Berries Grapes Pest Management Tender Fruit

Spotted Wing Drosophila Update, July 3-July 11, 2019

This post contains a summary of trap counts for July 3-11, 2019.  The numbers reported are number of Spotted Wing Drosophila (SWD) per trap.

The regional monitoring program is being conducted in berry and stone fruit crops and grapes in Essex, Chatham-Kent, Elgin, Norfolk, Niagara, Durham, Ottawa/Carleton and Northumberland counties.

The monitoring project is supported by a grant from the Canada Adaptation Program and collaboration among Niagara Peninsula Fruit and Vegetable Growers Association, Ontario Tender Fruit Growers, Eastern Ontario Berry Growers, Grape Growers of Ontario, OMAFRA staff and private consultants.

Traps were first deployed in early June in berry and stone fruit blocks.  We have placed 4 traps with commercial SWD lures at each site.  Use these results in addition to your own monitoring program to determine when SWD is present on your farm. Conduct a salt water test or a plastic baggie test to confirm presence of larvae in fruit.

SWD has been identified in  Essex, Chatam-Kent, Elgin, Norfolk, Niagara and Northumberland.  This means that growers with ripening crops susceptible to SWD should consider using a product with activity against SWD in preharvest sprays.  Check the SWD product registrations on our website.


F = female; M = male;

CountyCropCrop stageNumber of SWD per trap  
June 18-June 27June 27-July 2July 3-11
EssexGH raspberryharvest complete4F00
Field raspberryearly harvest03F2F, 2M
Peachgreen fruit04F1F, 1M
Wildn/a4F4F5F, 0M
KentWild Hostn/a04F5F, 0M
Raspberryripe1F14F, 1M51F, 8M
Strawberryripe1F08F, 3M
ElginStrawberry00not reported
Strawberry00not reported
Wild raspberryn/a001F, 4M
NorfolkWild raspberryn/a04F3F
Blueberryripe003F, 1M
NorfolkWild raspberryturning colour08F6F,3M
Cherry1st harvest03F, 2M12F, 2M
Cherry1st harvest2F8F11F
Cherry1st harvest8F4F9F
NiagaraStrawberryripenot reported00
Wildn/a002F, 6M
NiagaraCherryturning colour003M, 3F
Wildn/a02F, 1M0
Mulberryripe05F4F, 1M
Raspberryturning colour001F, 1M
NiagaraCherryripe002F, 1M
Currantturning color000
Goose berrygreen fruit000
Niagaraapricotpit hardening000
plumpit hardeningnot reported2F, 2M1F
nectarineturning colour000
peachturning colour000
Cherry turning colour000
NiagaraPeachturning colour000
Peachturning colour000
Cherry ripe001F
Cherry ripe001F
Blueberrygreen fruitnot reported00
Blueberrygreen fruitnot reported00
Blueberrygreen fruit000
Raspberrygreen fruit001F
Raspberrygreen fruit000
OttawaStrawberryripenot reported00
Strawberryripenot reported00
Strawberryripenot reported00
Wildn/anot reported00


This project was funded in part through the Canadian Agricultural Partnership (the Partnership), a federal-provincial-territorial initiative. The Agricultural Adaptation Council assists in the delivery of the Partnership in Ontario. The Agricultural Adaptation Council assists in the delivery of the Partnership in Ontario.


0 comments on “Spotted Wing Drosophila Update, July 3-July 11, 2019

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: