Tipburn
This is a physiological condition caused by the plant's inability to obtain sufficient calcium. Calcium is taken up by the plants in soluble form, so the root cause of tipburn is usually insufficient or uneven water uptake, rather than insufficient soil calcium levels. This can be due to rapid plant growth, excessive fertilization rates, or uneven water availability. Resistant varieties are available. Avoid excess fertilization. Provide consistent irrigation via drip irrigation systems. Foliar calcium supplements may have some benefit.