The major diseases of soy in Oklahoma are caused by fungi, bacteria, and nematodes that attack seed, seedlings, roots, foliage, pods, and stems. Conditions favourable for disease development can result in stand loss, reduction in seed quality, and occasionally yield losses. Severity of disease development and need for control are influenced by varietal selection and environmental conditions. Correct identification and early detection are critical in the proper management of soy diseases.
Seedling diseases are caused by a group of fungi, acting independently or together, that cause similar symptoms on young plants. These diseases are classified as being either pre-emergence or post-emergence. Seedlings that become diseased prior to emerging through the soil surface are described as having pre-emergence seedling disease.
A basic strategy for control of soy diseases is prevention. The following suggestions are offered in an attempt to provide soy producers some basic components that will aid in the prevention of soy diseases.
Article made possible through the contribution of Oklahoma State University.