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Spotted Wing Drosophila Trap -

A new pest of fruit crops to monitor & trap The spotted wing drosophila (SWD) is a new fruit fly which can affect strawberries, raspberries, blackberries, currants, blueberries, grapes, cherries and plums. Recently arrived in the UK, it is similar in appearance to the normal fruit flies, but differs in that the adult males have a distinctive spot on each wing and the adult female has a saw-like appendage which is used to pierce the skin of developing fruits to lays eggs under the surface. The red eyes are also distinctive. The developing stages of the pest can damage the fruits at the time of ripening, causing the fruit to go mushy and rotten.

Spotted Wing Drosophila (male) The pest is most likely to be found during warm (20oC +) and humid weather conditions. The fly can be difficult to control, it is therefore important to monitor for the adults before they lay their eggs. The ideal way to monitor for their appearance is to use a special trap. Traps and lure are available in the UK from Agralan. Monitoring with these traps should be carried out from April until November. Experience has shown that it is helpful to group two or three traps together. In cherries, plums, currants, blueberries, raspberries, blackberries and other hybrid berries, it is best to put the traps on the shaded side of the row.

Spotted Wing Drosophila trap. In small fruit plots typically found in gardens, the use of several of these traps for precision monitoring positioned around the perimeter of the fruit growing area can help to attract the adults away from the plants and developing fruits, reducing the likelihood of fruit being affected. When checking your traps to see if any SWD have been caught, it is best to pour the liquid contents through a sieve over the kitchen sink. Spray with water using a hand plant mister. Allow the insects trapped in the sieve to dry before shaking them over a white tray or card to examine them. You can then use a hand lens or magnifying glass to inspect the adults, checking for the distinctive black spots on the adult males. (Females require a microscope to be identified).

If SWD adults are found in the traps, you should take steps to stop them from laying eggs in developing fruits. In and around fruit plots, you can exclude SWD from entry to the fruit area by erecting very fine mesh netting (less than 0.98 mm) eg Enviromesh ‘UltraFine’ or Tendamesh from green fruit onwards to protect the fruits from the adults. Alternatively you can use garden care products to control the adults. It is important to note that spraying alone is unlikely to give control. It is much more effective to use a combination of monitoring, exclusion, trapping and spraying. Avoid spraying whilst plants are in flower to protect pollinators, but start from green fruit onwards. A number of products are available from garden centres, see also https://www.rhs.org.uk/advice/pdfs/pesticides-for-home-gardeners for further advice.

In addition to taking steps to monitor, exclude by netting and trap the fruit fly, it is very wise to maintain good levels of hygiene in and around your fruit plants to avoid attracting the pest into your garden. Aim to pick fruit when it is ripe and don’t allow old, damaged or diseased fruits to remain on the plants or lie on the ground close to the plants. Remove overripe fruits and all waste and dispose of responsibly.

Do not dispose of fruit on a compost heap as this will attract more spotted wing drosophila into your garden. Kill any larvae first either by putting in sealed plastic bags and leaving in full sun for a few days, or the freezer overnight.

Spotted Wing Drosophila | Spotted Wing Drosophila trap | Spotted Wing Drosophila Attractant |

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The Larvae of SWD can cause damage to cherries and many soft fruit crops. Use these traps from March onwards to trap adults and reduce egg laying. Trap is re-usable, attractant included.

Disclaimer: An insect monitoring trap is not guaranteed to prevent infestation of your crop. The trap is not designed for use as an exclusive method of preventing infestation and the benefits to be gained from the use of a trap will depend on various factors including the skill and diligence used in acting on results in the correct timeframe and positioning of the trap or traps. Due to this and the vagaries of nature we cannot accept responsibility for the results obtained from the use of a trap.

Product Price inc VAT
Spotted Wing Drosophila Trap £9.99 incl. VAT
Spotted Wing Drosophila Attractant £8.00 incl. VAT

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