Scab Resistant Potato

whoose · May 31, 2019

New help with specific varaities of scab resistant potatoes.

Black Krim · February 20, 2020

hey, did you find a list of scab resistant potatoes???

I had a problem in 2019 with scab. Many resistant varieties.

whoose · February 22, 2020

No never did. Someone said white were better than red. Another suggested growing in hay and keeping them off the ground. I will post when I find the article.

Black Krim · February 22, 2020

I do think growing potatoes so they dont touch the soul helps as its a soil born pathogen. It is such a problem that many resistant varieties gave been developed. Need to find my notes.....

Black Krim · February 22, 2020

a general list found on line for scab resistant potatoes....
German butterball
Keuka Gold
Elba
Blue Gold
Nicola
Carola
Salem
Mt Rose
Yukon Gem
Satina
Cheiftan
Red Maria

Did more digging by variety. Some sources contradicted other sources. " resistant" was a vague term and tried to find better details; found better info for some but not others

rose finn fingerling High scab tolerance
puruvian purple high scab tolerance
Cheiftan very high scab tolerance
Satina very high scab tolerance
BalticvRose high tolerance to common scab
keuka gold high scab tolerance
german butter ball good resistance
red gold moderate reststance to common scab
mtn rose resistant to common scab, susepable to powdery scab

purple magesty mod resist scab, md suseptible powdery scab
strawberry paw resistant to scab
Adirondack Red moderate resist to scab , child of Cheiftan
Dark Red Norland mderate resistant scab
all blue moderate resist common scab
caribe moderate resist scab
french fingerling resist to scab
austrian cresent fingerling medium scab resistance
red maria good resistance

Black Krim · February 22, 2020

When I grew a large plot of potatoes, yukon gold and kennebecs, one end of plot scabby and other was not. This had been a horse paddock recently with manure just a few months old, to older.

Apparently pH of soil can help. Lower pH inhibits scab but makes potatoes prone to other serious problems.

Hence the hours of collecting info on scab resistant varieties.

Seems resistence can vary by area planted, as well.

Looks like only by trial will we find what works.

Good luck !!!

Black Krim · February 23, 2020

This might be helpful !

http://vegetablemdonline.ppath.corne...otato_Scab.htm

brownrexx · February 23, 2020

I have high levels of organic material in my soil which scab loves. I have tried to lower the pH with no real success. The only thing that really works for me is growing the tubers in a thick layer of straw. I grew red Norland a couple of years ago in the soil and the entire crop was a scabby mess. Kennebec was less scabby but I'm sticking to straw.

Black Krim · February 23, 2020

Red Norland and Kennebecs dont make the cut for scab resistance as far as a I can see. Are you planting Kennebecs again, or trying a more resistant variety to compare ??Im definitely selecting more resistant varieties.

Straw sounds like a great option. Here straw is VERY VERY expensive.
I have noodled around the idea of using peat to mulch.

Given the increasing choices of resistant varieties, we are not the only growers with scab in the soil.

Black Krim · February 23, 2020

OMG.. . totally forgot about the russet family. Many / most are scab resistant. A few are not.

Sorry I forgot these as russetts dont grow well here, so they are not an option for me and not on my radar.

Black Krim · February 24, 2020

Here are a few more.

Huckleberry Gold mod - hi resistance
Red Cloud high resistance

caribou russett high resistance
Butte russett very high resist
Reddale high resistance
burbank russet very high resistance
Prarie Blush moderate resist

many varieties are suseptable. I called local seed potato supplier to the area to get their list for 2020 season and
ALL are suseptable to scab.

Will be ordering seed potato from Maine Potato Lady again.

brownrexx · February 24, 2020

I buy my seed potatoes locally and I have not seen any of those listed as scab resistant in the list above. I have grown French fingerlings but I can't remember if they got scab or not however they did not produce well so I will not be growing them again. The Kennebec were mostly scab free grown in straw and I also grew a new one last year called Yellow Lehigh which was not only mostly scab free but it has been keeping longer than the Kennebec. I will probably grow those two again this year.

Black Krim · February 24, 2020

In my notes, Lehigh is listed as resistant to scab. A general term I interpret as moderately but could alsi be highly resistant.

