Mummy Berry 2019 #9

Monday, June 3, 2019

From observations made Monday June 3 in the Annapolis Valley apothecia cups have dried up or are no longer producing spores. Because of this there is no longer any threat of primary monilinia infections, and this will be the last mummy berry post of the 2019 season.

Dried apothecia cup from June 3, 2019
Until next season, for more information on highbush blueberries, monilinia, and aprays please refer to Highbush Blueberry Insect and Disease Management Schedule 2019 and Management of Mummy Berry Disease in Highbush Blueberry.

Mummy Berry 2019 #8

Friday, May 31, 2019

As of this week the majority of apothecia cups have dried up or are otherwise unviable. Because of this the risk of primary monilinia infection has significantly diminished. There is a still a chance that infections could occur at this point, but it is very small and after this Saturday (June 1st) I think the risk will have completely dissipated. At this point it may not be necessary or economically viable to spray. I will put out another blog Monday to confirm the end of primary monilinia infection season.


Dried apothecia cups from May 29, 2019 

Mummy Berry 2019 #7

Tuesday, May 21, 2019

Since the last mummy berry post there have been three extended infection periods between Tuesday May 14-Wednesday May 15, Friday May 17-Saturday May 18, and Monday May 20-Tuesday May 21. From observations made Tuesday May 21 the majority of  blueberry varieties are past the F2 stage, and some varieties are beginning to approach pre-bloom. Viable apothecia cups are still present with the rain and lack of sun helping them persist, but decline is beginning to occur. If you applied a protective spray before or after the infection period Friday May 10 you should have had control through the week and most of the weekend. If you did not get on another protective spray before the infection period Monday May 20 you can still use a product with back action (Topas, Mission, etc) to achieve control within 72 hours of the infection period. If you have applied two back to back sprays of a group 3 fungicide (Topas, Mission, etc), then a non-group 3 fungicide such as Diplomat 5SC should be used for resistance management before applying an another group 3 fungicide. An ideal time to apply another spray would be Wednesday afternoon when the rains breaks temporarily as it appears there will be two more extended infection periods between Thursday May 23 and Sunday May 26.

As a reminder these recommendation are based off of observations made in the Annapolis Valley and may not be applicable to your region or field. The decision to spray should be based off of observations and weather conditions from your specific site. For more information on highbush blueberry production, mummy berry, and pesticides refer to Management of Mummy Berry Disease in Highbush Blueberry and Highbush Blueberry Management Schedule 2019.   

Mummy Berry 2019 #6

Monday, May 13, 2019

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. 

Bud stage from May 13, 2019

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