UNL CropWatch May 19, 2010: Stripe Rust Widespead Table 1

UNL CropWatch May 19, 2010: Stripe Rust Widespead Table 1

May 19, 2010

This information is provided only as a guide. It is the responsibility of the pesticide applicator by law to read and follow all current label directions. No endorsement is intended for products listed, nor is criticism meant for products not listed. Members or participants in the NCERA-184 committee assume no liability resulting from the use of these products.  (See full story and photos.)

Table 1. Fungicide efficacy for control of wheat diseases based on appropriate application timing. (Revised 4-05-10) Source: North Central Regional Committee on Management of Small Grain Diseases (NCERA-184)

Fungicide(s)
Powdery mildew

Stagonospora leaf/glume blotch

Septoria leaf blotch Tan spot Stripe rust Leaf rust Stem rust5 Head scab Harvest restriction
Class Active Ingredient Product Rate/A (fl oz)

Strobilurin

Azoxystrobin 22.9%

Quadris 2.08 SC

6.2 - 10.8

F(G)1

VG

VG

E

E2

E

VG

NR

Apply
up to
Feekes 10.56

Pyraclostrobin 3.6%

Headline 2.09 EC

6.0 - 9.0

G

VG

VG

E

E2

E

G

NR

Apply
up to
Feekes 10.5

Triazole

Metconazole 8.6%

Caramba 0.75 SL

10.0 - 17.0

VG

VG

3

VG

E

E

E

G

30 days

Propiconazole 41.8%

Tilt 3.6 EC PropiMax 3.6 EC Bumper 41.8 EC

4.0

VG

VG

VG

VG

VG

VG

VG

P

Apply
up to
Feekes 10.5

Prothioconazole 41%

Proline 480 SC

5.0 - 5.7

3

VG

VG

VG

3

VG

VG

G

30 days

Tebuconazole 38.7%

Folicur 3.6 F4

4.0

G

VG

VG

VG

E

E

E

F

30 days

Prothioconazole19%
Tebuconazole 19%

Prosaro 421 SC

6.5 - 8.5

G

VG

VG

VG

E

E

E

G

30 days

Mixed mode of action

Metconazole 7.4%  Pyraclostrobin 12%

TwinLine 1.75 EC

7.0 – 9.0

G VG

VG

E

E

E

VG

NR

Apply
up to
Feekes 10.5

Propiconazole 11.7%
Azoxystrobin 7.0%

Quilt 200 SC

14.0

VG

VG

VG

VG

E

E

VG

NR

Apply
up to
Feekes 10.5

Propiconazole 11.7%
Azoxystrobin 13.5%

Quilt Xcel 2.2 SE

14.0

3

VG

3

3

3

VG

3

NR

Apply
up to
Feekes 10.5

Propiconazole 11.4%
Trifloxystrobin 11.4%

Stratego 250 EC

10.0

G

VG

VG

VG

VG

VG

VG

NR

35 days

1 Efficacy categories: NR=Not Recommended; P=Poor; F=Fair; G=Good; VG=Very Good; E=Excellent. Efficacy designation with a second rating in parenthesis indicates greater efficacy at higher application rates.
2 Efficacy may be significantly reduced if solo strobilurin products are applied after stripe rust infection has occurred
3 Insufficient data to make statement about efficacy of this product
4 Multiple generic products containing tebuconazole may also be labeled in some states. These products include: Muscle 3.6 F, Orius 3.6 F, Tebucon 3.6 F, Tebustar 3.6 F, Tebuzol 3.6 F, Tegrol , & Toledo
5 Estimates of fungicide efficacy against stem rust are based on a small number of observations, and may be less reliable than the ratings for other diseases.
6Fully headed growth stage