Pontiac Red Potatoes that were brought into our Extension office. They were grown in a small garden. The gentleman planted one row of these potatoes, one end of the row look like the pictures I have attached and the other end the potatoes are perfect. He did have some Potato Beetles on them and has been using Seven Dust to control them. He said the same thing happened last year. Looking through books at the office makes me think, its the larvae from the Beetles or bacterial rot. But, I'm no expert. Could you please guide me in the right direction. Thank you!