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FUNGAL LEAF SPOT Fungal leaf spots may be bordered by chlorotic (yellow) areas. Photo by Plant Disease Clinic |
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OEDEMA Pale green or water-soaked blisters or bumps erupt and turn brown or black, and may have a corky appearance. Photo by Plant Disease Clinic |
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FLUORIDE TOXICITY Margins and tips of leaves turn yellow and/or brown. In some plants, elliptical, brown lesions form between the leaf veins. Photo by Janna Beckerman |
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NORMAL PHYSIOLOGY Brown crystals on stem. Photo by Plant Disease Clinic |
