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Cereals: Wheat: Rust (Leaf - Puccinia
triticina and Stem - P. graminis f. sp. tritici)
Pub 812: Field Crop Protection
Guide > Chapter
4: Cereals > Wheat: Rust (Leaf and Stem)
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Integrated Pest Management Options
- tebuconazole – Folicur 250 EW, Folicur 432 F
- prothioconazole + tebuconazole - Prosaro 250 EC
- pyraclostrobin – Headline EC
- azoxystrobin + propiconazole - Quilt
- propiconazole – Tilt 250 E, Bumper 418 EC
- prothioconazole - Proline 480 SC
- trifloxystrobin + propiconazole – Stratego 250 EC
- mancozeb – Dithane DG, Rainshield NT
- Related links...
Integrated Pest Management Options
Leaf rust blows in from the southern U.S. late in the season. Minimize
stem rust by removing its alternate host, common barberry. Use tolerant
or resistant varieties to reduce risk of disease. There are many
different phenotypes (races), and wheat varieties vary in their
resistance/tolerance. The development of new races could result
in a once-resistant variety becoming susceptible over time. Consult
with your seed company and the Ontario Cereal Crops Committee Variety
Trial Results at www.gocereals.ca
for variety profiles. Use foliar treatments when flag leaf has 5-10
pustules (1% leaf area).
See Appendix J,
Cereal Growth Stages, on page 136.
| Active ingredient |
tebuconazole |
| Trade name |
Folicur 250 EW |
| Rate per hectare (product) |
375-500 mL per ha |
| Rate per acre (product) |
152-200 mL per ac |
| PHI* |
36 |
| Comments |
Ground and aerial application. Apply to leaf foliage at the
first sign or very early stage of disease, especially if weather
conditions are conducive to disease development, up to the
end of the flowering stage. Use the higher rate when weather
conditions are conducive to heavy disease development. The
use of a non-ionic surfactant (Agral 90 or Agsurf) is NOT
required as it is built into the formulation. Use a minimum
of 100 L/ha of water for ground application, 47 L/ha of water
for aerial application. Maximum 1 application/yr. 12-hr re-entry
period.
Before using Folicur for wheat leaf diseases, consider
that Folicur can only be applied once per year and has been
traditionally used for Fusarium control, where applications
are targeted at head emergence.
|
| Active ingredient |
tebuconazole |
| Trade name |
Folicur 432 F |
| Rate per hectare (product) |
220-292 mL per ha |
| Rate per acre (product) |
90-118 mL per ac |
| PHI* |
36 |
| Comments |
Ground and aerial application. Apply to leaf foliage at the
first sign or very early stage of disease, especially if weather
conditions are conducive to disease development, up to the
end of the flowering stage. Use the higher rate when weather
conditions are conducive to heavy disease development. Use
non-ionic surfactant such as Agral 90 or Agsurf at 0.125%
vol/vol. Use a minimum of 100 L/ha of water for ground application,
47 L/ha of water for aerial application. Maximum 1 application/yr.
12-hr re-entry period.
Before using Folicur for wheat leaf diseases, consider
that Folicur can only be applied once/year and has been traditionally
used for Fusarium control.
|
| Active ingredient |
prothioconazole + tebuconazole |
| Trade name |
Prosaro 250 EC |
| Rate per hectare (product) |
800 mL per ha |
| Rate per acre (product) |
324 mL per ac |
| PHI* |
36 |
| Comments |
Ground and aerial application. Use a minimum of 100 L/ha
of water for ground application, 50 L/ha of water for aerial
application. Maximum 1 application/yr. 12-hr re-entry period.
|
| Active ingredient |
pyraclostrobin |
| Trade name |
Headline EC |
| Rate per hectare (product) |
300-600 mL per ha |
| Rate per acre (product) |
121-240 mL per ac |
| PHI* |
Do not apply at boot stage and beyond |
| Comments |
For leaf rust control only. Ground and aerial
application. Apply only up to flag leaf fully emerged stage
(Zadok's 39). Do not apply at boot stage (Zadok's 47) and beyond.
