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Keep Malathion Away From Canola Storage

The Canola Council of Canada is reminding growers to keep their canola storage bins free of the insecticide malathion this fall.

Malathion is not registered to treat bins that will store canola or to control insects in stored canola.

Every country that buys Canadian canola sets limits on pesticide residues, and exceeding those limits can mean rejected shipments and increased monitoring.

Last year Canadian canola seed exports amounted to over $3.1 billion and detection of residues could cost the industry, including farmers, millions of dollars in business.

If a bin has been treated recently with malathion, it should not be used for canola storage this fall because a minimum of six months must pass before a malathion-treated bin can be used to store canola.

Lawson advises using proper harvest and storage management to keep canola seed insect free:

Adjust combine settings to harvest sound seed and to minimize chaff and weed seeds in the sample.

Choose bins in good condition and sweep out thoroughly before harvest; make sure the bin is free of chaff, seeds and foreign material.

If considering a bin treatment, a registered diatomaceous earth product can be used to treat empty bins but should never be used directly on canola seed as the product will not be effective.

If canola going into the bin is sound and reasonably free of chaff, volunteer cereal or weed seeds, foreign material, and stored product insects, it should store well and remain insect free if kept below 15C and eight per cent moisture.”

For more information on proper canola storage and keeping canola Export Ready, go to



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