Brown Potato Chips (IMAGE) Texas A&M AgriLife Communications Caption Chips on the left are from potatoes infected with the zebra chip disease, which alters the sugar levels and causes the sugar to carmelize and give a burned appearance, according to Dr. Don Henne, Texas AgriLife Research assistant research scientist. Credit (Texas AgriLife Research photo by Kay Ledbetter) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.