In addition to crop rotation, residue management and resistant hybrids,
foliar fungicides can be used to control corn foliage diseases. Products
labeled for use on field corn are listed in the following table. Fungicide
labels do differentiate among field corn, seed corn, sweet corn and
processing sweet corn. Other products not listed in this table may be
labeled for use on other types of corn.
The following table was prepared using current company product labels and
manufacturers' Web sites. However, label registrations can change at any
time. Before using any agricultural pesticide, read and follow directions
accompanying that product. Product names have been used for clarity.
Reference to specific trade names does not imply endorsement by the
University of Missouri; discrimination is not intended against similar
products not listed.
Trade Name
Company |
Common Chemical Name |
% of Active Ingredients |
Rate |
Additional Label Information |
Bumper 41.8 EC
Makhteshim-Agan |
propiconazole |
41.80% |
2.0 to 4.0 fl oz per acre |
For control of Helminthosporium leaf blights (Helminthosporium maydis, H. turcicum, and H. carbonum), rusts, gray leaf spot, and eye spot, apply Bumper 41.8 degrees Celsius by ground or aerial application or through irrigation equipment according to the following schedule:
Helminthosporium leaf blights: apply 2.0 to 4.0 fl oz of Bumper 41.8 degrees Celsius per acre when disease first appears and continue on a 7 to 14 day schedule.
Rusts: apply 4.0 fl oz of Bumper 41.8 degrees Celsius per acre when rust pustules first appear and continue on a 7 to 14 day schedule.
Gray leaf spot and eye spot: apply 4.0 fl oz of Bumper 41.8 EC per acre when disease first appears. If conditions favorable for disease persist, continue to apply on a 14 day schedule.
Do not apply Bumper 41.8 degrees Celsius to field corn and field corn grown for seed after silking. Do not apply more than 16 fl oz of Bumper 41.8 degrees Celsius per acre per season.
Do not harvest field corn, field corn grown for seed or popcorn for forage within 30 days of last application. |
Dithane DF Rainshield
Dow AgroSciences |
mancozeb |
75.00% |
1.5 lb per acre |
For control of common corn rust and Helminthosporium leaf blight on field corn and hybrid seed corn.
Start applications when disease symptoms first appear and, depending on severity of infection, continue on a 4 to 14 day schedule. The addition of Latron CS-7 will improve performance.
Amount of product that can be applied over course of season will vary with formulation- see label.
Do not apply within 40 days of harvest. |
Dithane F-45 Rainshield
Dow AgroSciences |
mancozeb |
37.00% |
1.2 qt per acre |
Dithane M45
Dow AgroSciences |
mancozeb |
80.00% |
1.5 lb per acre |
Headline
BASF |
pyraclostrobin |
23.60% |
6.0 to 9.0 fl oz per acre
or
9.0 to 12.0 fl oz per acre |
The 6.0 to 9.0 fl oz per acre rate targets common rust, southern rust and gray leaf spot.
The 9.0 to 12.0 fl oz per acre rate targets anthracnose, northern corn leaf blight, northern corn leaf spot, Physoderma brown spot, southern corn leaf blight and yellow leaf blight.
For optimal disease control, begin applications of Headline prior to disease development and continue on a 7- to 14- day interval if conditions are conducive for disease development. Use the higher rate and shorter interval when disease pressure is high.
Headline may be used with adjuvants. Headline may be applied by ground sprayer, aerial equipment or through sprinkler irrigation systems.
See label for information on resistance management.
Minimum time from last application to harvest (PHI) is 7 days. |
Manzate Pro-Stick
DuPont |
mancozeb |
75.00% |
1.5 lb per acre |
For control of common rust, Helminthosporium leaf blight and gray leaf spot on field corn and field corn for hybrid seed production.
Use sufficient water for thorough coverage. Start applications when disease first appears and repeat at 4 to 7 day intervals.
Do not apply more than 15 lb or 12 qt/ acre/ season. Do not feed treated forage to livestock. Do not apply within 40 days of harvest. |
Manzate Flowable
Griffin L.L.C. |
mancozeb |
37.00% |
1.2 qt per acre |
Penncozeb 4FL
Cerexagri |
mancozeb |
37.00% |
0.8 to 1.2 fl oz per acre |
For control of common rust, gray leaf spot and Helminthosporium leaf blight on field corn and corn grown for seed.
Start application at the onset of disease and repeat as needed.
Amount of product that can be applied over course of season will vary with formulation- see label.
