Wild Blueberry Blight Line Info - May 13

Friday, May 13, 2011

Special Notes:
• Grower co-operators in various areas of the province monitor flower bud development, apothecial cup development, as well as keep track of temperature and flower bud wetness.
• The decision to control Monilinia Blight is dependent on past history of the disease in a particular field.
• Flower buds become susceptible to Monilinia Blight at the F2 stage (bud scales separating).
• Once fields reach 40-50% F2 and beyond, a fungicide is required within 72 hours of the start of an infection period.
• This application will provide 7-10 days protection.
• Refer to Monilinia factsheets for pictures of the F2 stage and temperature and wetness requirements for an infection period.

Location & Bud Stage

Sable River (Shelburne County) - 80% F2
Rawdon (Hants County) - +40-50% F2
Glenmore (Halifax County) - 78% F2
Dean (Musq) - +40-50% F2
Cooks Brook (Halifax County) - 89% F2
Kemptown (Colchester County) - 45% F2
Earltown (Colchester County) - 74% F2
Swallow Road (Cumberland County) - 88% F2
Tatamagouche Mtn (Colchester County) - 76% F2
Spidell Hill (Colchester County) - 49% F2
Monastery (Antigonish County) - +40-50% F2
Highland Village (Colchester County) - +40-50% F2
Londonderry (Colchester County) - +40-50% F2
Farmington – (Cumberland County) – 18% F2
Westchester – (Cumberland County)– +40-50% F2
Windham Hill – (Cumberland County)– +40-50% F2
Mapleton – (Cumberland County)– +40-50% F2
Woods Mt –(Cumberland County)– 45% F2
Diligent River – (Cumberland County)– +40-50% F2
Parrsboro – (Cumberland County)– 37% F2

There are mature apothecial cups in mainland Nova Scotia. There are many fields in the province that are nearing or are above the critical 40 to 50% F2 stage. Growers should be monitoring their fields for bud development. Since the last update on Tuseday May 10th it has been almost continuously wet throughout the province, making for a very long infection period for fields at or above the 40-50% F2 stage. Fields are very soft making spraying very difficult. Early fields that were sprayed 7 or more days ago will require a second fungicide application. Funginex moves into the plant very quickly - within 1 hour. Topas and Mission seem to have similar activity. Environment Canada's 5 day forecast is not particularly good, with cloud, showers and periods of rain in the forecast.

Take Note:
Next forecast will be on the afternoon of Tuesday, May the 17th.
Any questions, please contact Rick Delbridge at 902-678-5329.