This is our fourth Monilinia update for 2022.
Wild Blueberry Floral
Bud F2 Stage
In Colchester and Cumberland counties, the majority of
average-development fields are at or above 40% F2, however, those traditional
late fields, such as the eastern part of the province and other fields located
in higher elevations might still be delayed. Please see updates below.
As those areas came to a 40% F2 point, I will stop
updating numbers once they are in “red (40% F2 point)” and move to other late
areas and counties.
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)
*Once the areas and
fields get to 40% F2 or above, I will stop updating numbers as I can focus on
other areas. Once you are at or above 40%, please monitor your local weather
and make a management decision.
|
Wild blueberry production regions, NS |
The average percentage of floral buds at
F2 |
|
|
|
|
Cape Breton |
|
|
|
|
|
Cumberland County |
|
|
Oxford |
May 2-
35% |
|
Mapleton (Lynn Mt.) |
May 2-
30% |
|
Halfway River |
April 26- 40% |
|
Lower Greenville |
April
25- 15% |
|
Westchester Station |
April
25- 17% |
|
Fenwick |
May 2- 40% |
|
Springhill |
May 3- 41.2% |
|
Diligent River |
April
27- 5% |
|
Wentworth |
May 2- 40% |
|
New Canaan |
May
2- 32% |
|
Millvale |
May
3- 34.7% |
|
Windham Hill |
May 3- 13.8% |
|
|
|
|
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 |
May 2- 47% |
|
Belmont |
May 2-
15.3% |
|
Glenholme |
May 2- 28% |
|
Debert (WBPANS office) |
May 2- 44% |
|
Debert (Debert Airport) |
May 2- 45% |
|
Debert (near the railway track) |
May 2- 40% |
|
Baseline Rd. |
May 2- above 40% |
|
Greenfield |
May 2-
31% |
|
Economy |
May 2- 40% |
|
Portapique |
May 2- 40% |
|
Highland Village |
May 2- 27% |
|
Great Village |
May 2- 27% |
|
Tatamagouche Mt. |
May 2- 17% |
|
|
|
|
Pictou and Antigonish County |
|
|
New France |
April 27- 5% |
|
Maryvale |
April 27- 5% |
|
Mt Thom |
April 27- 12% |
|
Kemptown |
April 27- 15% |
|
Sunny Brae |
April 28- 5% |
Monilinia Infection
Periods
Once your
areas and fields are at or above 40% F2, you need to watch the weather forecast
for any potential infection periods. Growers should apply products before an
infection period for those products to work and to protect blueberry plants
from infection.
What
is an infection period?
The infection period combines wetness duration and temperature. The warmer the temperature
and the longer the wetness duration will create a higher chance of infection occurring.
From weather
forecasting information (Environment Canada and Weather Network), it looks like
we will get some rain from May 4-6 depending on the area and if your fields are
at or above 40% F2, you are at risk of Monilinia infection (infection period).
I also took data from those stations we installed in wild blueberry fields and show
in the next 7 days period, and show what are the potential infection period for
fields that reached 40% F2.
Table 2 Weather Forecast for Potential Wetness and Monilinia
Infection Periods
|
Weather
Station and Location |
Potential
Wetness and Monilinia Infection Periods *ONLY
when your field is at or above 40% F2!!! *Predict
period: May 3-9 |
|
Colchester |
|
|
Glenholme
(NSW001) |
May 4-6 |
|
Murray
Siding (NSW002) |
May 4-5 |
|
Upper
Kemptown (NSW022) |
|
|
Kavanaugh
Mills (NSW023) |
May 4-5 |
|
Debert
(NSW036) |
May 4-6 |
|
Belmont
(NSW037) |
May 4-6 |
|
Staples
Brook (NSW038) |
May 4-6 |
|
|
|
|
Cumberland |
|
|
Wyvern
(NSW003) |
May 5 |
|
Oxford
(NSW005) |
May 5 |
|
Halfway
River (NSW039) |
May 4-5 |
|
|
|
|
Pictou |
|
|
Blue
Mountain (NSW017) |
May 5 |
|
Sunny Brae
(NSW018) |
May 5 |
|
New
Gairloch (NSW019) |
May 5 |
|
Keble
(NSW020) |
May 4-5 |
|
Four Mile
Brook (NSW021) |
May 5 |
|
College
Grant (NSW040) |
May 5 |
|
|
|
*Weather source: weather stations in wild blueberry fields (http://www.novascotiawildblueberryblog.com/p/weather.html)