31.1 I am here too – Woodworm control – let's give numbers leave to speak

10/07/12

Many people ask for details about the contents of the active ingredients in our formulations, and according to CTS' policy, we always communicate in a transparent way and provide such data unless they are bounded under patent (within patent) restraints and in those cases they are not effective on the evaluation of the product.

As reported on the table below, almost the majority of the popular products in use for the woodworm control are based on permethrin 25/75 cis/trans (Cas 52645-53-1, EINECS 258-067-9), a synthetic molecule, well known as an efficient insecticide, acaricide and insect repellent (including wood worms, termites, ants, fleas and cimexes, cockroaches, mosquitoes) and pretty safe for end users. In general, it has a low mammalian toxicity and is poorly absorbed by skin. Even the most popular fumigant, known as Copyr-Smoke, contains this active ingredient: note that fumigation is a method of pest control that completely fills an area with gaseous substances and kills flying bugs but that cannot be effective inside the wood features cross sections, even if they are porous like the fabric of clothes. Therefore fumigants do not work when infestation is in progress because cannot kill the eggs and grubs inside the materials.

All the products need to be certified and registered with the Ministry of Health (Italy) and labeled with a specific registration code (the so called Presidio Medico Chirurgico – P.M.C.).
The cost of the products is mainly based on the amount of the active ingredient (the solvent is just the temporary transporting medium, what matters is the disinfectant agent) so 'be careful when checking the supplier's quotations'.

Denomination          Seller          P.M.C.            Active ingredient (%)         Tot. Active ingredients (%)
Per-Xil 10                   CTS            18496               Permethrin (0,40)
                                                                  Piperonyl Butoxide -PBO-(0,06)                
0,46
Permetar                  Phase           15806            Permethrin (0,38)                              0,38
Xilores                    Antares          18709             Permethrin (0,38)                             0,38
Timpest                 Mazzoni          18744             Permethrin (0,32)                              0,32
Xirein                    Bresciani         18719             Permethrin (0,25-0,30)                   0,25-0,30
Sinotar                   Sinopia           18765             Permethrin (0,25-0,30)                   0,25-0,30
Xilamon                     ICI              13816             Permethrin (0,25)                               0,25

After the clearing up of that point, it is now necessary to talk about Piperonyl Butoxide (PBO), a component that makes Per-Xil 10 unique as a woodworm controller. Despite having no pesticidal activity of its own, it enhances the potency of permethrins, by inhibiting the natural defense mechanisms of the insect; in other words it binds to the enzymes such as Cytochromes P450 and decrease their ability to degrades insecticide molecules.

Sun light and high temperatures as well as those enzymes may reduce the power of permethrin; Piperonyl Butoxide is effective and reinforcing agent under those negative conditions too.
Piperonyl Butoxide is well accepted by Organic Farming (regulation CE 834/2007), it is approved by Ministry of Health for specific purposes. Because its low toxicity, PBO is not considered on point 3 of the safety data sheet.
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