Early frost and temperature difference (day/night)
Sunscald and high temperature (heat)
High pH (neutral to alkaline) and boron (B) deficiency
Heavy rainfall and wind
Varietal problem and physiological disorder
Water deficit and drought
Sunscald and Chilling / Low temperature (cold)
High temperature (heat) and deficit water
High pH (neutral to alkaline) and low fertilization
Brown heart
Hollow heart
Elephant or Alligator hide
Jelly end rot
Insufficient oxygen / Enlarged lenticels
Second growth / Secondary tuber
Pressure injury or pressure bruise
Tuber greening
Pointed stem end or Pointed bud end
Rapid vine death