|Disease: Iron Deficiency Chlorosis|
Your Soybean Checkoff.
Iron Deficiency Chlorosis - Symptoms
|Iron deficiiency can look similar to potassium deficidency.
From: Is it potassium or iron deficiency? Iowa State University Entomology Image Gallery
Symptoms appear on the youngest upper leaves. The leaves are yellow, with the veins remaining green. The older trifoliolate leaves remain green.If deficiency persists or is severe, leaves turn white and plant growth is stunted.
The intensity of chlorosis may increase or diminish during the growing season, depending on growing conditions and changes in soil chemistry. The symptoms are more pronounced when soil temperature is low and moisture is high.
Root rot often occurs on plants suffering from iron chlorosis. This is thought to be due to the increased susceptibility of chlorotic plants to root pathogens. Cysts of soybean cyst nematodes, which are favored in high pH soils, are often found on plants showing iron chlorosis symptoms.