Ask a Question forum: Scabs on potatoes

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Richard45
Feb 12, 2017 8:28 PM CST
I used to grow huge potatoes that were clean and scab free,now for the last 4 or five years they have been terrible very few small and full of scabs.Is there a reason this is happening and what can I do about it?
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Feb 12, 2017 10:49 PM CST
Are you planting in the same spot/soil every year? If so, you may have potato scab.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Sages Million Pollinator Garden Challenge Seed Starter Vegetable Grower
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Weedwhacker
Feb 13, 2017 8:59 PM CST
Welcome to NGA, @Richard45 .

Potatoes prefer a soil pH of less than 6, and need fertilizer that provides more potassium and phosphorus as compared to nitrogen. If you've been using your own seed potatoes you might want to consider buying a fresh supply of "seed." And, as Daisy implied, planting them in an area where you haven't been growing potatoes previously. Smiling
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Feb 13, 2017 9:04 PM CST
That was only implied? Bummer!
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Sages Million Pollinator Garden Challenge Seed Starter Vegetable Grower
Greenhouse Region: United States of America Region: Michigan Enjoys or suffers cold winters Butterflies Birds
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Weedwhacker
Feb 13, 2017 9:07 PM CST
LOL, Daisy. Maybe I'm a little too literal? Rolling my eyes.
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer /
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Feb 13, 2017 10:46 PM CST
Maybe I'm a little too subtle. Smiling
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org

Richard45
Feb 14, 2017 8:26 PM CST
Every year I change spots.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Sages Million Pollinator Garden Challenge Seed Starter Vegetable Grower
Greenhouse Region: United States of America Region: Michigan Enjoys or suffers cold winters Butterflies Birds
Image
Weedwhacker
Feb 14, 2017 8:41 PM CST
Richard, it would probably be helpful if we knew what part of the country/world you are gardening in Smiling
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer /
Cubits.org - A Universe of Communities[/I] / Share your recipes: Favorite Recipes A-Z cubit
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Name: Yardenman
Maryland (Zone 7a)
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Yardenman
Feb 15, 2017 4:32 AM CST
Your soil is diseased. Potatoes suffer from the same diseases that tomatoes, peppers, and eggplants do. Rotating the potatoes to where you grew tomatoes etc the past year won't help.

Richard45
Feb 16, 2017 6:54 PM CST
I live in Edmonton Alberta Canada .If my soil is deseased how do I get rid of it?
Minnesota (Zone 3b)
RpR
Feb 17, 2017 12:56 PM CST
Keep them moist and raise drop the ph of your soil. The links I will list says that and more,

One thing I was told and tried a few time was dig a trench a week or so before planting and dust it with Aluminum Sulphate. This acts quickly.

Sulphur needs a greater quantity and takes much longer to do the same.
http://www.albertahomegardenin...
http://vegetablemdonline.ppath...
[Last edited by RpR - Feb 17, 2017 12:58 PM (+)]
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