an initial thorough inspection of the buildings and surrounds,
the installation of a chemical soil barrier at the base of the building,
drilling of trees and stumps to eradicate any white ant nest found therein,
the installation and monitoring of a white ant colony elimination system,
application of borate chemical to accessible structural timbers,
various non-chemical building site modifications,
regular follow-up inspections and maintenance of the control methods,
installation of physical barriers and other devices during construction.
Firstly, it is essential for the white ant controller to complete a thorough inspection of the buildings and surrounds, in accordance with the Australian Standard 3660.
AS 3660 requires the property owner to be supplied with a written inspection report and detailed specifications for an integrated white ant control program. It is a legal requirement that (1) such an inspection and report be carried out prior to a chemical soil treatment, and (2) only a Govt WorkCover licensed pest controller may supply the chemical soil treatment.
The cost of a white ant inspection report and quotation / treatment recommendations is usually around $150 to $250, depending on the size of the premises. Some companies offer a "free inspection" but inevitably meet the cost from subsequent services to property owners who accept the quotation / treatment proposal.
An inspection of a building for signs of white ant activity often has physical limitations. white ant entry into the building may be through areas inaccessible to inspection, such as, via expansion joints or cracks in concrete (on-ground flooring), in-fill patios or enclosed wall cavities. White ants often enter a building via external weep holes in wall cavities, particularly where lawns, garden beds, concrete pathways or paving obscure such weep holes.
white-ants often build their colony nest inside an in-fill patio - a prime feeding site as builders traditionally dispose of the timber off-cuts inside the patio with soil placed therein and the concrete floor thereon. This also creates a perfect humi-crib breeding site for white ants. From this location the white ants can gain undetected access to the wall and roofing timbers. White ants are extremely secretive - readily trailing under floor tiling, carpets, parquetry to get into the wall and roofing timbers.
AS 3660 requires the white ant inspection report to note any visible evidence found of white ant activity, including possible white ant entry points that are inaccessible to inspection and the inspector's recommendations for white ant control treatments.
The chemical soil treatment involves treating the soil at the base of a building with a registered chemical that will prevent white ants travelling through that soil to get to the timbers in the building above.
If there are white ants in the building, at the time of chemical soil treatment, they cannot safely return to their central colony nest via chemically treated soil. White ants are compelled to regularly return to their nest in the ground to obtain moisture essential for their survival and to feed and groom the nymphs (young white ants), the king, queen and other white ants.
The installation of a chemical soil barrier requires expert knowledge and specialised equipment to form a complete and continuous barrier to protect the building from a white ant entry and infestation - as illustrated below:
Special care needs to be taken to ensure a subsidiary white ant nest is NOT contained within the building, such as in wall cavities. This may occur where there is an independent moisture source within the wall cavities, for example, from to a leaking shower recess, broken roof tiles or faulty guttering.
Recent industry surveys suggest that about one third of all unprotected properties are subject to attack by white ants. Severe white ant damage to Australian homes is on the increase due to recent changes in the type of chemicals allowed to be used and building construction materials and design that encourage hidden white ant entry and infestation.
There are three chemicals registered by the relevant Federal Government - National Registration Authority for use in white ant control as a soil treatment chemical, namely;
WARNING: Both Dursban (chlorpyrifos) and Biflex (bifenthrin) are solvent based pesticides which can cause health problems to asthmatics during the drying process. Both Dursban and Biflex are Schedule 6 Pesticides with a "POISON" label rating.
CONSUMER NOTE: With white ant nest location and colony elimination, there can be no guarantee of certain protection of nearby buildings, as there may be other unlocated hidden white ant nests near your property, for example, in trees on neighboring properties that cannot be accessed. There also maybe a white ant nest located under concrete slab flooring or within enclosed patios of your property or your neighbouring property.
Intrigue white ant dust is manufactured by Bayer as an Australian product tested against Australian white ants. Intrigue works to prevent the white ants from moulting and growing a new exoskeleton, essential for their survival. The queen and the destructive workers are the first to die and without them the colony is doomed.
The Eco-Safe White Ant Colony Elimination System involves:
Regular inspections of the property, buildings and accessible timbers, therein.
Application of Intrigue white ant dust to white ant galleries and any live white ants found at each inspection, at intervals as recommended. White ants return to the nest and pass the dust to other white ants through mutual grooming and feeding. The larger the number of white ants that are dusted, the quicker and more certain is the white ant colony elimination process. It is usual to reinspect the area in about four weeks, to observe the result and reapply the Intrigue dust, if neccessary.
Drilling susceptible trees, and the application of Intrigue white ant dust to any white ant nest or live white ants located therein.
Follow-up application of a chemical soil barrier to Australian Standard 3660 using Premise soil treatment chemical at the base of a building or other structures.