Black Krim · March 1, 2020

In an effort to manage scab, i keep looking for info.

"How to Prevent & Control Common Potato Scab
Unlike most of the other vegetables who prefer a pH approaching neutral (7.00) potatoes are best grown in soil with a pH of 5.5 which discourages the Streptomyces Scabies bacteria and therefore the scab. Fertilising with sulphate of ammonia or superphosphate will acidify soils and should be considered for limey soils with a naturally high pH. Do not lime soil prior to planting potatoes unless the soil pH is very low, below 5.00.

Avoid excess use of nitrogen rich fertiliser such as sulphate of ammonia as over-application of nitrogen delays the onset of tuber bulking which prolongs the period that the plant is susceptible to scab.

Increasing the level of organic matter in the soil and thereby retaining moisture in the soil combined with regular watering, ideally each day for the first six weeks after planting will also reduce the severity of symptoms. Keeping the seed tuber skin wet stops the disease taking hold

Crop rotation will also assist in control of potato scab. Growing potatoes in the same place over consecutive years will build up the level of bacteria in the soil. Be aware that radishes, beets, turnips carrots and red clover are all capable of carrying common scab.

There are no chemical controls available to home growers.

Common Potato Scab Resistant Varieties
If common potato scab is persistent problem on your plot then consider growing resistant varieties of potato in addition to the control methods above. Resistant potato varieties include:

Accent
Anna
Anya
Arran Pilot
Avondale
Balmoral
Banba
Camelot
Cara
Carlingford
Carnaval
Challenger
Chaski
Chopin
Claret
Cosmos
Courlan
Druid
Electra
Ellie
Galactica
Golden Wonder
Habibi
Inca Bella
Inca Dawn
Jester
King Edward
La Strada
Lady Christl
Lanorma
Lulu
Malin
Manhattan
Mayan Gold
Mayan Queen
Mayan Twilight
Melody
Mimi
Morene
Nadine
Orchestra
Paru
Pentland Crown
Picasso
Piccolo Star
Pink Gypsy
Pizazz
Russet Burbank
Saturna
Savanna
Avoid planting varieties very susceptible to common scab
like:
Ambassador
Blue Danube
Duke Of York
Emma
Foremost
Horizon
Lady Claire
Maris Piper
Maxine
Mayan Star
Mistay
Mustang
Panther
Red Duke Of York
Rudolph
Setanta
Shelford
Smith’s Comet
Spunta
Tresdale
Ulster Chieftain
Up-to-date
Zohar
"

Black Krim · March 1, 2020

the above is from.....

https://www.allotment-garden.org/veg...o-scab-common/

May 31, 2019	#1
whoose Tomatovillian™ Join Date: Mar 2015 Location: Bozeman, Montana Zone 6b Posts: 333	Scab Resistant Potato New help with specific varaities of scab resistant potatoes.

February 22, 2020	#5
Black Krim Tomatovillian™ Join Date: Dec 2016 Location: New England Posts: 661	a general list found on line for scab resistant potatoes.... German butterball Keuka Gold Elba Blue Gold Nicola Carola Salem Mt Rose Yukon Gem Satina Cheiftan Red Maria Did more digging by variety. Some sources contradicted other sources. " resistant" was a vague term and tried to find better details; found better info for some but not others rose finn fingerling High scab tolerance puruvian purple high scab tolerance Cheiftan very high scab tolerance Satina very high scab tolerance BalticvRose high tolerance to common scab keuka gold high scab tolerance german butter ball good resistance red gold moderate reststance to common scab mtn rose resistant to common scab, susepable to powdery scab purple magesty mod resist scab, md suseptible powdery scab strawberry paw resistant to scab Adirondack Red moderate resist to scab , child of Cheiftan Dark Red Norland mderate resistant scab all blue moderate resist common scab caribe moderate resist scab french fingerling resist to scab austrian cresent fingerling medium scab resistance red maria good resistance Last edited by Black Krim; February 22, 2020 at 08:45 PM.

