Mississippi Soybeans: Miravis Fungicide Moves Closer – Good News, Cautionary Notes

Frogeye leaf spot. Photo from Mississippi State University

In late May, Syngenta announced EPA registration of its Adepidyn carboxamide fungicide. Products containing the fungicide will be marketed under the Miravis brand name.

The various Miravis products will be labeled for use on corn, soybeans, wheat, peanuts, grapes, vegetables and potatoes, depending on the pre-mix formulations.

The Miravis fungicide product line will include five brands that serve different markets, and will be available in late 2018, with full introduction anticipated in 2019. Of particular interest to Midsouth soybean producers will be Miravis Top to control frogeye leaf spot, target spot and Septoria brown spot.

Miravis Top is a combination of the Miravis active ingredient, Adepidyn, and difenoconazole (which is one of the active ingredients in Quadris Top). This product should offer control of strobilurin-resistant frogeye leaf spot and the adepidyn component will have activity on leaf spot diseases in soybeans.

A related product, Miravis Neo, combines the active ingredient in Miravis with propiconazole (active ingredient in Tilt), and azoxystrobin (active ingredient in Quadris). That brings 3 modes of action to the field. It will offer control of a range of corn diseases, as well as frogeye leaf spot and Septoria brown spot in soybeans.

As stated above, adepidyn fungicide has received federal EPA registration, with state registrations pending.

Performance Data Not Yet Available.

So far, I am not aware of any available efficacy data for these products, but I assume that both Syngenta and university plant pathologists who have tested the chemistry will make information available.

Hopefully, this product will provide producers with a new weapon against troublesome soybean leaf spot diseases, as well as provide a new tool to manage strobilurin-resistant frogeye leaf spot.

Cautionary notes:

  • Producers should consider this potential new fungicide tool as a rare gift that should not be overused as was the case with earlier fungicides such as Quadris. In other words, use this new tool only where needed to control verified cases of targeted disease presence.
  • Rotate this fungicide with other fungicides that contain ingredients with a different mode of action where possible to control a targeted disease pathogen.
  • Above all, do not apply it on all soybean acres to obtain its touted “plant health” benefits, since this will eventually lead to pathogen resistance to this fungicide ingredient and its subsequent loss as a disease management tool. Click here for a detailed discussion of this subject.

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