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Writer's pictureDebbie Benefield

BEATING RISING PHOSPHINE RESISTANCE

The first phosphine resistant species detected in grain stores in NSW was found in 2007, and the last decade in farming across Australia has seen a dramatic rise in phosphine resistance pest species.

With markets expecting high-quality grain that shows no signs of pest infestation, growers have turned to a heavy, often misuse of phosphine, to ensure the highest quality, pest-free grain.

This reliance, however, seems to be what is leading to phosphine resistance in pest species; predominantly lesser grain borer, rusty grain beetle, rust red flour beetle, rice weevil and saw-toothed grain beetle.

There are several reasons for the rise in phosphine resistance in grain stores, detailed below:

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