February 22, 2020	#6
Black Krim Tomatovillian™ Join Date: Dec 2016 Location: New England Posts: 661	When I grew a large plot of potatoes, yukon gold and kennebecs, one end of plot scabby and other was not. This had been a horse paddock recently with manure just a few months old, to older. Apparently pH of soil can help. Lower pH inhibits scab but makes potatoes prone to other serious problems. Hence the hours of collecting info on scab resistant varieties. Seems resistence can vary by area planted, as well. Looks like only by trial will we find what works. Good luck !!! Last edited by Black Krim; February 22, 2020 at 08:41 PM.

February 23, 2020	#9
Black Krim Tomatovillian™ Join Date: Dec 2016 Location: New England Posts: 661	Red Norland and Kennebecs dont make the cut for scab resistance as far as a I can see. Are you planting Kennebecs again, or trying a more resistant variety to compare ??Im definitely selecting more resistant varieties. Straw sounds like a great option. Here straw is VERY VERY expensive. I have noodled around the idea of using peat to mulch. Given the increasing choices of resistant varieties, we are not the only growers with scab in the soil. Last edited by Black Krim; February 23, 2020 at 10:50 AM.

February 24, 2020	#12
brownrexx Tomatovillian™ Join Date: Feb 2016 Location: Southeastern PA Posts: 1,420	I buy my seed potatoes locally and I have not seen any of those listed as scab resistant in the list above. I have grown French fingerlings but I can't remember if they got scab or not however they did not produce well so I will not be growing them again. The Kennebec were mostly scab free grown in straw and I also grew a new one last year called Yellow Lehigh which was not only mostly scab free but it has been keeping longer than the Kennebec. I will probably grow those two again this year. Last edited by brownrexx; February 24, 2020 at 09:30 PM.

February 20, 2020	#2
Black Krim Tomatovillian™ Join Date: Dec 2016 Location: New England Posts: 661	hey, did you find a list of scab resistant potatoes??? I had a problem in 2019 with scab. Many resistant varieties.

March 1, 2020	#14
Black Krim Tomatovillian™ Join Date: Dec 2016 Location: New England Posts: 661	In an effort to manage scab, i keep looking for info. "How to Prevent & Control Common Potato Scab Unlike most of the other vegetables who prefer a pH approaching neutral (7.00) potatoes are best grown in soil with a pH of 5.5 which discourages the Streptomyces Scabies bacteria and therefore the scab. Fertilising with sulphate of ammonia or superphosphate will acidify soils and should be considered for limey soils with a naturally high pH. Do not lime soil prior to planting potatoes unless the soil pH is very low, below 5.00. Avoid excess use of nitrogen rich fertiliser such as sulphate of ammonia as over-application of nitrogen delays the onset of tuber bulking which prolongs the period that the plant is susceptible to scab. Increasing the level of organic matter in the soil and thereby retaining moisture in the soil combined with regular watering, ideally each day for the first six weeks after planting will also reduce the severity of symptoms. Keeping the seed tuber skin wet stops the disease taking hold Crop rotation will also assist in control of potato scab. Growing potatoes in the same place over consecutive years will build up the level of bacteria in the soil. Be aware that radishes, beets, turnips carrots and red clover are all capable of carrying common scab. There are no chemical controls available to home growers. Common Potato Scab Resistant Varieties If common potato scab is persistent problem on your plot then consider growing resistant varieties of potato in addition to the control methods above. Resistant potato varieties include: Accent Anna Anya Arran Pilot Avondale Balmoral Banba Camelot Cara Carlingford Carnaval Challenger Chaski Chopin Claret Cosmos Courlan Druid Electra Ellie Galactica Golden Wonder Habibi Inca Bella Inca Dawn Jester King Edward La Strada Lady Christl Lanorma Lulu Malin Manhattan Mayan Gold Mayan Queen Mayan Twilight Melody Mimi Morene Nadine Orchestra Paru Pentland Crown Picasso Piccolo Star Pink Gypsy Pizazz Russet Burbank Saturna Savanna Avoid planting varieties very susceptible to common scab like: Ambassador Blue Danube Duke Of York Emma Foremost Horizon Lady Claire Maris Piper Maxine Mayan Star Mistay Mustang Panther Red Duke Of York Rudolph Setanta Shelford Smith’s Comet Spunta Tresdale Ulster Chieftain Up-to-date Zohar "

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