Researchers from around the globe will converge on San Antonio Nov. 6-9 to discuss and hear the latest findings on zebra chip, a microbial disease of potatoes.

More than 50 presentations are scheduled, according to a news release.

The annual reporting session is part of a multi-state, multi-disciplinary specialty crop research initiative grant-funded research project.

The effort is headed by Texas AgriLife plant pathologist Charlie Rush, who's based in Amarillo.

Zebra chip, caused by Liberibacter solanacearum, is spread by the potato psyllid.

The bacterium prevents sugars in the tuber from turning to starch.

When the potatoes are exposed to high heat, such as during frying for chips, the sugar carmelizes, forming dark stripes.

The defect is harmless to humans but renders the chips unmarketable.

For more information on zebra chip or the conference, visit