From observations made on Monday May 13, 2019 some blueberry varieties have advanced past the F2 bud stage, and viable apothecia cups are still present. There is potential for an infection period during the rain forecast for Tuesday May 14, 2019 and Wednesday May 15, 2019. If you applied protective sprays for the infection period between Friday May 10 and Saturday May 11, you should still have protection during this next infection period. If you have not applied protection up to this point you can still achieve control by using a product with back-action capability (Topas, Mission, etc) within 72 hours of the start of the infection period.
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| Bud stage from May 13, 2019 |
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| Apothecia cups from May 13, 2019 |
As a reminder these recommendation are based off of observations made at a site in the Annapolis Valley, and may not be applicable to your specific field. The decision to spray should be based off scouting and observation made in your own field. Infection periods only occur when blueberries are at a susceptible bud stage, apothecia cups are present, and weather conditions are suitable. For more information on highbush blueberries, mummy berry disease, and fungicides please refer to Management of Mummy Berry Disease in Highbush Blueberry