Arboriculture Glossary of Terms

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Category: All Categories Fungi Reference Terms in Hong Kong Tree Risk Assessment Tree Species

  • i

  • end of a rope not in use (contrast with I standing part and working end).
  • suite of software products and management tools including STRATUM. UFORE and MCTI; allows the user to inventory the urban forest and analyze its costs. benefits. and management needs.
  • indoleacetic acid
  • indolebutyric acid
  • isobutylidene diurea
  • Institute of Chartered Foresters
  • guide used to help identify plants and other organisms.
  • in Integrated Vegetation Management (IVM). a vegetation condition that could cause damage or interruption of service to overhead energized facilities or pipelines at any moment.
  • Incapable of being moved in plant tissue or soil
  • surface that does not allow for infiltration and/or penetration of liquids.
  • 1) device. capsule. or pellet inserted into the tree's xylem system to treat or prevent diseases. disorders. or pest problems. Requires a relatively large diameter and deep hole in the trunk (contrast with macroinfusion. macroinjection. and microinjection). 2) a micro-chip device implanted into a tree and containing information about the tree that can be retrieved and updated by a compatible chip reader.
  • soil brought into a site from another location.
  • Form of repair grafting used when roots have been damaged or injured
  • vegetation that is undesirable. unsafe. or interferes with the intended use of the site.
  • device used to take core samples from trees to determine age or detect problems. such as decay (see micro drill resistance testing). indeterminate growth continued growth due to sustained activity of the apical and lateral meristems (contrast with determinate growth).
  • plant species that exhibit early. reversible symptoms of drought stress and are specifically used in hydrozones to signal a need for watering.
  • species that originate and occur naturally at a site.
  • exposure to electrical current by touching any electrical conductor that is in contact with an energized conductor.
  • (Form 2) to conduct a detailed assessment of an individual tree that needs special attention. This is an in-depth inspection that examines the full range of tree defects and site conditions present to determine the risk level of a tree to fail and strike a target. A tree hazard rating with follow-up mitigation actions to address the identified defects and tree problems are given in the assessment. In some cases, use of advance equipment is required to identify, analyse and evaluate the(...)
  • capable of being spread to plants from other plants or organisms.
  • the presence of a pest population on a host plant or group of plants.
  • I) downward entry of water into the soil (contrast with percolation). 2) entry of fine particles into drainage or aeration systems; can lead to system clogging and failure. 3) downward entry of materials from one soil or fill layer to another. as when a gravel road surface mixes with underlying soil.
  • speed at which water penetrates the soil.
  • cluster of flowers. in-ground fabric-bag grown trees and shrubs field grown in fabric bags. commonly called grow bags (contrast with balled and burlapped. bare root. container grown. and containerized).
  • facilities and systems. such as sewers. roads. utilities. serving a community.
  • Areas of low traffic flow and low pedestrian flow such as road verges of limited access, countryside roads, village footpaths, etc. Tree Risk Management Zone - Medium (Category II) Priority for Tree Risk Management - Second priority Tree Risk Assessment Frequency - Every 3 to 5 years, if resources permit, and when necessary (e.g. act on complaint)
  • injection of a liquid substance into a plant or soil.
  • in soil science. microorganisms (e.g.. mycorrhizal fungi) that are introduced into the soil in order to improve growth or plant health.
  • part of a pathogen that can enter the host and can cause disease.
  • compound or substance not containing carbon. Not containing organic material (contrast with organic).
  • mineral fertilizer. not coming from plant or animal sources (contrast with organic fertilizer).
  • substances. man-made or naturally occurring in insects. that affect growth and development of insects.
  • soap-based pesticides approved for application to plants to kill insects and certain mites by disrupting the cell membranes or the insect's respiratory tracheas.
  • substances toxic to insects.
  • stage of growth between molts in the development of insect larvae.
  • method of managing pests that combines cultural. biological. and chemical control tactics into a single management strategy.
  • Areas of high traffic flow and high pedestrian flow including public parks, playgrounds, crowded streets, busy carriageways, car parks, busy footpaths, areas adjacent to schools, buildings, etc. Tree Risk Management Zone - High (Category I) Priority for Tree Risk Management - Top priority Tree Risk Assessment Frequency - At least once a year before onset of wet season (i.e. 30 April) and when necessary (e.g. act on complaint)
  • between the nodes on a stem.
  • region of the stem between two successive nodes (contrast with node).
  • pace b tween the veins on a plant leaf
  • yellowing of interveinal tissue.
  • leaf tissue between the veins or vascular bundles. J
  • organisms not native to a region (contrast with exotic species. native species. and naturalized species).
  • in Plant Health Care. the intentional l release or planting of a non-native species within a landscape.
  • non-native organisms that have spread beyond their natural range. disrupting the balance of an ecosystem. ]
  • Institute of Horticulture
  • atom or a group of atoms with a positive or negative charge. ~ l
  • Integrated Pest Management
  • International Society of Arboriculture
  • International Standards Organization
  • International Tree Climbing Championship
  • Integrated Vegetation Management
  • Ixora