This post contains a summary of trap counts for June 18-24, 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, 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 last week (one week earlier in Essex Co) 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 low numbers in traps in Essex, Chatham-Kent, Norfolk and Niagara.  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.

County Crop where SWD traps are located (most recent growth stage)SWD per trap (F=female, M=male)
Week collected
June 18June 24
EssexGreenhouse raspberry (End harvest)04F
Field raspberry (1 st ripe berries)00
Peach (Pit hardening)00
Wild host04F
Chatham-KentWild host00
Raspberry (turning colour)02F
Blueberry (turning colour)00
Strawberry (ripe fruit)02F
ElginStrawberryNot reported0
StrawberryNot reported0
StrawberryNot reported0
Wild hostNot reported0
NorfolkBlueberry 00
Blueberry 00
NorfolkWild raspberry Not reported0
CherryNot reported0
CherryNot reported2F
CherryNot reported8F
Niagara (South)Strawberry0Not reported
Wild 00
Strawberry (Green fruit)00
Niagara (West)Cherry (June drop)00
Mulberry (Fruit changing colour)00
Raspberry (Green fruit)00
Niagara (East)Cherry (June drop)00
Currant (Green fruit)00
Gooseberry (bloom)2F0
Raspberry (Green fruit)00
DurhamUnspecifiedNot reported0
NorthumberlandUnspecifiedNot reported0
Ottawa/CarletonNot reported
NiagaraApricot (Turning colour)Not reported0
PlumNot reportedNot reported
Nectarine (Green fruit)Not reported0
Peach (Green fruit)Not reported0
Cherry (Green fruit)Not reported0
NiagaraPeach (June drop)Not reported0
Peach (June drop)Not reported0
Cherry (June drop)Not reported0
Cherry (June drop)Not reported0

Click SWD update June 24 2019 to access a pdf version of this report.

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