|Termite.com.au <> Subterranean Termites <> Australia|
|CONSUMER GUIDE - Subterranean Termites - Termite Control systems|
| Subterranean termites also called "white-ants" are a highly
destructive timber pest, causing major structural timber damage to domestic
and commercial buildings in Australia.
Recent industry surveys suggest that about one third of all unprotected properties are subject to attack by subterranean termites. Severe subterranean termite damage to Australian homes is on the increase due to recent changes in the type of chemicals allowed to be used, building construction materials and designs that encourage hidden termite entry and infestation.
Subterranean termites are small in size (about half the size of match-head) and soft bodied insects. Subterranean termites 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.
Subterranean termites can pass through a 2 mm crack or an expansion joint (eating through the rubber compound) between adjoining concrete on ground flooring. Subterranean termites can also travel under parquetry and floor tiles to get to the wall framing timbers.
|Termites symbiotic digestive system to destroy your home|
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
subterranean termites, a process known as trophallaxis.
Certain hi-tech subterranean termite baits recently introduced on the Australian market from the USA have a delayed lethal effect on subterranean termites which readily pass on the bait to other termites in the central colony nest during the mutual groomoing and feeding.
|The Biology of Subterranean Termites or White Ants|
Subterranean termites or "white ants" as they are often
called are not ants at all. Subterranean termites are in fact related to
cockroaches with a similar two hundred million year history.
Within a subterranean termite nest there are members of different castes, each with a different role to perform. These include the queen, king, the winged reproductive (young kings and queens), soldiers and workers.
|The Life Cycle of Subterranean Termites|
The termite baits are designed to be non-repellant to the subterranean termites and has a unique delayed effect. Time enough to be passed onto the other subterranean termites in the colony including the queen, with a sufficient dosage leading to the elimination of the entire subterranean termites colony. This process is explained in detail in the Termite Control section of this website.
|The Main Destructive Species of Subterranean Termites in Australia|
It is essential for the subterranean termite pest controller to properly
identify the species of subterranean termite found in a property. Some species
of white ants prefer living and will not attack dry seasoned timbers in
a building, whilst others can be are highly destructive to such buildings
in a short amount of time.
Commonly found throughout Australia - particularly in urban areas or where eucalypt gum trees are highly prevalent.
Nest Location - Coptotermes acinaciformis are a very secretive white ant 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 white ant colony's central nest. Coptotermes acinaciformis can also construct subsidiary subterranean termite nests away from the main colony nest. A subsidiary subterranean termite 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 Australia. A single colony may consist of more than one million white ants. A most voracious timber pest ... one to be taken seriously.
Area of Distribution: Commonly found in tropical Queensland, Northern Territory and Western Australia - generally north of the tropic of Capricorn.
Nest location - Mastotermes darwiniensis build their nest (secretively) totally below the soil surface; or in the trunks and root crowns of trees and stumps. Once a nest is mature (over 100,000 or much higher) they can 'split off' to form other nests over a wide ranging area. These sub nests are formed constantly and can sustain life for along period of time without contact to the original nest.
Destructive nature - Mastotermes darwiniensis is one of the world's most destructive white ant species, often causing severe damage to houses, buildings, bridges, posts, poles, and many other plant and animal products. It is also an agricultural pest, responsible for ringbarking and killing living trees, shrubs, fruit, vegetable crops, sugarcane and rubber trees. It is reported to attack rubber tyres on tractors and cause damage to leather, hide, plastic or lead-sheathed cables, bitumen, bagged salt, flour, glass and various metals. Mastotermes darwiniensis is the most ancient of all the white ants in the world - they occur only in Australia - a white ant to be feared.
Area of Distribution: Commonly found in eastern NSW and south eastern Queensland - particularly along the entire coast-line, the Great Dividing Range and adjoining 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.
Area of Distribution: Commonly found throughout NSW, ACT, Victoria and south eastern South Australia; 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.
Nest Location - Coptotermes frenchi most often build their nest in the root crown or lower trunk area of living trees, particularly eucalypts. They may also build their nest as a mound in the dryer areas.
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.
Area of Distribution: Commonly found throughout NSW, ACT, Victoria and the southern areas of Queensland and Western Australia - 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.
Area of Distribution: Commonly found in eastern NSW, the ACT, and the south eastern areas of Queensland including Brisbane and coastal region to Rockhampton - particularly prevalent along the entire coast-line, along the Great Dividing Range and western slopes.
Nest Location - this white ant 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 white ants are also known to attack such timber in damp sub-floor areas.
Area of Distribution: Commonly found in eastern NSW and south eastern Queensland - 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.
Area of Distribution: Commonly found throughout NSW, the ACT, Victoria, and southern parts of South Australia and Western Australia - 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 white ant, Cryptotermes brevis, is rarely located in NSW, once in Sydney in the early 1980's. Specialist eradication procedures involve wrapping the entire building in plastic and using methyl bromide fumigation.
|If You find Subterranean Termites do NOT disturb them|
Subterranean termites have acute survival instincts. If severely shaken
up or disturbed, the Subterranean termites will abandon that area and
move on to secretly cause damage in other areas in the building. If you
find subterranean 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 white ant / termite bait to live subterranean termites
|Learn about other common household pests|
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