A SIMPLE fumigation technique could rid grain silos of insects much more effectively than conventional methods. Entomologists unveiled the technique, called Siroflo, at Moree in New South Wales, Australia, this week.
Siroflo, which was developed by researchers at Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO), involves pumping low concentrations of phosphine gas mixed with either nitrogen or carbon dioxide through the grain at a constant rate.
The technique promises to be a boon to farmers all over the world because insects in many countries are proving resistant to phosphine as the pesticide is currently applied. Bangladesh, Pakistan and India, in particular, have been reporting that insects are becoming resistant to phosphine.
At least 80 species of beetles, moths and mites can infect the grain. According to scientists at the CSIRO, the insects build up resistance unless they are exposed to a steady concentration of phosphine.
Bob Winks, head of ...
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