By Doris19
Lancashire,
United Kingdom 
We have planted earlies, 2nd earlies and maincrop potatoes and yesterday saw that 3 of the maincrop plants wern't doing as well as the others. They were smaller and, although the leaves were still green, they were wilted. Each stem was rotted just under soil level. The roots looked alright with small healthy looking potatoes forming. Any ideas what this might be?
5 Jun, 2011
The only thing I could think it is, is stem rot sometimes known as Sclerotium rot. It is a fungus but with this you usually get white powdery cotton like fibres under the soil and the plants goes yellow. The only other thing could be critter like slugs eating the stems?
8 Jun, 2011