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MM and Potatoes

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MM and Potatoes

Post  BrotherNorm on 1/31/2012, 1:01 pm

Greetings all,

I was reading some info from GrowingOrganic.com about growing spuds; specifically this part:

Do you have access to an nice supply of chicken manure? Save it for
another crop. Animal manure, applied alone or as a component of compost,
can lead to the potato disease called “scab”. Ohio State University explains that the manure may carry the bacteria that causes scab.


Since MM can contain composted manure has anyone had the problem described above? Having said that I wonder if the manure they are referring to is straight off the farm and not heated which composting would do to kill any harmful bacteria.

Last edited by BrotherNorm on 1/31/2012, 1:02 pm; edited 1 time in total (Reason for editing : formatting Issues)


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Re: MM and Potatoes

Post  Furbalsmom on 1/31/2012, 2:08 pm

Brother Norm, while I am no expert at growing potatoes, I did grow a couple of varieties in Mel's Mix.

My Mel;s Mix had composted steer and chicken manure.

I did not have any problem with scab.

The worst issue I had was the flakes of vermiculite stuck onto the outer surface of the potatoes and it was a pain to remove before cooking.


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Re: MM and Potatoes

Post  llama momma on 1/31/2012, 2:11 pm

My only experience was growing one square of potatoes last year with lots of llama manure in the compost. Here is a picture of one tater. The rest looked the same. I don't see any scab.

llama momma

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Re: MM and Potatoes

Post  plantoid on 1/31/2012, 2:47 pm

The only reason I know for scab is poor levels of nutrients , not enough water and too much lime
Too much mushroom compost readily comes to mind .


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Re: MM and Potatoes

Post  littlejo on 1/31/2012, 3:07 pm

I used chicken manure in my compost, and if I remember right, I added composted chicken manure as 1 of my 5 when I first made my beds. No scab. I think this yr I will plant my seed potatoes in MM, but as I add to the box as potatoes grow, I will use something (leaves, straw, just compost) because I did have the vermiculite sticking in the skins of last yrs. potatoes.



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Re: MM and Potatoes

Post  Squat_Johnson on 1/31/2012, 3:38 pm

There is nothing wrong with using _some_ composted manure. Too much will alter the PH, and that is what encourages the scab bacteria. I think too much lime would probably do the same thing.

I have medium vermiculite. I haven't noticed it sticking to the potato skins.


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Re: MM and Potatoes

Post  jpatti on 1/31/2012, 4:11 pm

The 5 years we had chickens, we threw their bedding straw right into the compost heap when we cleaned out the coop. I grew several varieties of potatoes several times during that period without problem.


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Re: MM and Potatoes

Post  BrotherNorm on 1/31/2012, 7:44 pm

Thanks for the feedback everyone. It was very helpful.


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Re: MM and Potatoes

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