Zebra Chip Disease

Zebra Chip DiseaseZebra Chip Disease Foliar Symptoms

Zebra Chip Disease Tuber SymptomsZebra Chip Disease Tuber Symptoms
(Joseph E. Munyaneza, USDA-ARS)

HOSTS

  • Potato
  • Solanaceae Crops

BIOLOGY

Zebra chip disease (Candidatus Liberibacter solanacearum) is a concern throughout the growing season.

  • Infection occurs when diseasecarrying potato psyllids feed on healthy plants.
  • Overwinters in potato psyllids which overwinter in warmer locations.

SYMPTOMS

Above-ground symptoms include yellowing and a pink-reddish discoloration of the foliage, and brown striations on sliced potato tubers (even more pronounced when fried).

GENERAL MANAGEMENT

The disease occurs across Utah but infection levels vary from year to year. The disease tends to be more common in areas that had it in the past.

  • Symptoms on potato can go unnoticed until the potato tubers are sliced. Foliar symptoms are often visible but mistaken for nutrient deficiency.
  • Scout for potato psyllids using yellow sticky cards starting early in the season
  • Inspect undersides of host leaves for the presence of psyllid nymphs.
  • Monitor areas that have had the disease in the past.
  • Control psyllids early in the season.
  • Remove infected plants.
  • Application of insecticides; early in the season to control potato psyllids.