, if any, is recommended. |
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Definition
| in the context of guidelines, standards, and specifications, that which is acceptable to federal, state, provincial, or local enforcement authorities or is in an accepted industry practice. |
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Definition
| practice and study of the care of trees and other woody plants in the landscape. |
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| heavy-duty pulley with an integrated connection point (bushing for attaching a rope sling), a rotating sheave for the rope, and extended check plates. used in tree rigging operations. |
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Definition
| piece of gear that enables a climber to ascend a rope. attached to the rope, it will grip in one direction (down) and slide in the other (up). |
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Definition
| in Plant Health Care, the release of beneficial organisms to suppress pest insect or mite population. |
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Term
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Definition
| plant hormone or substance that promotes or regulates the growth and development of plants. produced at sites where cells are dividing, primarily in the shoot tips. Auxin-like compounds may be synthetically produced. |
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Term
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Definition
water remaining in the soil after gravitational water has drained and before the permanent wilting point has been reached.
compare to Gravitational Water, Field Capacity, and Permanent Wilting Point. |
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Definition
| movement of water, minerals, or photosynthates longitudinally within a tree. |
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| bud in the axil of a leaf. lateral bud. |
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| cut made on a tree trunk or branch, opposite from and toward the notch, face cut, or undercut, to complete felling or branch removal. |
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| pesticide that is used to kill or inhibit bacteria in plants or soil. |
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| in rigging, a technique for lowering a limb without allowing either end to drop. |
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Term
| balled and burlapped (B&B) |
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| best management practices (BMPs) |
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| biorational control product |
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