Monitoring for adult SWD

A number of monitoring traps have been tested in the UK and this is likely to continue as newer, improved traps are developed. Experience to date suggests that the most practical trap which is easy to use and effective at catching spotted wing drosophila is based on the new Droso Trap (pictured).



















Click here to view instructions on how to assemble the new Droso trap.


Watch our video to find out how best to use bait for spotted wing drosophila traps:



If you are unsure whether or not you have caught SWD, samples of the adults can be sent to the entomology team at East Malling Research for confirmation (English Growers) or to Alison Dolan at the James Hutton Institute (Scottish Growers). All such samples will be treated in confidence by both EMR and the James Hutton Institute.


If submitting samples caught in the liquid bait, the adults can be removed by pouring the liquid through a sieve over a sink. The adults should then be placed in a small sample tube with some liquid bait, which can be sent through the post in a Jiffy bag.


Research is currently being done to find the optimum baits for our conditions and crop types and this site will be up-dated as new information becomes available.


Our video explains how best to check your traps:




How and where to use the traps


At the start of the production season, it is best to use traps in wild areas of the farm, such as hedgerows and woodland. Traps in wild areas should be hung 1 metre above ground level and out of direct sunlight. Clear any tall vegetation away from the trap so that it’s easily accessible. As soon as high populations are being caught in wild areas or in perimeter traps, then start monitoring in crops, but not until fruits start to swell.


Use two traps per cropping situation about 10 metres from the perimeter of the crop, but remember that traps should be hung on the shady side of crop rows. Precision monitoring traps can also by placed around the perimeter of the crop in adjacent wild areas at a 2 metre spacing (see Crop Management and Control section).


  • In stone fruit, cane fruit and bush fruit crops, hang the traps at one third of the canopy height.

  • In outdoor strawberry crops, position above the ground but below the spray boom height.

  • In tunnel strawberry crops, hang in the leg row at a height of 10 cm.


Watch our video for more information on where to place the traps: