3rd Blight Update and Seasonal Outlook for Nova Scotia- April 29, 2022

Friday, April 29, 2022

 3rd Blight Update and Seasonal Outlook for Nova Scotia- April 29, 2022


This is our third Monilinia update for 2022.

Before the weekend, I like to share another update on the percentage of fruit buds at F2. Please see the table below. Have a great weekend!

After we pass this wet period, we are expecting most of the fields in central NS will get into 40% F2 and infection period when the next wet period arrives. Fields in Pictou and Antigonish counties are a little bit behind (maybe 1-1.5 weeks), however, if you are looking at the % F2 map and see your area is in “yellow”, you are getting close to your first Monilinia treatment.

Wild Blueberry Floral Bud F2 Stage

Please see the below summary table of the percentage of wild blueberry floral bud at the F2 stage. You can also click on this map to check those numbers. Detailed information is also available under the Wild Blueberry Blog- GDD& Phenology Tracker.

Table 1. Percentage of Wild Blueberry Floral Bud F2 stage

light green (0-20% F2)dark green (20-30% F2)yellow (30-40% F2) and red (40-100% F2)


Wild blueberry production regions, NS

The average percentage of floral buds at F2



Cape Breton




Cumberland County



April 28- 25%

Mapleton (Lynn Mt.)

April 28- 20%

Halfway River

April 26- 40%

Lower Greenville

April 25- 15%

Westchester Station

April 25- 17%


April 28- 35%


April 28- 27%

Diligent River

April 27- 5%



South West Nova Scotia


Queens County

April 23- 42%

Digby County

April 29- 50%

Annapolis County

April 29- 50%



Hants County




Halifax County




Guysborough County




Colchester County


Murray Siding

April 28- 33%


April 28- 10.2%


April 28- 20%

Debert (WBPANS office)

April 28- 30%

Debert (Debert Airport)

April 28- 34%

Debert (near the railway track)

April 28- 30%

Baseline Rd.

April 25- 30%


April 28- 25%



Pictou and Antigonish County


New France

April 27- 5%


April 27- 5%

Mt Thom

April 27- 12%


April 27- 15%

Sunny Brae

April 28- 5%


Sprout fields: I didn’t see plant emergence in sprout fields yet (Cumberland, Colchester and Pictou Counties). Under the wild blueberry GDD model, plant emergence starts at about 270 GDD and we are looking at an average of 150 GDD across central NS. I started to see narrow-leaved goldenrods, sheep sorrel and vetch emerge in sprout fields (observed in Oxford). This would be a good time for growers to take a look at your sprout fields and understand your weed composition and determine what spring herbicides you need before blueberry plants start to emerge.



Narrow-leaved Goldenrods