Do not apply within 40 days of harvest. |
Penncozeb 75DF
Cerexagri |
mancozeb |
75.00% |
1.0 to 1.5 lb per acre |
Penncozeb 80WP
Cerexagri |
mancozeb |
80.00% |
1.0 to 1.5 lb per acre |
PropiMax EC
Dow AgroSciences |
propiconazole |
41.80% |
2.0 to 4.0 fl oz per acre |
For control of Helminthosporium leaf blights (Helminthosporium maydis, H. turcicum and H. carbonum), rusts (Puccinia spp.), gray leaf spot (Cercospora zeae maydis), and eye spot (Kabatiella zeae), apply PropiMax EC by ground or aerial application or through irrigation equipment according to the following schedule:
Helminthosporium leaf blights: apply PropiMax EC at the rate of 2-4 fl oz per acre when disease first appears and make repeat applications on a 7 to 14-day schedule.
Rusts: apply PropiMax EC at the rate of 4 fl oz per acre when rust pustules first appear and continue on a 7 to 14-day schedule.
Gray leaf spot and eye spot: apply PropiMax EC at the rate of 4 fl oz per acre when disease first appears. If conditions favorable for disease persist, continue to apply on a 14-day schedule.
Do not apply PropiMax EC to field and field corn grown for seed after silking. Do not apply more than 16 fl oz of PropiMax EC per acre per season. Do not harvest field corn, field corn grown for seed, or popcorn for forage within 30 days of application. |
Quadris
Syngenta |
azoxystrobin |
22.90% |
6.0 to 9.0 fl oz per acre for rust
(Puccinia sorghi)
9.0 to 15.5 fl oz per acre for anthracnose leaf blight, gray leaf spot, northern corn leaf blight, northern corn leaf spot, southern corn leaf blight or eyespot |
For control of rust, gray leaf spot, northern corn leaf blight and northern corn leaf spot on field, pop and sweet corn (includes seed production).
For gray leaf spot, apply Quadris at the onset of disease. A second application may be required 14 days later if disease pressure persists. For all other diseases, Quadris applications should begin prior to disease development and may continue throughout the season every 7 to 14 days following resistance management guidelines (see label). An adjuvant may be added at recommended rates.
Resistance management: Follow the resistance management guidelines in the general use precaution section of the Quadris label.
Do not apply more than 3.75 qt of product per crop per acre per season.
Do not apply within 7 days of harvest. |
Quilt
Syngenta |
azoxystrobin |
7.00% |
7.0 to 14.0 fl oz per acre for northern corn leaf blight, northern corn leaf spot and southern corn leaf blight
10.5 to 14.0 fl oz per acre for rusts, gray leafspot and eye spot |
For leaf blights apply Quilt when disease first appears. Continue on a 7 to 14 day schedule. Use the low rate when disease pressure is low. Under heavy disease pressure or if conditions are favorable for disease apply the high rate.
Apply no more than 2 applications of Quilt or any other Group 11 fungicide per year.
Quilt may be applied by ground, air or chemigation.
Do not apply to field corn and field corn grown for seed after brown silk.
Do not apply within 30 days of harvest for forage.
Do not apply more than 56 fl oz per acre per season of Quilt. |
| propiconazole |
11.70% |
Stratego
Bayer CropScience |
propiconazole |
11.40% |
7.0-10.0 fl oz per acre for rust (Puccinia sorghi)
10.0-12.0 fl oz per acre for eye spot, gray leaf spot or Helminthosporium leaf blights |
Applications may be made to corn between the V4 (4-leaf) to after silking growth stages.
Apply when disease first appears and continue on a 7 to 14 day interval if favorable conditions for disease development persist.
Use the higher rates and shorter intervals when disease pressure is severe.
Do not apply Stratego to field corn and field corn grown for seed after silking.
Do not apply more than 24 fl oz of Stratego per acre per crop. Do not apply more than 2 sequential applications of Stratego. Limit the number of Stratego or other (Group 11) -containing fungicide application to no more than 2 per acre per crop.
Do not graze or harvest for forage within 30 days of application. |
| trifloxystrobin |
11.40% |
Tilt
Syngenta |
propiconazole |
41.80% |
2.0 to 4.0 fl oz per acre |
For control of Helminthosporium leaf blights (Helminthosporium maydis, H. turcicum, and H. carbonum), rusts, gray leaf spot, and eye spot, apply Tilt according to the following schedule:
Helminthosporium leaf blights: apply 2.0 to 4.0 fl oz of Tilt per acre when disease first appears and continue on a 7 to 14 day schedule.
Rusts: apply 4.0 fl oz of Tilt per acre when rust pustules first appear and continue on a 7 to 14 day schedule.
Gray leaf spot and eye spot: apply 4.0 fl oz of Tilt per acre when disease first appears. If conditions favorable for disease persist, continue to apply on a 14 day schedule.
Do not apply Tilt to field corn and field corn grown for seed after silking.
Do not apply more than 16 fl oz of Tilt per acre per season.
Do not harvest field corn, field corn grown for seed or popcorn for forage within 30 days of last application. |
