Posterity and Secure Action fungicides are the latest dollar spot control products in the Syngenta portfolio. Posterity, the most-active SDHI in the turf market, holds strong for up to 28 days of dollar spot control plus consistent control of spring dead spot and fairy ring. Secure Action includes a boost of
acibenzolar-S-methyl (ASM) to protect against biotic stress, like dollar spot, and abiotic stress, like drought and heat.
Click on their respective logos below to learn more about them.
Dollar Spot Solutions in Action
Syngenta has thoroughly tested the performance of Posterity and Secure Action on golf courses and at research centers across the country. View the results, and watch interviews with independent researchers by clicking each marker below or clicking the arrows on the sides.
Agronomic Approach to Dollar Spot Control
When building an agronomic program, it is important to include multi-site contact fungicides like Secure Action or Daconil® Action™ as the foundation. It is also recommended to include fungicides with other modes of action like Briskway® or Headway® to manage resistance and control multiple pathogens, all season long. Below are sample programs to help you understand how to condition your turf to defend against dollar spot so it performs at its best and quickly recovers from biotic and abiotic stress.
Sample agronomic program for fairways
*Sample program represents rates used in 21-day agronomic program image above.
Sample agronomic program for greens
To find an agronomic program tailored to your specific region and grass type, visit our Interactive Agronomic Programs finder. Or contact your local territory manager to order an agronomic program poster for easy reference all season long.
SDHI Resistance Management
Over the years, generations of SDHI fungicides have been widely adopted because of their broad-spectrum control. However, it is important to understand that SDHIs are single-site fungicides that only attack one point in a pathogen. If the disease mutates, the pathogen can overcome the action of the fungicide and prevent the product from actively binding to it, which makes the fungi more likely to develop resistance.
To help combat this, we recommend the following best practices for SDHI resistance management:
- Follow a Syngenta agronomic program that times preventive applications based on conditions that favor pathogen growth
- Do not make more than two sequential applications of any SDHI
- For diseases that are highly susceptible to resistance like dollar spot and anthracnose, rotate after each SDHI application.
- Rotate and/or tank-mix Posterity or Velista® fungicide with low- or medium-risk chemistries that are not in FRAC Group 7
- On greens, tank-mix and/or rotate Velista and/or Posterity with Daconil Action, Secure Action and Briskway fungicides
- On fairways, rotate Posterity with Secure Action and/or Daconil Action
- Make preventive applications, which are active before a pathogen is present. Curative applications with SDHIs can accelerate resistance development as more pathogens are exposed to the curative application than the preventative application.
- If curative applications are required, Secure Action is an excellent choice for curative control for both efficacy and resistance management.
Dollar Spot Experts
Watch Lisa Beirn, Ph.D., research and development scientist at Syngenta, discuss her work surrounding the discovery of four new species of the dollar spot fungus.
Jim Kerns, Ph.D. explains why he developed the dollar spot prediction model, and how it can help you make timely applications for dollar spot control.
Dollar Spot Webinar: New Research and Technology for Improved Control
During this 60-minute webinar, Lisa Beirn, Ph.D., and Matt Giese, MS will discuss strategies for dollar spot and brown patch management including cultural practices and optimizing fungicide efficacy. They will introduce three new fungicides that have been specifically engineered for managing these top two diseases in cool-season golf course turf.