| Crop |
Disease |
Fungicide common name |
Fungicide trade name |
Formulated rate/acre |
Remarks |
| Wheat and Barley |
Powdery mildew on wheat (Erysiphe graminis f.sp. tritici) and
barley (Erysiphe graminis f.sp. hordei) |
propiconazole |
Tilt 3.6EC |
4.0 fl oz |
Scout fields weekly from Zadoks' growth stages (GS) 30 through 59 (Feekes'GS 5
through GS 10.5) head emergence. Examine plants from 5 to 10 randomly selected areas
within the field. Make application only when powdery mildew covers 5-10% of area of fully
expanded upper leaves (see leaf area figure), but not
before tillers have reached Zadoks'31 (Feekes' GS 6) first joint, except in the Tidewater
region south of the James River. Do not apply more than 4 fl oz/A per year or after
Zadoks' GS 59 (Feekes'GS 10.5), head emerged, but not flowering on wheat. Do not apply
after GS 37 on Barley. Do not graze or feed livesock treated forage or cut the green crop
for hay or silage. After harvest straw may be used for bedding. Follow all label
instructions. |
| propiconazole + trifloxystrobin |
Stratego 250EC |
10.0 fl oz |
| Wheat |
Leaf and glume blotch (Stagonospora nodorum) and Tan spot (Pyrenophora tritici-repentis) |
mancozeb |
Dithane M45 |
2.0 lb |
These fungicides are protestant types
that must be applied before infection to provide a barrier to prevent infection. Make
first application when flag leaf is fully emerged (Feekes' stage 10 or Zadoks' 45) and repeat when grain head is visible about
10-12 days later. Do not make last application within 26 days of harvest. Livestock may
not graze in treated areas within 26 days of last treatment. Penncozab is only registered
for use on wheat. |
| mancozeb |
Dithane F45 |
1.6 qt |
| mancozeb |
Dithane DF |
2.0 lb |
| mancozeb |
Manzate 200 |
2.0 lb |
| mancozeb |
Manzate DF |
2.0 lb |
| mancozeb |
Penncozeb |
1.5 - 2.0 lb |
| mancozeb |
Penncozeb DF |
1.5 - 2.0 lb |
| Wheat and Barley
Leaf rust (Puccinia recondita) of wheat
and barley
|
propiconazole |
Tilt 3.6EC |
4.0 fl oz |
Scout fields weekly from Zadoks' growth stages (GS) 30 through 59 (Feekes'GS 5
through GS 10.5). Examine plants from 5 to 10 randomly selected areas within the field.
Make application only when rust pustules cover 1-3% of area of fully expanded upper leaves
(see leaf area figure), but not before first joint (Feekes'
GS 6 or Zadoks' GS 31), except in Tidewater region south of the James River. See Figure 1.
Do not apply more than 4 oz/A/ year or after Feekes' GS 10.5 or Zadks' 59 on wheat. Do not
apply after Feekes' 8 or Zadoks' 37 on Barley. Do not graze or feed livestock treated
forage or cut the green crop for hay or silage. After harvest the straw may be used for
bedding or feed. Follow label instructions for additional precautions. |
| pyraclostrobin |
Headline 2.09EC |
6.0 - 9.0 fl oz |
Headline should be integrated
into an overall disease management strategy that includes proper
selection of cultivars with disease tolerance, removal of plant debris
in which inoculum overwinters, and plant residue management. Resistance
management: do not make more than two applications of
Headline/A/year. Determination of treatment threshold: Scout fields
weekly from Zadoks' growth stages
(GS) 30 through 69 (Feekes' GS 5 through 10.53). Examine plants from 5
to 10 randomly selected areas within the field. Make application only
when rust pustules cover 1% to 3% of area of fully expanded upper
leaves (see leaf area figure). Do not
apply to barley after Zadoks' GS 55 (Feekes' GS 10.3). Do not apply to
wheat after Zadoks' GS 69 (Feekes' GS 10.53). Do not harvest hay
within 14 days of application. |
| Wheat
Leaf Rust (Puccinia recondita)
|
azoxystrobin |
Quadris |
6.2 - 10.8 fl oz |
Quadris and Stratego should be integrated into an overall
disease management strategy that includes proper selection of varieties with disease
tolerance, proper timing and placement of irrigation, removal of plant debris in which
inoculum overwinters, plant residue management, and crop rotation. Resistance
management: Do not make more than two applications of Quadris or
Stratego per acre per year. Application
directions: Quadris or Stratego should be applied prior to or in the early stages of disease
