Strange growths on my potatoes' stems

We have been harvesting potatoes (Sarpo Mira) and we saw a few strange growths on the stems.   Have you any idea what they are?  They are not the green tomato like "fruit" -  there were some of those, this thing is very different.
Could it be some sort of gall caused by an insect?



  • DovefromaboveDovefromabove Central Norfolk UKPosts: 53,791
    Sometimes potatoes grow on the stems above ground as well as below.  Sarpo mira is a red potato ... I think this is a potato with enlarged lenticels. It has developed a vivid colour because it has had more light.  
    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh

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