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 |
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