2/26/2025 - By Dr. Paul Giordano

Study: Aerification Recovery and Traffic Stress Recovery with Amino Phyte Program

Location: West Lafayette, IN & North Brunswick, NJ

Collaborator: Lee Miller, Ph.D. (Purdue University), Jim Murphy, Ph.D. (Rutgers University)

Date: Summer 2024

Conclusion: The Amino Phyte program consists of several Harrell’s products combined in a tank mix to offer both disease control and abiotic stress mitigation.

• Title Phyte Systemic Fungicide
• Amino Pro V
• Par SG
• Activator + SA

This flexible, cost-effective approach has shown to improve putting green quality and health throughout stressful periods on both cool and warm season turfgrass species. The trials conducted in 2024 aimed to identify the benefits of the Amino Phyte program under significant traffic stress throughout the summer, as well as the contribution this program offers in recovery from core aerification. Findings indicate that the Amino Phyte program significantly improves disease control and turf quality during biotic and abiotic stress events throughout the summer.

Summer Stress and Aerification Recovery (Purdue)

Treatments of the Amino Phyte program were applied on either 7-day or 14-day intervals to a primarily Poa annua putting green surface with a 0.120” HOC. Treatments were carried out from May 21 – Sept 10 with hollow tine aerification being conducted on Aug 14. An industry standard phosphonate-based product was used as a positive control comparison. Recovery and percent green cover were measured visually. The Amino Phyte program had significantly better recovery from aerification than the untreated and the industry standard as well as significantly better cumulative turf quality throughout the duration of the trial. Additionally, the Amino Phyte treatments had significantly lower anthracnose and brown patch incidence compared to the fertilized control and industry standard throughout the trial.

Traffic Stress Study (Rutgers)

Treatments of the Amino Phyte program and the industry standard were applied on 14-day intervals to a creeping bentgrass putting green surface with a 0.11” HOC. Treatments were carried out from May 20– Aug 27 with wear stress being carried out 12x per week with the Rutgers Wear Simulator. Background fertility and fungicide sprays were kept consistent across all plots in the trial. Overall turf density, quality, and green cover throughout the duration of the trial were significantly higher in the Amino Phyte and industry standard treated plots compared to the fertilized control. There were no significant differences between the fertilized control and the Amino Phyte treatments across variables measured.

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