Determining the Sensitivity of Early Cercospora Arachidicola and Late Cerosporidium Personatum Leaf Spot to the Strobilurin Fungicides Pyraclostrobin and Azoxystrobin


University of Florida

Budget ID:


Project ID:


Report BID:




Southeast (GA, FL, AL)

State Group:


Project Fiscal Year:




Report Type:

Report Received Date:



Project NPB Budget:


In recent years, the efficacy of sterol fungicides (i.e., tebuconazole) to control early leaf spot (ELS) and late leaf spot (LLS) diseases has decreased, which has led costly adjustments in many peanut spray management programs. Often the overuse of a fungicide in disease management programs can lead to this reduction in product efficacy. An increase in the use of the strobilurin fungicides azoxystrobin (Abound) and pyraclostrobin (Headline) is expected as the patents expire on these fungicides in the next few years. Resistance to strobilurin fungicides has already been observed in the soybean pathogen Cercospora sojina, which is closely related to the ELS and LLS pathogens. Establishing a program to monitor sensitivity of the leaf spot pathogens to these fungicides will be critical for maintaining and monitoring the utility of these "at-risk" fungicides in the future.

Click to Download

You must be logged in to view this item.

This area is reserved for members of the news media. If you qualify, please update your user profile and check the box marked "Check here to register as an accredited member of the news media". Please include any notes in the "Supporting information for media credentials" box. We will notify you of your status via e-mail in one business day.