August 3 Berry Bulletin

In this bulletin:

  • Crop Update
  • Spotted wing drosophila
  • Product Update
  • Berry Events

Strawberries: Growers are applying herbicides and miticides where needed to renovated June-bearing fields.  The goal of renovation is to have health plants by mid-August when flowers buds are initiated for next year. Looking at last year’s bulletin we were talking about irrigation at this point in the season- what a different season we are having this year! Harvest is picking up in spring-planted and overwintered fall-planted day-neutrals.

Insects: Tarnished plant bug nymphs (TPB) can be found in day-neutrals. Monitor for TPB, potato leafhopper and two-spotted spider mite regularly in day-neutrals. SWD is active and all growers with ripe fruit should be managing for SWD.   Aphids can be found building up in new fields and on the new growth in renovated fields- insecticides are needed every 3-4 weeks to control aphids and manage viruses through the season.

Day-Neutrals: Disease management has been challenging with the recent rains making it hard to fit a spray in. Controlling anthracnose and botrytis regularly is very important right now. Warm weather with rain will spread anthracnose. Use Switch or Miravis Prime when there’s a high risk- noting the maximum of three applications of fludioxonil-containing products season. Remember to not rely on group 11s alone- there is anthracnose resistance to group 11s in Ontario.  The strawberry disease models may be helpful to time fungicide applications for botrytis and anthracnose control. Some areas of the province have a high risk of anthracnose and botrytis this weekend.

Powdery mildew pressure is also increasing- alternate fungicides from different groups for powdery mildew control.

Raspberries:   Summer-fruiting raspberry harvest is slowing down.  Consider a postharvest insecticide for SWD control if there are fall bearing raspberries or blueberries on your farm.

Blueberries: blueberry harvest continues with a good crop. Growers should be spraying for SWD regularly, and Japanese beetles are a challenge in some areas.

Spotted wing drosophila monitoring: All growers with ripening and ripe berries should be spraying regularly (every 5-7 days, re-applying after ½ inch of rain). SWD numbers will continue to climb for the rest of the summer. Clean, regular harvest is important, cool fruit immediately, and remove unmarketable fruit as pickers move through the field.

Product Update: There have been recent label expansions for berry growers. Check out these blog posts for more information:

Harvanta insecticide label expanded for control of blackheaded fireworm and suppression of cranberry tipworm on cranberries.

Prism Herbicide label expanded for control of labelled weeds on cranberries

Inspire Super fungicide label expanded for control of botrytis and suppression of anthracnose on strawberries

Danitol insecticide label expanded to control weevils and raspberry fruitworm on raspberries, and weevils on bushberries.

Upcoming Events:

Berry Growers of Ontario Twilight Meeting

Mark your calendars for the Twilight meeting on September 13, 2023, hosted by Blueberry Hill Estates, 1195 Front Rd. St. Williams.

  • 4:00 Farm  Tour
  • 6:30- Dinner and BGO Greeting
  • 8:00 Head for Home

Email to register!

Soilless Berry Study Group

When: Thursday, August 24, 2:00-4:00pm

Where: Harry’s Berries, 1230 Windham Road 10, Windham Centre

Cost: Free

Bring your own lawn chairs! Refreshments will be provided. Please contact Victoria Eastman ( or Erica Pate ( to register.

0 comments on “August 3 Berry Bulletin

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: