How to Identify Frogeye Leaf Spot
Prompt identification of Frogeye leaf spot is crucial for its effective management and control.
Frogeye leaf spot derives its name from its distinctive symptoms. On soybean leaves, it triggers circular to angular spots that start small and dark. As the disease evolves, these spots expand to about ¼ inch in diameter and develop a gray to brown center with a reddish-purple margin, mimicking a “frogeye” appearance.
A severe infection can cause these spots to merge, leading to large, dead areas on the leaves. The disease can also trigger elongated, dark lesions on stems and pods.
Beyond visual symptoms, laboratory testing can confirm the presence of Cercospora sojina. It's vital to distinguish it from other diseases like Target Spot and Brown Spot, which can exhibit similar symptoms.
