Fact Sheet No. 217, UMaine Extension No. 2255
Original text prepared by Rick Delbridge, Nova Scotia Department of Agriculture and Marketing, Kentville, Nova Scotia, and Dr. Paul Hildebrand, Agriculture Canada, Kentville, Nova Scotia, and modified by David Yarborough, Extension Blueberry Specialist, The University of Maine, Orono, ME 04469. Original April 1992. Revised February 1998.
There are several factors that will help blueberry growers make better management decisions to control Monilinia blight:
These findings mean that once blueberry buds reach a susceptible stage, you can wait until after an infection period has occurred (as long as the wet period is not over 72 hours long!) to apply a fungicide. To determine when you need to apply the first spray, ask yourself the following questions:
|Severity Rating of Monilinia Infection Periods|
|Mean Temperature (°F) during Infection Period|
IMPORTANT NOTE: If a frost has not occurred, risk is greatly reduced. Spray only when the rating is HIGH.
The second application should be applied at least seven days later when there is a MODERATE to HIGH severity rating after a frost or a HIGH rating when no frost occurs.
Refer to Wild Blueberry Fact Sheets 211, Blueberry Diseases 1, and 219, Disease Control Guide for Wild Blueberries, for details on identification of blight and disease control treatments.
Information in this publication is provided purely for educational purposes. No responsibility is assumed for any problems associated with the use of products or services mentioned. No endorsement of products or companies is intended, nor is criticism of unnamed products or companies implied.
© 1992, 1998
Published and distributed in furtherance of Cooperative Extension work, Acts of Congress of May 8 and June 30, 1914, by the University of Maine and the U.S. Department of Agriculture cooperating. Cooperative Extension and other agencies of the USDA provide equal opportunities in programs and employment. Call 800.287.0274 or TDD 800.287.8957 (in Maine), or 207.581.3188, for information on publications and program offerings from University of Maine Cooperative Extension, or visit extension.umaine.edu.
The University of Maine does not discriminate on the grounds of race, color, religion, sex, sexual orientation, including transgender status and gender expression, national origin, citizenship status, age, disability, genetic information or veteran’s status in employment, education, and all other programs and activities. The following person has been designated to handle inquiries regarding non-discrimination policies: Director, Office of Equal Opportunity, 101 North Stevens Hall, 207.581.1226.
Image Description: Print Friendly