Fluoride toxicity is a very common problem on houseplants, especially those with long, pointed leaves. |
Symptom: Margins and tips of leaves turn yellow and/or brown. In some plants, elliptical, brown lesions form between the leaf veins. Fluoride toxicity on Aglaonema Photo by Janna Beckerman |
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Fluoride toxicity on dracaena. Photo by Janna Beckerman |
| Causal organism: | N/A |
| Method of dispersal: | N/A |
| Infection point: | N/A |
| Control: | Fluoride toxicity will rarely kill a plant. Damage on plants has been effectively reduced by adding dolomite or calcium hydroxide to the soil to increase the pH, which reduces solubility of fluoride. |
| Labeled fungicides: |
N/A |
| Comments: | Fluoride is a micronutrient that plants require, but high levels of the nutrient are toxic to many plants. |
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