Termites - White Ants - New South Wales |
The destructive nature of termites in New South Wales |
Subterranean termites or "white-ants" are a highly destructive timber pest, causing major structural timber damage to domestic / commercial buildings in New South Wales.
Recent industry surveys suggest that about one third of all unprotected properties are subject to attack by termites. Most homes are at risk ... especially if well established gum trees are nearby the building - within a 100 metre radius. Severe termite damage to Australian homes is on the increase since the removal in 1995 of the long lasting soil barrier chemicals; the more common use of softwood building and other landscaping timbers that termites find irresistible. Other important factors include building designs, automatic watering systems, landscaping and maintenance that encourage termite activity and/or allow hidden termite entry and infestation into a building; and the inadequate licensing or regulatory system for the termite control service industry in New South Wales.
Termites are small in size (about half the size of match-head) and soft bodied insects. They build a central colony nest from which they construct underground tunnels that radiate in a 100 metre radius from a central colony nest in search of a timber (cellulose) food source.
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Termites have a symbiotic digestive system |
Only the worker termite caste can digest timber by the use of symbiotic protozoa in their gut. Worker termites feed their partly digested semi-liquid food, regurgitated from their mouth or passing from their anus, to the other termites, a process known as trophallaxis.
Certain hi-tech termite baits recently introduced on the Australian market from the USA have a delayed lethal effect on termites which readily pass on the bait to other termites in the central colony nest during the mutual grooming and feeding.
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The biology and behaviour of subterranean termites |
Within a termite nest there are members of different castes, each with a different role to perform and all interdependent upon each other for survival of the colony. These include the queen, king, the winged reproductive (young kings and queens), soldier and worker termites.
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The life-cycle of subterranean termites |
As noted above, termites constantly groom and feed each other. A valuable technique for the termite controller is to instal and monitor a termite baiting system next to any live activity found in and around the premises where termite foraging is most likely to occur. Subsequent inspections (preferably monthly) may reveal dead or sick worker termites, they change colour to a mottle look, and spread of the termite bait to other termites leading to elimination of the colony. The termite baits are designed to be non-repellant to the termites and has a unique delayed effect. Time enough to be passed onto the other termites in the colony including the queen, with a sufficient dosage leading to the elimination of the entire colony. This process is explained in detail in the Termite Control section of this website. |
The main destructive species of termites in NSW and ACT |
Coptotermes acinaciformis Commonly found throughout NSW and ACT - particularly in urban areas or where eucalypt gum trees are highly prevalent. Nest Location - Coptotermes acinaciformis are a very secretive termite species; they build their nest out of sight, often within the base of eucalyptus or other susceptible trees, or completely under the ground; often within an enclosed patio or under concrete on ground flooring which is ideal for moisture retention, temperature and humidity control within the termite colony's central nest. Coptotermes acinaciformis can also construct subsidiary nests away from the main colony nest. A subsidiary nest can be contained in a wall cavity of a building where there is a reliable moisture source, for example, from a leaking shower recess or faulty guttering or rusted down pipes. Destructive Nature - Coptotermes acinaciformis are highly destructive to buildings and other timber structures. They are the most widely distributed and destructive timber pest in Australia, accounting for more than 70% of the serious damage to buildings in New South Wales. A single colony may consist of more than one million termites. A most voracious timber pest ... one to be taken seriously. Schedorhinotermes intermedius Commonly found in eastern NSW - particularly along the entire coast-line, the Great Dividing Range and western slopes. Nest Location - Schedorhinotermes intermedius commonly build their nest in tree stumps, in the root crown of the living, dead and debilitated trees, under houses or within enclosed patios or other areas where timber has been buried or stored in contact with the soil. Identification - this species tends to "gouge" the affected timber and has a fetish around nails used in construction. When you first find them, you will often see a major soldier (6mm in body length) and a minor soldier (4mm in body length). Destructive Nature - Schedorhinotermes intermedius are highly destructive to buildings and other timber structures. If mostly major (larger) soldiers are sighted, then they will most likely be a large colony with the potential to cause severe and rapid damage to structural timbers of a building or other timber structures. Coptotermes frenchi Commonly found throughout NSW and ACT; particularly in urban areas, where buildings are constructed of softwood or oregon timber framing. This species is responsible for most of the timber pest damage to buildings in the ACT region, but are also prevalent throughout NSW.
Destructive Nature - Coptotermes frenchi can cause severe damage to buildings and other wooden structures. It is common for this species to devour timber framing leaving only a thin veneer. This species is the most shy of the destructive species; they will retreat from a location immediately (for the time being) if disturbed. Nasutitermes exitiosus Commonly found throughout NSW and ACT - particularly in urban areas or where eucalypt gum trees are highly prevalent. Nest Location - Nasutitermes exitiosus build a mound nest which protrudes 30cm to 75cm above the ground. Control can be as easy as knocking the top off the nest and a follow up insecticide treatment inside the nest. Destructive Nature - Nasutitermes exitiosus are destructive to buildings and other timber structures. Sometimes severe damage may occur, but not so commonly as the other species listed above. Coptotermes lacteus Commonly found in eastern NSW and ACT - particularly prevalent along the entire coast-line, along the Great Dividing Range and western slopes. Nest Location - this termite species, most often builds it's nest as a mound up to 2m above ground level, with hard clay walls, so control is easily effected once located by knocking the top off and insecticide treatment of the nest. Destructive Nature - Coptotermes lacteus attacks stumps, dead trees, timber fences, poles and other timber structures that are in contact with the soil, being softened by weathering or decay. These termites are also known to attack such timber in damp sub-floor areas. Nasutitermes walkeri Commonly found in eastern NSW - particularly prevalent in the coastal and mountain regions along the entire eastern side of NSW. Nest Location - Nasutitermes walkeri build their nest in trees on the main trunk or in the fork of a large branch. Destructive Nature - Nasutitermes walkeri can be destructive to damp timbers often a serious problem where the sub-floor of a building is damp and ventilation is poor with resulting wood decay or fungal growth. Heterotermes ferox Commonly found throughout NSW and ACT - particularly in urban areas or where eucalypt gum trees are highly prevalent. Nest Location - Heterotermes ferox often build their colony nest next to stumps, logs, or other timber in direct contact with the soil where some wood decay or rotting is prevalent. Destructive Nature - Heterotermes ferox are be destructive to damp timbers and are usually found attacking fences, poles and other timber structures subject to wood decay from weathering or from being in contact with the soil. This species is often confused with the more aggressive and destructive Coptotermes acinaciformis species. Correct identification is essential. Dampwood termites - form small independent nests which often attack sick or dead trees, decaying stumps or mouldy timber in the ground; they are seldom found in dry timbers in buildings. Drywood termites - occur mostly in tropical areas, where the atmospheric humidity is constantly above 75 percent. The introduced and highly destructive West Indian drywood termite, Cryptotermes brevis, is rarely located in NSW. Specialist eradication procedures involve wrapping the entire building in plastic and using methyl bromide fumigation. |
If You find termites do NOT disturb them |
Termites have acute survival instincts. If they are shaken up or disturbed,
the termites often will abandon the associated area and move on to secretly
cause damage in other areas in the building. If you find termites in or
around your property, it is essential that you do NOT disturb them and promptly
arrange for a professional inspection and application of a termite bait
to the live termites, if present in abundance.
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