Maximum 2 applications/yr. 12-hr re-entry period. |
| Active ingredient |
azoxystrobin + propiconazole |
| Trade name |
Quilt |
| Rate per hectare (product) |
0.75–1.0 L per ha |
| Rate per acre (product) |
305–406 mL per ac |
| PHI* |
Do not apply at boot stage and beyond |
| Comments |
Ground and aerial application. Apply only up to flag leaf
fully emerged stage (Zadok's 39). Do not apply at boot stage
(Zadok's 47) and beyond. When expecting high disease pressure
from stripe rust and wheat leaf rust, use the higher application
rate of 1 L/ha. Do not harvest for forage. Maximum 1 application/yr.
12-hr re-entry period.
|
| Active ingredient |
propiconazole |
| Trade name |
Tilt 250 E |
| Rate per hectare (product) |
500 mL per ha |
| Rate per acre (product) |
200 mL per ac |
| PHI* |
45 |
| Comments |
Ground and aerial application. Apply at early signs of disease
from the beginning of stem elongation (Zadok's 29-37). If conditions
favourable to disease continue, apply again, if necessary, before
head is half emerged (Zadok's 49-55). Can be tank-mixed with
several cereal herbicides. Maximum 2 applications/yr. |
| Active ingredient |
propiconazole |
| Trade name |
Bumper 418 EC |
| Rate per hectare (product) |
300 mL per ha |
| Rate per acre (product) |
121 mL per ac |
| PHI* |
45 |
| Comments |
Ground and aerial application. Apply at early signs of disease
from the beginning of stem elongation (Zadok's 29-37). If conditions
favourable to disease continue, apply again, if necessary, before
head is half emerged (Zadok's 49-55). Can be tank-mixed with
several cereal herbicides. Maximum 2 applications/yr. |
| Active ingredient |
prothioconazole |
| Trade name |
Proline 480 SC |
| Rate per hectare (product) |
315 mL per ha |
| Rate per acre (product) |
128 mL per ac |
| PHI* |
30 |
| Comments |
Ground application only. Use as a preventative
when earliest disease symptoms appear on the leaves and stems.
Recommended to be used with the registered non-ionic surfactant,
Agral 90 or AgSurf at 0.125% vol/vol. Minimum 7-day interval
between applications. Maximum 2 applications/yr. 24-hr re-entry
period. |
| Active ingredient |
trifloxystrobin + propiconazole |
| Trade name |
Stratego 250 EC |
| Rate per hectare (product) |
500 mL per ha |
| Rate per acre (product) |
200 mL per ac |
| PHI* |
Do not apply at boot stage and beyond |
| Comments |
Ground and aerial application. Do not apply the second application
within 14 days of the first. Apply only up to flag leaf fully
emerged stage (Zadok's 39). Do not apply at boot stage (Zadok's
47) and beyond. Can be tank-mixed with Buctril M in wheat. Maximum
2 applications/yr. 12-hr re-entry period. |
| Active ingredient |
mancozeb |
| Trade name |
Dithane DG |
| Rate per hectare (product) |
Early: 1.1 kg per ha |
| Rate per acre (product) |
Early: 440 g per ac |
| Rate per hectare (product) |
Late: 2.25 kg per ha |
| Rate per acre (product) |
Late: 900 g per ac |
| PHI* |
40 |
| Comments |
For leaf rust control only. Use lower rate
for applications at Zadok's 12-21 growth stage, when crop is
in 3rd leaf to tillering. Higher rate for applications at Zadok's
59 growth stage when head is fully emerged but prior to flowering.
Do not graze crop or cut for hay. |
| Active ingredient |
mancozeb |
| Trade name |
Rainshield NT |
| Rate per hectare (product) |
Early: 1.1 kg per ha |
| Rate per acre (product) |
Early: 440 g per ac |
| Rate per hectare (product) |
Late: 2.25 kg per ha |
| Rate per acre (product) |
Late: 900 g per ac |
| PHI* |
40 |
| Comments |
For leaf rust control only. Use lower rate
for applications at Zadok's 12-21 growth stage, when crop is
in 3rd leaf to tillering. Higher rate for applications at Zadok's
59 growth stage when head is fully emerged but prior to flowering.
Do not graze crop or cut for hay. |
Related links...
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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