Archive for the ‘Mummyberry’ Category

Symptoms of Mummy berry disease and others

Monday, May 20th, 2013

I think the mummy berry infection season is over for this year.  Cups in most areas would have dried up over the last few days, so there won’t be any spores to infect the plants.   I don’t think this current wet weather will be causing any infection periods for the mummy berry fungus.

You may start seeing symptoms of Mummy berry disease in your field  now and over the next week.    It is too late to spray fungicide at this time. Any symptoms you find are from infections that occurred at least 9 to 10 days ago.  The spores produced on the dead leaves and flowers will NOT cause new killing infections. These spores will infect healthy flowers and produce mummy berries. The number of mummy berries produced are typically too low to be concerned about trying to control this stage of the disease.

MUMMY BERRY SYMPTOMS

Symptoms of mummy berry disease are shown in the pictures below. This fungus does attack and kill both flowers and leaves.  Flowers are typically killed before they open.  The petiole (base of leaf) of leaves give a characteristic shepherd’s crook shape.  Powdery gray spores can be seen at the base of the leaves or flowers where they attach to the plant. Unless it is a very susceptible clone, you will only see isolated leaves and flowers with the disease.

Picture of mummy berry disease symptoms on leaves and flowers. gray powder is found at the base of dead flowers and leaves

FROST

You may also see frost damage in some clones. Frost tends to affect most of the flowers on a stem. You may also see just the green growing tip of the leaf dying off. Please see pictures below.

 

Picture of frost damage of blossoms, all flowers on a stem tend to be affected. On leaves, the youngest leaf in the center of the cluster have been killed. 

Botrytis blossom blight

If you have had Botrytis blossom blight in your field previously, this is the time of year to scout for it in early blooming clones.  The symptoms are dead, open, flowers with black hairs sticking out of them (see picture below). You will probably need a magnifying glass or hand lens to see the hairs.   If you do have it in your field, this wet weather over this week may cause infection by this fungus.  It is only worthwhile to apply fungicides for Botrytis blossom blight if you are sure you have had this disease in the past and it has affected your yield.

Picture of Botrytis blossom blight showing black hairs coming off of dead flowers or leaves

 

If you have any questions, please email Seanna Annis at sannis@maine.edu or call 207-581-2621.

Mummy Berry Forecast for Thursday May 16th

Thursday, May 16th, 2013

Knox, Lincoln, Waldo and Southern Hancock counties

Mummy berry cups dried up early this week so it is unlikely there were any infections in your area in this last rain.

Northern Hancock and Washington counties

Most cups are finished from our monitored field sites.  Only one mature cup was still reported at Long Pond area near Deblois  today.  All the rest of the monitored sites, around Deblois, Wesley, Cherryfield and along the coast to East Machias do not have any remaining cups.  I expect the cups to be finished completely within a couple of days.

If you have a late field, there is a chance you may still have cups in your field and may have had an infection period last night.

For those of you who might have had an infection period last night, if you have applied fungicide on or after Monday May 6th, your plants were protected during this last infection period last night.  I would only recommend fungicides if you have a late field that is not yet elongating flower buds and has a history of severe mummy berry disease.  If you have not applied fungicides, you have until Sunday  May 19th  in the evening  to apply fungicides to kill any infection.    You will want to consider if you have bees in your field in your decision to apply fungicides.

If you have any questions please contact Seanna Annis via email sannis@maine.edu or by phone 207-581-2621.

Weather station location Start of infection period on Wednesday May 15th
West Rockport Cups done
Appleton Cups done
Sedgewick Cups done
Ellsworth Cups done
Silsby Plains 8:40pm
Deblois 9:20pm
Montegail  9pm
Rocky Pond 9:20pm
Jonesboro No cups Monday
East Machias No cups Monday
Meddybemps 10:20pm

Mummy berry forecast and Frost – Tuesday May 14th

Tuesday, May 14th, 2013

Meddybemps area only

Our Meddybemps weather station  indicated there was an infection period in that field last night starting at 7:20pm and continuing to  8:40am.    For this infection period in the Meddybemps area if you have applied fungicide on or after Sunday May 4th, your plants were protected during the infection period overnight.  If you have not applied fungicides, you have until Thursday May 16th  in the evening  to apply fungicides to kill any infection.    You will want to consider if you have bees in your field in your decision to apply fungicides.

Other areas

No infection periods were indicated in our other monitored fields.

The temperature dipped below 30F at our Silsby Plain field, but no where else.  In Silsby Plain, it was below 30F from midnight to 1:20pm. This may cause frost damage to fully open flowers.

Any questions, please contact Seanna Annis at 581-2621 or send me an email sannis@maine.edu.

