This post contains a summary of trap counts for Aug 1-7, 2019.  The numbers reported are number of SWD per trap.

The regional monitoring program is being conducted in berry and stone fruit crops and grapes in Essex, Chatham-Kent, Norfolk, Niagara, Durham, Ottawa/Carleton and Northumberland counties.  It will gradually shift to stone fruit and grapes as the season progresses.

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.

We have placed 4 traps with commercial SWD lures at each site.  The contents are counted each week using dissecting microscopes by my peerless crew.  The feature image shows non-SWD on the left and female SWD on the right.

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.  Click here for instructions on doing this test.

Once sustained catch occurs (two weeks in a row with SWD) 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.

CountyCropCrop stageNumber of SWD per trap
July 11-17July 17-25July 25- August 1Aug 1-7
EssexField raspberryharvest complete40F, 5M4F, 2M14F,4M10F, 3M
Peachharvest38F, 10M12F,7M020F, 13M
Wildn/anot reported86F, 115M42F,10M165F, 113M
Plumgreen fruit30F, 16M10F, 1M2F, 1M48F, 27M
KentWild Hostn/anot reported28F, 39M5F, 5Mnot reported
Raspberryharvest complete3F3F8F, 2M16F, 10M
Blueberry3rd harvest3F, 1M4F, 6M013F, 8M
Strawberryturning colour16F, 5M9F, 5M3F, 18M1F
NorfolkWild raspberryn/a7F, 7M16F, 19M18F, 23M26F, 46M
Blueberryharvest23F, 4M45F, 36M7F, 7M194F, 92M
Blueberryharvest4F, 3M35F, 17M62F, 4M142F, 42M
Blueberryharvest9F50F, 17M64F, 12M70F, 35M
NiagaraStrawberry1M3F11F, 14Mretired
Wild5F, 10M12F, 8M12F, 73Mretired
Strawberryharvest04F2F, 1M21F, 15M
Wildn/a5F, 1M14F, 16M7F, 5M20F, 50M
NiagaraWildn/a17F, 7M42F, 6M74F, 14M42F, 44M
Mulberryripe19F, 1M26F, 10M110F, 60M47F, 66M
Raspberryripe59F, 16M25F, 19M425F, 48M169F, 59M
Peachripe6F18F, 8M108F, 60M
NiagaraCurrantripe2F24F, 3M7F, 2M115F, 53M
Blackberryturning colour3F58F, 19M68F, 15M31F, 30M
Raspberryripe3F22F, 9M40F, 5M60F, 26M
Nectarine7F, 8M32F, 28Mretired
NiagaraApricotripe1F11F, 14M2F29F, 25M
Plumturning colour2F, 2M61F, 25M45F, 11M22F, 6M
Nectarineripe1F14F, 17M4F, 1M29F, 22M
Peachripe020F, 18M12F, 2M24F, 9M
Cherry 2F, 1M37F, 6M37F, 18Mretired
NiagaraPeachturning colour02F2F18F, 10M
Peachturning colour3F2F, 1M1F, 2M104F, 91M
NiagaraRaspberryripe3F15F, 12M18F, 6M66F, 55M
Raspberryripe0not reported53F, 63M29F, 29M
nectarineripe43F, 55M
peachgreen fruit27F, 56M
peachgreen fruit82,F, 21M
Niagaranectarineripe10F, 4M
peachturning colour2F, 1M
peachripe7F, 7M
apricotharvest15F, 19M
Durhamwild0not reportednot reportednot reported
Blueberry1Fnot reportednot reportednot reported
Blueberry1Fnot reportednot reportednot reported
Blueberry0not reportednot reportednot reported
NorthumberlandWild8F, M1not reportednot reportednot reported
Raspberry8F not reportednot reportednot reported
Raspberry1Fnot reportednot reportednot reported
Strawberry3F, 1Mnot reportednot reportednot reported
OttawaStrawberry01F, 5M1F, 1Mretired
Strawberry015F, 13M11F, 32Mretired
Strawberry1F10F, 15M5F, 10Mretired
Wild1M22F, 56M12F, 69Mretired

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.


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