Fighting Back Against Fruit Fly: A Community Learning Experience in Broken Hill
I attended a public fruit fly workshop in Broken Hill hosted by Western Local Land Services and supported by Broken Hill City Council. The session was led by horticultural entomologist Andrew Jessup, who has studied fruit fly for over 40 years, along with Dr. Salman Quddus. The workshop provided practical information for backyard gardeners and growers about identifying and controlling Queensland Fruit Fly (QFF). With only twelve attendees, the small group setting allowed for detailed discussion, demonstrations, and the opportunity to learn practical techniques to protect backyard fruit and vegetable crops.
Capacity building - LEP23-021-24
The issue
Broken Hill has seen a dramatic rise in Queensland Fruit Fly over the past two decades. The area previously had almost no fruit fly population due to strong monitoring programs and a dedicated officer who managed outbreaks by inspecting and spraying backyard fruit trees. Today, gardeners struggle to grow fruit and vegetables such as peaches and tomatoes without infestations. Changes in pesticide regulations and wetter summer conditions during La Niña periods have created ideal conditions for fruit fly breeding. The problem has caused frustration for home gardeners and highlights the need for coordinated community action to manage the pest.
The solution
The workshop focused on practical, low-cost strategies gardeners can use to reduce fruit fly numbers. Participants learned how to identify fruit fly activity, understand their seasonal behaviour, and implement management techniques. These included using protein bait traps, particularly in winter when flies are vulnerable, and placing traps in shaded areas. Other methods discussed included netting fruit trees, removing unused fruit trees, mowing fallen fruit to break breeding cycles, and using garden sprays such as garlic solutions or pyrethrins. Community involvement was strongly emphasised, as fruit fly control is far more effective when gardeners across an area work together to reduce breeding opportunities.
The impact
The workshop provided valuable knowledge that empowers backyard gardeners to better manage fruit fly populations and protect their crops. Understanding the life cycle of the fruit fly including their ability to lay up to 2,000 eggs in a six-week lifespan, highlights the importance of early intervention. By implementing simple strategies such as trapping, fruit hygiene, and netting, gardeners can significantly reduce infestations. Increasing awareness and participation within the community is essential, as fruit fly control requires a coordinated effort. Improving management practices may also support broader goals such as protecting regional produce and maintaining fruit export opportunities.
Key facts
- • Queensland Fruit Fly can lay up to 2,000 eggs in six weeks.
- • Flies live 4–6 weeks in summer but can survive months in winter in sheltered trees like citrus.
- • Mating occurs at dusk when temperatures exceed 15°C.
- • Eggs hatch quickly, with 2–13 eggs laid in each puncture in fruit.
- • Fruit fly populations thrive in warm, humid conditions following summer rain.
- • Effective control requires community participation.