Mummy Berry Forecast for Monday May 13th

Monday, May 13th, 2013

Knox and Lincoln Counties

The mummy berry cups were finishing up last week and unless you had a very late field, you probably did not have any infection over this past weekend.

Waldo and Southern Hancock counties

The mummy berry cups were finishing up a the end of last week, but there may have been infection periods over this weekend in your areas.  If you have a mummy berry plot, I would like to know if it is finished or not. 

Northern Hancock and Washington counties

There were infection periods in fields in these areas over the weekend.

Mature mummy berry cups were reported across this area on Friday, but no new cups or pinheads were observed.   I expect these cups will be finished by early this week. 
If you have a mummy berry plot, I would like to know whether the cups are finished.  

 

Frost warning

Temperatures dipped drastically on Sunday night and are expected to be in the 30sF for the next two nights. From Lee Beers graduate work, fully open flowers can be damaged at temperatures below 30F.

For these last infection periods starting on Saturday, if you have applied fungicide on or after Thursday May 2nd, your plants were protected during the infection period this past weekend.  If you have not applied fungicides, you have until Wednesday May 15th  in the evening (depending upon the field) to apply fungicides to kill any infection.    You will want to consider if you have bees in your field in your decision to apply fungicides.

Any questions, please contact Seanna Annis at 581-2621 or send me an email sannis@maine.edu.

Weather station location Start of infection period on Saturday May 11th Start of infection period on Sunday May 12th
West Rockport cups probably have gone by
Appleton cups probably have gone by
Sedgewick 4:20pm 7:40pm
Ellsworth 4:40pm continued to Monday
Silsby Plains 3:40pm continued through Monday
Deblois 5pm 8:40pm
Montegail  5:20pm 5pm
Rocky Pond 6:20pm 8:40pm
Jonesboro 4:15pm and probably continued through Monday
East Machias wetness continuous from Friday night
Meddybemps 5:20pm 12:40pm

Mummy Berry Forecast for Saturday May 11th – another infection period

Saturday, May 11th, 2013

 As you may have guessed, there was another infection period in all of our monitored sites overnight (from Friday May 10th) and there will be another one today and into tomorrow (Sunday May 12th) morning.  

The good news for more southern fields in Knox and Lincoln counties is that  I suspect the mummy berry cups are finished or just about.  Unfortunately, I do not have a grower monitoring a mummy berry plot that far south so this is my best estimate  considering the reports from other areas.  If you have a late field around West Rockport area you may have experienced an infection period.

The rest of the monitored fields still have reports of mature cups so they do have the fungus around and are likely to have had another infection period overnight.   I expect we are near the end of the season and the warm dry weather next week will finish off the cups.

Remember your plants are susceptible even if the leaves are unfurled and flowers are starting to appear.    

For this last infection period, if you have applied fungicide on or after Wednesday May 1st, your plants were protected during the infection period last night.  If you have not applied fungicides, you have until Monday May 13th  in the evening (depending upon the field) to apply fungicides to kill any infection.

I would like to hear from anyone with a mummy berry plot, to know if their mummies are still producing cups or finished. Please call 207-581-2621 or send me an email at sannis@maine.edu.

If you have any questions, please contact Seanna Annis at sannis@maine.edu, or 581-2621.

Weather station location Start of infection period on Friday May 10th
West Rockport 7:40pm only in late fields
Appleton 11pm
Sedgewick 8:40pm
Ellsworth 7pm
Silsby Plains 6:20pm
Deblois 10pm
Montegail  11:40pm
Rocky Pond midnight
Jonesboro 8:15pm
East Machias 8:40pm
Meddybemps 7pm

Mummy Berry Forecast for May 10th

Friday, May 10th, 2013

There has been another infection period overnight in all monitored fields.  The infection period started around 4pm  to 9:30pm depending upon the location. 

Remember your plants are susceptible even if the leaves are unfurled and flowers are starting to appear.   Mature mummy berry cups are dying off but there are probably some mature cups still present particularly Downeast.    I expect we are at the end of the season, but the rain predicted to occur through out Maine on Saturday will produce another infection period. 

I would like to hear from anyone with a mummy berry plot, to know if their mummies are still producing cups or finished.  Please call 207-581-2621 or send me an email at sannis@maine.edu.

For this last infection period, if you have applied fungicide on or after Tuesday April 30th, your plants were protected during the infection period last night.  If you have not applied fungicides, you have until Sunday May 12th  at 4 to 9pm (depending upon the field) to apply fungicides to kill any infection.

Any questions, please contact Seanna Annis at sannis@maine.edu, or 581-2621.

