UMass Extension Fruit Advisor Program

Spotted Wing Drosophila - Introduction

Spotted Wing Drosophila (Drosophila suzukii), SWD, is a recently introduced new species of fruit fly in the United States. It was first found on the west coast in 2008, but has rapidly colonized many fruit producing regions of the country. It was found in New England in late summer 2011 shortly after Hurricane Irene and caused significant crop damage in fall raspberries among other crops. While fruit flies (or vinegar flies) are nothing new in the US, this species is different in its ability to infest healthy fruit. Other species typically infest over-ripe or damaged fruit. Females of this species have serrated ovipositors that can cut into healthy fruit to insert eggs. This can lead to problems with deteriorating fruit in the field or with customers who find multitudes of larvae in fruit after harvest.

A comprehensive Webinar produced by Cornell University on Getting Ready for Spotted Wing Drosophila: Understanding Risks for Small Fruit Crops and Current Management Options from April 2012 can be viewed by clicking on the title. 

For more information on SWD identificaiton, biology, monitoring and management, click on the modules below that provide detailed up-to-date information and links to resources.

Spotted Wing Drosophila Spotted Wing Drosophila Spotted Wing Drosophila
ID and Biology Monitoring Management