Boron Deficiency of Solanaceous Crops
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Boron deficiency in potatoes results in necrosis (dieback) of the tuber tissue. Use boron-containing fertilizers to correct deficiencies. Be cautious to not over-fertilize with boron as it is a micronutrient, and much lower levels are necessary to correct deficiencies than with macronutrients, such as nitrogen, potassium, and phosphorus.
Boron deficiency in potato.
(Photo: UK Vegetable IPM Team)