Installation of EcoSafe white ant stations to monitor future white ant activity. Any live white ants subsequently found in the stations are dusted with the Intrigue white ant dust.
The EcoSafe white ant stations contain an attractive timber food source for foraging white ants, and are positioned in areas judged by the white ant specialist to be an area conducive to white ant activity. This requires expert skill and judgement, based upon years of field-work experience in white ant control.
The installation and monitoring of the EcoSafe white ant stations is essential to guard against other white ant nests within the area that may pose a serious threat to the building or other timber structures.
We recommend the use of the Intrigue or the Exterra products due to the following circumstances.
Intrigue and Exterra white ant baits non-repellant to the white ants and is of very low toxicity to humans. Intrigue white ant dust is exempt from the "POISON" labeling requirements of the pesticide regulations and is classified as a schedule 5 pesticide with a CAUTION notation only on the pesticide label.
Arsenic dust is a highly toxic compound that white ants can detect and therefore avoid; arsenic is a stomach poison able to quickly kill white ants on contact. As the white ants can detect where the arsenic dust is coming from they can easily seal off that area from the white ant colony nest, giving the property owner a false sense of security. The white ants can enter the building through other locations.
Intrigue and Exterra are insect growth regulators which are slow acting on the white ant (several weeks) during which time the white ants readily transfer the Intrigue or Exterra white ant bait back to the other white ants in the colony. The affected queen white ant stops producing viable eggs and is assassinated by the workers. As these products are spread to other white ants in the colony during their feeding and grooming process....the eventual elimination of the white ant colony is expected in most cases where a large amount of white ants are feeding on the bait.
Intrigue white ant dust can be applied directly to live white ants in their mud tube galleries or infested timbers, whereas the Sentricon baits are placed in their in-ground bait stations after removal of the white ant infested timber therein. This can involve major disruption of the white ants which can cause them to avoid the in-ground Sentricon bait station, entirely. This serious short-coming is overcome by the patented Exterra White Ant Stations where the timber is aligned around the cylinder such that the bait can be inserted without such disturbance of the white ants present. For detailed information on Exterra White Ant Colony Elimination System ... Click Here
With the application of the Intrigue white ant dust there is no time delay from the time of the initial application to the worker white ants taking the Intrigue white ant dust back to the white ant colony. This means, in terms of treatment application time, the Intrigue white ant dust has a faster effect on the white ant colony.
Another significant difference, is that Intrigue white ant dust is 80% active anti white ant chemical, whereas only 0.5% of Sentricon bait is active anti white ant chemical, due to repellency problems with the Sentricon bait at significantly higher dosage rates.
The Australian white ant control industry has used Premise as soil treatment chemical for more than five years and Intrigue white ant dust, for several years, with excellent results reported in the vast majority of circumstances.
Intrigue white ant dust is an Australian product designed for use against Australian white ants. Sentricon was developed for use against American white ants, a different species that are not as disturbance wary as the destructive Australian white ant species.
The direct application of Boracol, a borate chemical formulation to accessible timbers can prevent white ant attack to the treated timbers. Boracol is non-toxic to humans (mammals) and is designed upon contact to penetrate inside most building timbers. Life expectancy can be in excess of 20 years. Boracol also prevents fungal wood decay, borer attack and has some fire retardant properties.
This application of Boracol is highly recommended (1) to timbers during construction, and (2) to existing buildings in situations where a complete chemical barrier cannot be installed, such as, the sub-floor and void timbers of attached terraces or duplexes. In addition, the product is ideally suited to environmentally sensitive locations.
Therefore, it is essential for the home owner to carry out the following "non-chemical" recommendations.
Moisture reduction underneath suspended floors and around the base of the building. This may include improving cross flow ventilation to the sub-floor, fixing any leaks from bathroom, kitchen, down pipes, guttering, air conditioning unit overflow etc, installation of age-drains in the sub-floor and at the base of the building.
Removal of any timber in contact with the soil. Timbers should be stored above the ground so you can inspect underneath.
Inspection access - Make sure with concrete slab on ground flooring that you can inspect the entire external slab edge for evidence of white ant mud-shelter tubes; also ensure where ever practicable that unimpeded inspection of sub-floor (suspended floors) can be undertaken to look for evidence of white ant activity.
PLEASE NOTE: If you find live white ants or white ant affected workings DO NOT disturb the area as the white ant controller can introduce Intrigue or Exterra white ant bait to the live white ants present in an attempt to eliminate the white ant colony. If disturbed the white ants are likely to move elsewhere, and not be rediscovered until further obvious damage has been done.
A professional white ant inspection and report could save you thousands of dollars - specific areas inspected include accessible timbers within the sub-floor, roof void, exterior and interior of the building, other timber structures, fences and trees within a 50 metre radius of the buildings but within the property boundary.