Lack of potato elements Zinc deficiency Sulfur deficiency Potassium deficiency Phosphorus deficiency Nitrogen deficiency Molybdenum deficiency Manganese deficiency magnesium deficiency Iron deficiency Calcium deficiency Boron deficiency Potato diseases Potato fritters Phytopterosis of potatoes Potato rhizochtoniosis Fusarium dry rot of potatoes Potato Alternaria Potato pests Wire worms Colorado beetle Potato stem nematode Bostana or Makhra