Decreased availability of boron results in appearance of necrotic spots.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Terms**: Start by defining what necrosis is. Necrosis refers to the death of tissue, particularly in plants, which can manifest as necrotic spots on leaves.

2. **Identifying Nutrient Deficiencies**: Recognize that necrosis in plants is primarily associated with deficiencies in specific nutrients. The key nutrients that lead to necrotic spots include Calcium, Magnesium, Copper, and Potassium.

3. **Analyzing the Statement**: The statement in question claims that decreased availability of Boron results in necrotic spots.

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