Fungicide Products Registered

A Fungicide spray program may reduce FHB damage. Under optimal application conditions, reductions in FHB severity of 50 to 60 percent and reduction in DON levels of 30-50 percent can be achieved when fungicides are applied at early flowering for wheat and durum, and at early heading in barley. A class of fungicides, called triazoles, are recommended for FHB suppression, as they are locally systemic and have been shown to reduce both FHB and DON.

The following table lists products currently available for FHB suppression (data derived from the North Central Regional Committee (NCERA-184) of Small Grain Pathologists).

Fungicide1

Product names

Rate/A
fl oz/A

Head Scab
efficacy

Preharvest
interval

Metconazole

Caramba

10.0 – 17.0

G2 (VG)2,3

30 days

Propiconazole

Tilt, PropiMax, others

4.0

P2

40 days

Prothioconazole

Proline

5.0 – 5.7

G2 (VG)2,3

30 days (32 for barley)

Prothioconazole + Tebuconazole

Prosaro

6.5

VG2

30 days

Tebuconazole

Folicur, Embrace, Onset, Orius, Monsoon, TebuStar, Tergol, Toledo, others

4.0

F2

30 days

1All listed fungicides have federal registration for FHB suppression. However, individual state registrations may vary and state registrations and rules must be followed in state where product is applied. 2 Rating Scale: VG=very good, G = Good, F= Fair, P= Poor. 3VG rating when higher rate is used.

Further information: http://www.scabusa.org/pdfs/News-Fungicides_08-3.pdf