Potassium (K) deficiency
Zinc (Zn) deficiency
Unknown mineral toxicity
Ammonia (NH3) toxicity
Nitrogen (N) toxicity
Boron (B) toxicity
Copper (Cu) toxicity
Manganese (Mg) toxicity
Zinc (Zn) toxicity
Fertilizer contact/Fertilizer burn
Heavy rainfall
Mechanical injury
Chilling / Low temperature (cold)
Cold water
Hail
Gaseous air pollutant (Sulfur dioxide (SO2))
Gaseous air pollutant (Ethylene (C2H4))
Gaseous air pollutant (Ozone (O3))
High temperature and intense sunlight
Wind