Trevor Cochrane's tips for tackling fruit fly
Never allow fallen fruit to remain under the tree. Identify any fruit that have been stung on the tree and place them in a plastic bag, seal it and leave it in the sun to solarise the larvae.
Recipe for Baits>/b>
Bait one. Add 50gm (ten teaspoons) of sugar into litre of boiling water. When tepid, add 5 grams of dry yeast or 1 tablespoon of vegemite.
Add a tea spoon (5ml) of ammonia or fenthion. Place concoction into a 2 litre plastic drink container that has had the top out off and reversed and placed downwards back into the bottles body.
You will have to use at least three baits per tree. (Make bait jars from old plastic cool drink bottles.) Replace baits fortnightly as the fruit.
Strip sticky baits have proven effective if they are yellow and at least five are hung from a tree.
It is believed that fruit fly are colour blind with limited colour selection ability. Apparently yellow, orange and blue are all spectrums they can see and identify with ripening fruit.
By adding brightly coloured sticky strips in these colours you will find that the fruit fly head to the strips before they attack fruit. Because its sticky they stick to the glue (or honey) and cannot attack fruit.
Fruit fly exclusion bags are also something that can be effective in protecting your valued fruit. These fine mesh or cloth bags act as a barrier to getting to the fruit when they are tied around each individual fruit.
They are available on line from companies like green harvest www.greenharvest.com.au and cost around 56c each.
An Integrated Approach
The best approach to controlling fruit fly probably comes with a combined approach. There is no doubt as home gardeners we all play our part in supporting our local orchardists by ensuring we protect our fruit from this pest and ensuring it doesn't breed and proliferate.
If you have a fruit tree and feel you cannot manage to control attacks and you do not want it, we have a fruit tree removal service that could see it transplanted or removed to ensure it doesn't present problems in the future in your garden.