Xanthomonas campestris pv. glycines

Bacterial Disease

Xanthomonas campestris pv. glycines

Bacterial Disease

One difference between bacterial pustule and bacterial blight is that bacterial pustule development is not reduced by high temperature. Consequently, bacterial pustule can develop throughout the growing season whenever wet conditions occur. Severe development of this disease can cause defoliation.

Symptoms of bacterial pustule consist of small yellow spots with reddish-brown centers. Later, in the center of the spots, a small raised pustule develops, which is most noticeable on the under-side of the leaf. Infections are common on younger leaves which are more susceptible than older leaves. Bacterial pustule is easily mistaken for soybean rust, a potentially more damaging disease.