How to make a fly trap?

As soon as the first heat appears, flies appear. These insects are not dangerous, but flies are particularly painful to endure when they flit around food on the terrace or within the house. Fortunately, it is possible to make homemade fly traps very simply to eliminate these insects or trap them before releasing them into the wild. Discover our solutions.

How to make your fly trap?

To make your fly trap, two possibilities are available to you in terms of container: the plastic bottle and the glass jar.

The fly trap in a plastic bottle

The plastic bottle is the most popular solution for making a homemade fly trap. It is indeed a simple way to attract them.

To do this, equip yourself with a rigid plastic bottle to prevent it from crashing and leaving escape routes for insects. Empty it and remove its cap.

Cut the bottle in half with a craft knife, being careful not to hurt yourself. Ideally, cut at about 1/3 of the height of the bottle starting from the top to leave 2/3 at the bottom.

After placing your bait in the lower part of the bottle, turn the upper part over to form a funnel with the neck and fit it on the lower part. You can fix the two parts together if necessary with a wide adhesive tape to reinforce the effectiveness of the trap and / or to better maintain the whole.

From time to time, open the trap to remove dead flies or to release those that have been caught away from home.

The fly trap in a glass jar

More environmentally friendly, this solution is also very practical for making a fly trap, especially if the intention is to release them out of the house and not kill them. Indeed, this trick leaves the possibility for insects to survive.

In a clean glass jar, pour the ingredient intended to attract flies. It is then sufficient to stretch the opening of the jar with cling film instead of the lid. You can hold it with a rubber band or tape. Pierce the food film with several holes so that flies can enter without being able to come out.

Once the insects are trapped, you just need to release them into the wild.

Whatever trap you choose, hang it up or put it somewhere where flies pass to make sure you trap them better.

What ingredients can you use to lure them into the trap?

Without bait, your fly trap will not work. You must therefore place one or more ingredients there that attract these insects.

The fruit or fruit syrup trap

Flies are attracted to sugar, like many insects. In the bottom of your plastic bottle or your glass jar, pour a little fruit juice, a little fruit syrup or too ripe mashed fruit.

Attracted, the flies enter the trap and drown in the liquid if you opt for this solution or feed on the crushed fruit before getting stuck in the trap. It will then be enough for you to free them or to throw away the dead insects and to renew regularly the preparation.

Be careful, however, as these traps can attract other types of useful insects, such as bees. So be vigilant!


Beer also attracts flies. Pour a little beer so as to fill the bottom of the plastic bottle or glass jar with a height of about 3 to 5 cm. The flies will enter and drown there.

You just need to renew the beer from time to time to prolong its effect.

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