Spring into action as biosecurity risks change

With spring approaching, Australian growers and agronomists are gearing up for a busy season. Longer days and warmer weather bring fresh growth and opportunity but also heightened biosecurity risks. From increased fruit fly pressure in fruiting crops to the looming threat of exotic pests such as Brown marmorated stink bug (BMSB), the months ahead call for renewed vigilance.

Warmer weather accelerates pest activity. Aphids, thrips and whitefly thrive in spring and summer conditions, transmitting viruses across crops. Moisture and storms also drive rusts, mildews and blights, while fruit fly pressure rises as crops mature. Two species are of particular concern: the Queensland fruit fly (Bactrocera tryoni), found across the Northern Territory, Queensland, New South Wales and Victoria, and the Mediterranean fruit fly (Ceratitis capitata), restricted to Western Australia. Both can cause severe crop losses if left unmanaged. For identification support, visit Fruit Fly Identification Australia.

Seasonal threats are not limited to pests already here. BMSB, one of the world’s most invasive insects, is most active in spring and summer overseas and could enter Australia on imported goods. Its spread would have serious consequences for horticulture and broadacre crops.

On-farm, more machinery and people move between properties at this time of year. Without strict hygiene, these movements can transfer seeds, soil, weeds and pathogens from one site to another. Simple steps such as cleaning equipment, sourcing from trusted suppliers, restricting access and training staff to spot unusual symptoms can make a difference. If you see something unusual, report it immediately via the Exotic Plant Pest Hotline on 1800 084 881.

Seasons shift, and so do biosecurity risks. From fruit fly and fungal outbreaks to exotic threats like BMSB, vigilance in spring and summer is critical. By staying across the list of National Priority Plant Pests, tightening on-farm practices and reporting early, growers and agronomists can protect yields today and safeguard Australia’s plant industries for tomorrow.

The Farm Biosecurity website has practical tools to help you stay ahead this season.