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Scabby potatoes?

A neighbor just finished harvesting his red potatoes and brought me a basket of them. He's concerned because they have what looks like scabs on them. Says he's never had this problem before and is wondering what caused it?
Here's what they look like.

Now I'm almost afraid to dig mine...is it the weather?
 
Potato scab is a very common problem with potatoes grown in a soil with a too high pH. There are many pathogens that cause potato scab and all are kept from infecting potatoes when the soil pH the potatoes are grown in is less than about 5.7.
http://vegetablemdonline.ppath...eets/Potato_Scab.htm
 

The sign of a good gardener is not a green thumb, it is brown knees.

West central Michigan along the lakeshore.

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It is very common in Utah. Our soils tend to be on the alkaline side. Not a big deal, just peel them.
 

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Gardening at 5000 ft. elevation in Northern Utah  Zone 5

Have a great gardening day!

http://donce.lofthouse.com/jam...lanting/planting.htm

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I put down several pounds of sulfur this spring where the potatoes went. I have the worst scab ever this season! I am going to stop saving my own potato seed and buy it all fresh next season. I am also putting down the sulfur as soon as I can after frost this season, where the potatoes will go next year. I am going to sulfur like crazy, get scab resistant varieties and hope that works!

BTW how much sulfur for an area 750-1000 sq feet and a ph of about 6.5 (average for the whole garden)?
 

 

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Small market and CSA grower. 1/2 acre. Doing too much by myself but trying. http://www.localharvest.org/member/M33044

Central Minnesota Zone 4

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Geez Kalico - that's NOTHING. In fact, it's a darn good-looking potatoe. I've seen more scabs on supermarket potatoes.

It's just a cosmetic thing. Enjoy them!
 

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"My body is a temple - unfortunately, it's a fixer-upper."

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"And no, I'm NOT being snarky."

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Zone 7a, Culpeper, Virginia

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About half of my potatoes got harvested today and they don't have the scab issue that the neighbor's had. He's never had it before so he's concerned. I'll convey your thoughts to him. He's planning to build himself a new patch next spring.
Our harvest was much smaller than I expected considering how much water I gave them. I thought they loved hot weather. Each plant had a couple of largish spuds and half a dozen small ones.
One bowl full of the smallest became potato salad within an hour of harvest!
 
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Minnie, your local office of your University of Minnesota Cooperative Extension Service should be able to tell you that quickly.
http://www.extension.umn.edu/offices/
 

The sign of a good gardener is not a green thumb, it is brown knees.

West central Michigan along the lakeshore.

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