development. Applications may be made at any time, immediately after jointing
(Feeks 6 or
Zadok's 31) up to late head emergence (Feekes 10.5 or Zadok's 59). A crop oil concentrate
adjuvant may be added at 1.0% V/V to optimize efficacy. Do not apply later than Feekes
growth stage 10.5 (Zadok's 59). Do not harvest treated wheat for forage. Do not apply more
than 0.77 quarts product/acre/season (0.4 lb ai/A). Do not apply within 14 days of harvest
for hay. Do not apply within 45 days of harvest for grain and straw. |
|
propoiconazole + trifloxystrobin |
Stratego 250EC |
10 fl oz |
| Barley and rye |
Barley scald (Rhynchosporium
secalis), Net blotch (Pyrenophora teres), |
propiconazole |
Tilt 3.6EC |
4.0 fl oz |
Scout fields weekly from Zadoks' growth stages (GS) 30 through 37 (Feekes' GS 5
through GS 8). |
| Wheat
Leaf and glume blotch (Stagonospora nodorum) and Tan spot (Pyrenophora tritici-repentis)
|
propiconazole |
Tilt 3.6EC |
4.0 fl oz |
Determination
of treatment threshold: Scout fields weekly from Zadoks'
growth stages (GS) 30 through 59 (Feekes' GS 5 through GS 10.5) head
emergence. For leaf and plume blotch collect main tillers from 10 plants from 10 randomly
selected areas within the field. Examine the appropriate indicator leaf (see Figure 3)
from each tiller and record the number of indicator leaves with one or more lesions. If
25% of the 100 indicator leaves have one or more lesions, then a fungicide application is
indicated. Quadris and
Stratego should be integrated into
an overall disease management strategy that includes proper selection of varieties with
disease tolerance, proper timing and placement of irrigation, removal of plant debris in
which inoculum overwinters, plant residue management, and crop rotation. Resistance
management: Do not make more than two applications of Quadris or
Stratego per acre per year. Application
directions: Quadris or Stratego should be applied prior to or in the early stages of disease
development. Applications may be made at any time, immediately after jointing (Feeks 6 or Zadok's 31) up to late head emergence (Feekes
10.5 or Zadok's 59). A crop oil concentrate adjuvant may be added at 1.0% V/V to optimize
efficacy. Do not apply later than Feekes growth stage 10.5 (Zadok's 59). Do not harvest
treated wheat for forage. Do not apply more than 0.77 quarts product/acre/season (0.4 lb
ai/A). Do not apply within 14 days of harvest for hay. Do not apply within 45 days of
harvest for grain and straw. |
| propiconazole + trifloxystrobin |
Stratego 250EC |
10.0 fl oz |
| azoxystrobin |
Quadris |
6.2 - 10.8 fl oz |
| pyraclostrobin |
Headline 2.09EC |
6.0 - 9.0 fl oz |
Headline should be integrated
into an overall disease management strategy that includes proper
selection of cultivars with disease tolerance, removal of plant debris
in which inoculum overwinters, and plant residue management. Resistance
management: do not make more than two applications of
Headline/A/year. Determination of treatment threshold: Scout fields
weekly from Zadoks' growth stages
(GS) 30 through 69 (Feekes' GS 5 through 10.53). For leaf and glume
blotch, collect main tillers from 10 plants from 10 randomly selected
areas within the field. Examine the appropriate indicator leaf (see Indicator
leaves) from each tiller and record the number of indicator
leaves with one or more lesions. If 25% of the 100 indicator leaves
have one or more lesions, then a fungicide application is indicated.
Do not apply to wheat after Zadoks' GS 69 (Feekes' GS 10.53). Do not
harvest hay within 14 days of application. |
| |
|
Indicator
leaves are: Flag-4 and flag-5 from Zadoks' GS 31-37 (Feekes' GS 6-8) Flag-3 from Zadok's GS 38-45 (Feekes' GS 8-10)
Flag-2 from Zadoks' GS 46-59 (Feekes' GS 10-10.5)
Do not treat before Zadoks' GS 31 (Feekes' GS 6) first joint
(see Figure 1), except in the Tidewater region south of James River. Do not apply more
than 4 fl. oz./acre per year or after Zadoks' GS 59 (Feekes' GS 10.50), head emerged, but
not flowering. Do not graze or feed livestock treated forage or cut the green crop for hay
or silage. After harvest straw may be used for bedding. Follow all label instructions. |
