Compiled by Ray Weil,
- Boron deficiency on cauliflower. Note internal rot. This type of symptom often occurs at the plant growing point.
- Boron deficiency on clover. Note reddish color of younger leaves.
- Calcium deficiency on Sorghum-Sudangrass. Note that new leaves stick together and fail to properly unfold. Associated with very acid soil.
- Calcium deficiency on tomato. Note rot on the end of the fruit to which the blossom was attached. Similar symptoms occur in melons and are associated with lack of Ca and uneven moisture.
- Chloride deficiency on durum wheat. This is one of the few confirmed instances of Cl deficiency in field grown plants.
- Copper deficiency in barley. Note whitish leaf tips poorly unfolded. Most common on acid sandy soils.
- Iron deficiency on azalea. Note Interveinal chlorosis on the youngest leaves. This symptom disappears within a day or two if leaves are sprayed with iron solution.
- Iron deficiency on rose. Iron deficiency is usually associated with higher than optimum soil pH.
- Magnesium deficiency on grape. Note Interveinal chlorosis on older leaves.
- Magnesium deficiency on poinsettia. Note Interveinal chlorosis on oldest leaves.
- Manganese deficiency on soybean. Note Interveinal chlorosis on younger leaves. Usually associated with higher than optimum soil pH.
- Molybdenum deficiency on cauliflower. Note "whiptail"-like elongated, misshapen central leaves. Usually associated with lower than optimal soil pH.
- Nitrogen deficiency on corn (maize). Note chlorosis of the oldest leaves, starting at the tip and proceeding down the midrib.
- Nitrogen deficiency on tobacco. Note chlorosis (yellowing) of leaves, most pronounced on the oldest leaves.
- Phosphorus deficiency on corn (maize). Note stunted stature and purple coloring of leaf edges and lower stem.
- Phosphorus deficiency on grape. Note reddish/purple coloring of oldest leaves.
- Phosphorus deficiency on tomato seedling. Note purpling, especially on underside of leaves and veins.
- Potassium deficiency on alfalfa. Note white speckles of necrotic tissue near tip and edges of older leaves.
- Potassium deficiency on corn (maize) leaves from the bottom of the plant. Note "burned" necrotic leaf edges.
- Potassium deficiency on soybean. Note chlorosis (and later necrosis) of edges of older leaves.
- Sulfur deficiency on corn (maize). Note general chlorosis and spindling growth, with most chlorosis on newer leaves.
- Sulfur on tea. Note "tea yellows" symptom, chlorosis of younger leaves, but not older leaves.
- Sulfur on tomato. Note stunted growth and yellowish color compared to normal plant. Chlorosis most pronounced on younger leaves.
- Zinc deficiency on citrus tree. Note "blotchy" Interveinal chlorosis on young leaves. Often also causes a rosette-like whirl of stunted leaves in a symptom called "little leaf".
- Zinc on corn (maize). Note the broad band of whitish or chlorotic tissue on either side of the mid-rib, especially on mature leaves.
Department of Environmental Science and Technology,
University of Maryland.
Counter started end of February 2007