Newly Registered and Organic Fungicides for Apple
*Mention of a product is not an endorsement. This article is not a substitute for the product label, follow the directions on the fungicide label.
Excalia (Valent USA) received registration in Wisconsin in 2021 for use in apples targeting apple scab, powdery mildew, and the juniper rusts.
| FRAC group | Active ingredient(s) | Pre-Harvest Interval (PHI) | Restricted Entry Interval (REI) | Application notes |
| 7, SDHI | inpyrfluxam | Petal fall | 12 hours | No more than 2 spray applications/year; no applications after petal fall |
Cevya (BASF), is a newer demethylation inhibitor (DMI) fungicide for apple scab control. It offers control for fungicide resistant strains. Provides excellent control of apple scab.
| FRAC group | Active ingredient(s) | Pre-Harvest Interval (PHI) | Restricted Entry Interval (REI) | Application notes |
| 3, DMI | mefentrifluconazole | 0 days | 12 hours | No more than 3 spray applications/year |
Aprovia (Syngenta) is a new SDHI fungicide targeted for apple scab and powdery mildew management early in the growing season with a 30-day PHI. Does suppress several summer rot diseases including bitter rot, black rot, and white rot, but applications must be made preventatively.
| FRAC group | Active ingredient(s) | Pre-Harvest Interval (PHI) | Restricted Entry Interval (REI) | Application notes |
| 7, SDHI | benzovindiflupyr | 30 days | 12 hours | Recommended for early season |
Stargus (Marrone Bio Innovations) is an OMRI-listed biofungicide with multiple modes of action. It only offers suppression for apple scab and fire blight.
| FRAC group | Active ingredient(s) | Pre-Harvest Interval (PHI) | Restricted Entry Interval (REI) | Application notes |
| BM02 | Bacillus amyloliquefaciens F727 | 0 days | 4 hours | Use caution when selecting spray adjuvants |
Blossom Protect (Westbridge) is not a new product, but it has been significantly researched for fire blight prevention in several states. It is an OMRI-listed biological control product that colonizes flowers to protect them from infection by the fire blight pathogen.
| FRAC group | Active ingredient(s) | Pre-Harvest Interval (PHI) | Restricted Entry Interval (REI) | Application notes |
| N/A | Aureobasidium pullulans strain DSM 14940 | 0 days | 4 hours | Should not be tank mixed with fungicides; can cause russeting in some varieties |