Weather station location Start of infection period on Thursday May 9th
West Rockport 5:20pm
Appleton 4pm
Sedgewick 6:40pm
Ellsworth 5:20pm
Silsby Plains 9:40pm
Deblois 5:40pm
Montegail  6pm
Rocky Pond 5:40pm
Jonesboro 5pm
East Machias 8:40pm
Meddybemps 8pm

Mummy berry forecast May 9th

Thursday, May 9th, 2013

There has been an infection period overnight in all monitored fields.  The infection period started around 6 to 9pm depending upon the location.   Mature mummy berry cups are still present in most fields but are starting to die off.  

Rain is predicted through the weekend and I expect more infection periods with this rain.  Plants are starting to come into bloom, so you may want to consider if you have bees in your field when you choose which fungicide to apply.  The following is a link to recommendations for fungicides to control mummy berry disease ( 219 Disease recommendations).

 If you have applied fungicide on or after Monday April 29th, your plants were protected during the infection period last night.  If you have not applied fungicides, you have until Saturday May 11th  at 6 to 9pm (depending upon the field) to apply fungicides to kill any infection. This fungicide recommendations are for the last infection period, you should consider if your plants will be protected for future possible infections in the rest of this week.

Any questions, please contact Seanna Annis at sannis@maine.edu, or 581-2621.

Weather station location Start of infection period on Wednesday May 8th
West Rockport 6:20pm
Appleton 8:40pm
Sedgewick 9pm
Ellsworth 7pm
Silsby Plains 8:40pm 
Deblois 8pm
Montegail  7pm
Rocky Pond 7:40pm
Jonesboro 9pm
East Machias 8pm
Meddybemps 6:20pm

Mummy berry Forecast for Wednesday May 8th

Wednesday, May 8th, 2013

There has been an infection period due to fog in all monitored fields.   The fog started around 8 to 9pm in most areas and due to the warm temperatures produced an infection period for most areas.

Mature mummy berry cups are still present in most fields but are starting to die off. 

 If you have applied fungicide on or after Sunday April 28th, your plants were protected during the infection period last night.  If you have not applied fungicides, you have until Friday May 10th  at 8pm to apply fungicides to kill any infection. This fungicide recommendations are for the last infection period, you should consider if your plants will be protected for future possible infections in the rest of this week.

Any questions, please contact Seanna Annis at sannis@maine.edu, or 581-2621.

Weather station location Start of infection period on Tuesday May 8th
West Rockport 7pm
Appleton 8pm
Sedgewick 7pm
Ellsworth 8pm
Silsby Plains 10pm
Deblois 9pm
Montegail  9:40pm
Rocky Pond 8:40pm
Jonesboro 9:30pm
East Machias 9pm
Meddybemps 10pm

Mummy berry forecast for Tuesday May 7th

Tuesday, May 7th, 2013

Waldo, Lincoln, Knox, Hancock and Washington counties

There was enough fog to cause an infection period at all of our monitored weather stations last night.  If you are farther inland you may have missed it, but as far inland as Hwy 9 Downeast and Appleton (about 12 miles from the coast),  we have had an infection period. 

Mature cups have still been found in any field that previously reported mature cups.  Mature cups have been reported in Liberty, Appleton, Ellsworth, through out the barrens, and Jonesboro.   With the fog predicted for tonight and the wet weather for the rest of the week there is a good chance of more infection periods in the next week. 

If you have applied fungicide on or after Saturday  April 27th, your plants were protected during the infection period last night.  If you have not applied fungicides, you have until Thursday May 9th  at 8pm to apply fungicides to kill any infection. This fungicide recommendations are for the last infection period, you should consider if your plants will be protected for future possible infections in the rest of this week.

Any questions, please contact Seanna Annis at sannis@maine.edu, or 581-2621.

Weather station location Start of infection period on Monday May 6th
West Rockport 7:20pm 
Appleton 8pm
Sedgewick 8pm
Ellsworth 8pm
Silsby Plains 9:40pm
Deblois 8:20pm
Montegail  8pm
Rocky Pond 10pm
Jonesboro 9pm
East Machias 8pm
Meddybemps 9pm

Mummy berry forecast for May 6th 2013

Monday, May 6th, 2013

Knox and Waldo counties

There was an infection period recorded at our weather station in West Rockport (Knox county) from Sunday May 5th at 9pm to Monday May 6th at 8:40am.   The recording at our Appleton weather station showed temperatures that were too cool for an infection period to have occurred.

If you have a field that did not have frost last night and is close to the ocean with about 10 hours of fog last night (Sunday) than you have a good chance of an infection period. 

If you applied fungicide on or after Friday April 26th, your plants would have been protected through this infection period.  If your plants were not protected, you can apply fungicides up until Wednesday  May 8th at 9pm and still have any  infection killed off. 

All other areas

No infection periods were seen at any other weather station. 

 

Please apply any fungicides following the label and this year’s guidelines in the Factsheet #219-Disease Control Guide for Wild Blueberries.

Any questions please email Seanna Annis at sannis@maine.edu