Biosecurity Threat of Seeds in the Mail

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A range of vegetable and fruit viruses have been detected in seeds from overseas, demonstrating the significant biosecurity risks that illegal seed imports can pose.

Australian Chief Plant Protection Officer, Dr. Gabrielle Vivian-Smith, said a variety of seeds were imported for testing and research purposes, and the majority carried viruses of concern. Seeds are the most intercepted biosecurity risk item through the mail. Last year over 55 thousand intercepted mail articles contained seeds, equating to 72 per cent of the total interceptions for the period. Through this testing, we now know the reality of the risks that we were potentially facing. Cucumber, melon, and zucchini seeds that were ordered online from overseas were tested for selected viruses that are a biosecurity and agronomic concern.

The viruses that were detected in the seeds include the Melon necrotic spot virus, cucumber green mottle mosaic virus, Squash mosaic virus and potyviruses. One or more of the target viruses were detected in 23 of the 31 seed lots that were tested. These viruses are a significant risk to Australia’s vegetable and fruit industries, backyard gardens, our environment and overall plant health.

If these seeds were bought by members of the public and planted, it could have led to some devastating results. Some seeds cannot be imported to Australia, as the risk of introducing unwanted plant diseases and serious weed species is too high. Others can provided they meet strict import conditions. The border helps manage the risk of illegal seed imports, but everyone has a role to play in following our conditions.

Illegal imports of seeds can be subject to enforcement action by the department. There are significant penalties if you are found to have breached Australia’s biosecurity conditions. This can include fines and potential prosecution.

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