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In addition to the man-made gases used in pest control, there are a number of atmospheric gases that may be used.
The manipulation of naturally occurring atmospheric gases - e.g. carbon dioxide (CO2) or nitrogen - is often referred to as Controlled Atmosphere Treatment or CAT. CAT requires the total sealing of a structure, whether that be a silo, shipping container or purpose-built chamber.
CO2 can control all life stages of pests, including stored product pests. To achieve such control, the CO2 level must be maintained for the duration of the treatment period. For example, stored grain pests can be controlled if the CO2 level remains above 35% for 15 days1, although the actual dose rate often differs by region depending on the insect, commodity type and temperature2. There is no chemical resistance to CO2 treatments which makes the application viable for long-term use as a fumigant.
CO2 treatments are most commonly used on grain and stored products, although there is an increasing number of treatments on fresh commodities. CO2 leaves no harmful chemical residues on produce, and may be referred to as a natural or organic fumigant depending on the local pesticide regulations in your country. Linde offers a range of supply options for CO2 treatments, ranging from cylinders to bulk tanks. We also offer mobile solutions in many countries.
For more information, please contact your local Linde representative.