This post contains a summary of trap counts for the week of August 20. The traps are shifting from berry crops to later stone fruit and early grape varieties.  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.

Overall, the number of SWD increased  from last week.

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 into stone fruit (peach, nectarine, blue plum) and grape varieties.  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.   Because the impact of SWD on peaches, nectarines, plums and grapes has not been confirmed in Ontario, it is recommended that when choosing pre-harvest insecticides for Oriental fruit moth or Grape berry moth, that products that also have activity against SWD be used if possible.  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 and grapes.

# of Female SWD

# of Male SWD

County Crop Crop Stage

4

1

Essex

 

 

 

Strawberry Harvest

23

8

Raspberry Harvest

14

8

Plum Harvest

12

1

Peach Harvest

0

1

Norfolk

 

 

 

Wild

1

3

Blueberry Ripe

1

2

Blueberry Ripe

1

1

Blueberry Ripe

58

20

Norfolk

 

 

 

Blueberry Harvest

31

12

Blueberry Harvest

96

37

Blueberry Harvest

32

27

Blueberry Harvest

31

13

Niagara

 

 

Blueberry Post Harvest

5

6

Strawberry Harvest

5

1

Strawberry Harvest

1

1

Niagara

 

 

Strawberry Ripe

14

21

Wild Mulberry Turning colour

18

27

Raspberry Post Harvest

15

4

Niagara

 

 

Peach Turning colour

2

1

Peach Turning colour

13

1

Peach Turning colour

20

10

Niagara

 

 

 

Peach Post Harvest

15

15

Peach Post Harvest

22

13

Peach Post Harvest

6

0

Peach Post Harvest

3

2

Niagara Peach Turning colour

29

15

Peach Turning colour

46

38

Peach Turning colour

3

1

Niagara Peach Turning colour

10

5

Peach Turning colour

5

6

Peach Turning colour

31

33

Niagara Plum Pre-Harvest

6

19

  Plum Pre-Harvest

30

31

  Baco Veraison

9

3

Niagara Baco Veraison

21

6

Baco Veraison

24

9

Baco Veraison

1

1

Niagara Pinot Noir Veraison

0

0

Pinot Noir Veraison

1

1

Pinot Noir Veraison

8

5

Niagara Baco Veraison

17

2

Baco Veraison

5

1

Baco Veraison

7

9

Niagara Pinot Noir Veraison

11

14

Pinot Noir Veraison

9

5

Pinot Noir Veraison

3

1

Niagara Chardonnay Veraison

1

3

Chardonnay Veraison

24

11

Chardonnay Veraison

0 comments on “SWD Update August 24

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