This post contains a summary of trap counts for the week of July 23.  Note that unless otherwise noted, the numbers reported are number of SWD per trap rather than total number over 4 traps.  Please refer to previous blog posts for counts from earlier in the growing season.

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

The monitoring project is a collaboration among the Niagara Peninsula Fruit and Vegetable Growers, Ontario Tender Fruit Growers, the Eastern Ontario Berry Growers, OMAFRA staff and private consultants.

Traps are being moved from harvested crops (June bearing strawberry, tart and sweet cherry) into day neutral strawberry, raspberry and blueberry and stone fruit (yellow plum, apricot, peach, nectarine, blue plum).  We have placed 3-4 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 traps in all monitored counties except Stormont/Glengary/Dundas as of July 27.  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. Mako and Malathion have received emergency use registration for this year again and previous blog posts for information on products for managing pre-harvest insects including swd on stone fruit.

F = female; M = male; PH = post harvest

SWD trapped per trap Counties where SWD was found Crops where SWD was trapped
6F, 6M

8F, 6M

8F, 4M

0F, 7M

Essex Strawberry

Raspberry

Plum

Peach

1F, 1M

45F, 122M

7F, 5M

Elgin Strawberry

Wild raspberry

strawberry

1F, 2M

10F, 4M

0F, 1M

Elgin Raspberry

Raspberry

Raspberry

2F, 0M

1F,0M

1F, 0M

0F, 1M

Norfolk Wild raspberry

Blueberry

Blueberry

Blueberry

0F,2M

0F, 0M

1F, 0M

Niagara Blueberry

Strawberry

Strawberry

1F, 1M

5F,6M

5F, 2M

Niagara Strawberry

Wild Mulberry

Raspberry

4F, 0M

2F, 0M

0F, 0M

Niagara Raspberry

Apricots

Raspberry

0

0

0

Niagara Apricots

Peach

Peach

0

0

2F, 1M

0F, 1M

0

1F, 0M

Niagara Peach

Peach

Peach

Peach

Peach

Peach

0

0

0

oF, 1M

Niagara Raspberry

Peach

Peach

Apricots

1F, 0M

4F, 1M

4F, 1M

0F, 3M

12F, 1M

Niagara Tart cherry

Sweet cherry

Sweet cherry

Sugar plums

Apricots

0F, 2M

5F, 0M

2F, 0M

0

Durham Blueberry

Blueberry

Blueberry

Blueberry

2F, 2M

1F, 2M

0

1F, 3M

Northumberland Wild raspberry

Raspberry

Raspberry

Raspberry

0

1F, 0M

0

0

Ottawa/Carleton Wild host

Strawberry

Strawberry

Strawberry

0 comments on “SWD Update July 27, 2018

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