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Special care and equipment can be employed to detect sub-nests in a building incuding a moisture metre, microwave and infrared cameras - however each have their limitations.
There are several varieties of termite control chemicals registered by the relevant State and/or Federal Government Authority for use in termite control for a soil treatment chemical.
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WARNING: Many outdated goods are solvent based termite control dyes which may lead to health issues to asthmatics during the drying process.
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Termidor and Premise do NOT have an obnoxious odour or emit airborne fumes or residues. Both are registered as a low hazard insecticide using a CAUTION notation on the registered tag.
Fipronil, the active ingredient in Termidor, has been used in the USA, Australia and other countries, for flea and tick control on millions of cats and dogs. Termidor and Premise represent modern technology.
Some alternative termiticides possess a strong repellency action to deter foraging termites. Whereas Termidor and Premise are non-repellant into the termites.
Termites can enter the treated soil zone without detecting the Termidor or Premise compound.
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The repellant nature of other goods mean the termites can detect the chemical and will move along the treated soil areas, actively seeking a gap to gain entry into the building.
Premise has been utilized as soil treatment barrier against termites for more than eight years in the USA with excellent results for long term termite control. We are not aware of any significant issues during this age.
Premise will behave to kill termites, in the greater concentration treated soil areas abutting the building. With Premise, termites that forage in the lower concentrated treated soil regions, will become disorientated, cease feeding, and therefore are diseased by natural fungi and micro-organisms in the soil.
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Both Bayer Premise and BASF Termidor assert their goods will transfer from one affected termite to another... the technology aimed at eradicating the queen termite and the entire colony - refer to the animated illustration below:
Termites tunneling in the Premise treated soil area abutting the building (of top concentration - near the point of application) are killed outright.
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Termites tunneling in the outer parts of a Premise treated soil area (of low concentration) will not detect the Premise which adheres to their bodies and has a delayed lethal effect of many days - enough time to be transferred back to the central colony nest.
After 250 million decades of living underground, subterranean termites have evolved with a very thin waxy skin (called an exoskeleton) that readily absorbs moisture.
Premise adheres to the termite exoskeleton and is easily adsorbed via the exoskeleton and into the termite's body to trap and kill the affected termite within a couple of days.
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The termites spread the Premise to other termites during regular physical contact, particularly when working together in close proximity, grooming and feeding the remainder of the colony, a regular function of their daily life.
Termites carry off or cannibalize other dead termites, further spreading the deadly effect of the Premise chemical throughout the colony.
The Sentricon termite monitoring and baiting system was developed by Dow AgroSciences, USA. The Sentricon bait is an insect growth regulator, which can be designed to be spread throughout the colony from the worker termites.
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An insect growth regulator impacts termites by stopping the moulting process needed for the termites to develop. As the worker termites die off, the termite colony declines to the point at which it can no longer sustain itself, ultimately leading to it's collapse and elimination.
The Exterra termite monitoring and baiting system is owned by Ensystex, USA. The Learn More Exterra termite bait is also an insect growth regulator.
Both Sentricon and Exterra systems have their own plastic bait stations which must be utilized with their product. These bait stations can be placed in the ground and assessed regularly.
Termite colony elimination in favourable circumstances may take several weeks to a few months. However, in some instances, termite colony elimination is unsuccessful or might take years, depending on the circumstances. Where a significant number of termites find and connsume the bait, then colony elimination is virtually assured within a couple of months.
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Both the Sentricon and Exterra termite baits are designed to be slow acting, non-repellant and therefore spread to other termites in the colony prior to the colony can discover where anonymous the deadly outcome is coming out of.
Termites have acute survival instincts. The location of a poisonous food source if detected, will be abandoned. An excessive amount of disturbance of these foraging termites (workers and soldiers) in a particular location, will alert the termite colony to abandon the area. The termites seem to be gone, but may in fact be entering the building in other regions.