Queensland Fruit Fly Postharvest Clean Up

Published on 19 April 2024

Summer has now finished but that does not mean we should forget about fruit fly problems. Looking after fruit trees is a year-round activity and once the harvest is finished, it is time to think about cleaning up trees and pruning.

Cleaning up after harvest to ensure that you can prevent flies emerging from the last of the fruit such as apples, quinces and citrus. Pruning trees in Autumn is also key to making it more manageable and easier to net the tree for next season.

As deciduous trees and vines lose their leaves and are exposed to the elements, Queensland fruit fly will look for shelter and protection from the cold weather as they are not active below 16 degrees. Spreading evergreen trees with large leaves e.g., avocadoes, citrus, loquats, or native vegetation, may be a safe refuge as cold weather sets in. These plants provide a warmer area with protection from heavy frosts, rain and cold winds, moisture and predators. They will also look for refuge around buildings e.g., sheds and houses that are heated during winter.

Look out for the lemon tree near the house or sheds as this is an ideal place for fruit fly to over winter.
Keeping on top of fruit fly is a year-round task and home gardeners need to be vigilant to ensure that the next fruit harvest season is not spoiled by fruit fly.