Transcription
  • Visual symptoms on upper leaves or lower leaves? Lower Leaves. Upper Leaves.
  • Select Symptom:. Leaf edges brown or scorched. Death of growing points. Leaf yellowing. Interveinal Chlorosis (yellowing between veins).
  • Sulfur (S) Deficiency: Younger leaves turn yellow, sometimes followed by older leaves. Plants absorb sulfur in the form of sulfate. This readily leaches from the soil. Sulfur may acidify the soil pH (lower) Add anything with the word "sulfate".
  • Have you added calcium recently? No. Yes.
  • Calcium (Ca) Deficiency: Desert soils and river/well water usually have plenty of calcium so deficiencies are rare. Excissive calcium can limit the availability of other nutrients. Add anything with the word "calcium"; also gypsum.
  • Ammonium Toxicity.
  • Select Symptom:. Terminal leaves rosetted (bunched up). Palm fronds are stunted and deformed (frizzle top). Reduction in size of plant parts (leaves, shoots, fruits). Dead spots or patches.. Yellowing occurs between the veins of young leaves. Already added Iron, Manganese, Zinc, and Copper.... Leaves are dark green, plant is stunted.
  • Iron (Fe) Deficiency: Plants absorb iron as an ion through their foliage as well as their roots. Uptake is strongly affected by pH. Chelated iron is readily available for use by the plant, other forms of iron may be tied up in the soil. Add anything with the word "Iron chelate".
  • Manganese(Mn) Deficiency: Plants absorb manganese as an ion throuugh their foliage as well as their roots. Add anything with the words "manganese" or "manganous". Often required with Zinc application.
  • Zinc (Zn) Deficiency: Plants absorb zinc as an iron through their foliage as well as their roots. High pH may limit the availability.
  • Copper (Cu) Deficiency: Plants absorb copper as an ion through their roots. Add anything with the words "copper", "cupric", or "cuprous".
  • Excess Phosphorus.
  • Select Sympton:. Terminal buds die, witches brooms form. Already added Calcium and Boron and pH'd the water..... New leaves are distorted, irregularity shaped, or dying (blossom end rot).
  • Boron (B) Deficiency: Plants absorb boron in the form of borate. Problems are seen in intensely cropped areas. Add anything with the words "borax" or "borate".
  • Calcium (Ca) Deficiency: Desert soils and river/well water usually have plenty of calcium so deficiencies are rare. Excissive calcium can limit the availability of other nutrients. Add anything with the word "calcium"; also gypsum.
  • Ammonium toxicity.
  • Select symptom:. Browning of leaf edges with interveinal chlorosis beginning at the base, scorching inward from leaf margins. Yellow edge with a green arrowhead shape in the center of the leaf along with interveinal chlorosis. General Leaf Yellowing. Leaf tips look burnt followed by leaves turning dark green or reddish-purple.
  • Phosphorus (P) Deficiency: Plants absorb phosphorus in the form of phosphate. This form dissolves only slightly in water, but Ph strongly affects uptake. Add anything with the words "phosphate" "bone" or Greensand..
  • Nitrogen (N) Deficiency: Most plants absorb nitrogen in the form of ammonium or nitrate. These forms readily dissolve in water and leach away. Add anything with the words "ammonium" "nitrate", "urea", also composted animal manures.
  • Have you added Potassium recently? Yes. No.
  • Potassium (K) Deficiency: Plants absorb potassium as an ion, which can be readily leached from the soil. Add anything with the words "potassium" or "potash".
  • Either Salt Toxicity or Boron Toxicity.
  • Have you added Magnesium recently? No. Yes.
  • Magnesium (Mg) Deficiency: Plants absorb magnesium as an ion which is readily leached from the soil, especially when calcium is not present at adequate levels. Add anything with the word "magnesium" or "magnesium sulfate" (Epsom Salts).
  • Excess Potassium.

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