Cereals: Barley: Scald (Rhynchosporium secalis)


Pub 812: Field Crop Protection Guide > Chapter 4: Cereals > Barley: Scald

Field Crop Protection Guide 2011-2012, Order 2011-2012 publication

Table of Contents

  1. Foliar, Stem and Head Diseases
      • pyraclostrobin – Headline EC
      • azoxystrobin + propiconazole - Quilt
      • prothioconazole + tebuconazole - Prosaro 250 EC
      • tebuconazole - Folicur 250 EW, Folicur 132 F
      • propiconazole – Tilt 250 E, Bumper 418 EC
      • prothioconazole - Proline 480 SC
      • trifloxystrobin + propiconazole – Stratego 250 EC
  2. Related links...

Foliar, Stem and Head Diseases

Avoid growing barley after barley, wheat or grasses in a rotation. Plow-down stubble and straw and plant early to avoid serious disease in July.

Active ingredient pyraclostrobin
Trade name Headline EC
Rate per hectare (product) 400-600 mL per ha
Rate per acre (product) 160-240 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. Maximum 2 applications/yr. 12-hr re-entry period.

 

Active ingredient azoxystrobin + propiconazole
Trade name Quilt
Rate per hectare (product) 750 mL per ha
Rate per acre (product) 305 mL per ac
PHI* Do not apply at boot stage and beyond.
Comments Ground and aerial application. Do not apply at boot stage and beyond. Maximum 1 application/yr. Do not harvest for forage. 12-hr re-entry period.

 

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 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 at the very early stages of disease development. Use higher rate when disease pressure is severe. 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 at the very early stages of disease development. Use higher rate when disease pressure is severe. 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 per year and has been traditionally used for Fusarium control, where applications are targeted at head emergence.

 

 
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 tillering head half emerged. Can be tank-mixed with several cereal herbicides.

 

 
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 For use in spring barley only. 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). Maximum 2 applications/yr.


Active ingredient prothioconazole
Trade name Proline 480 SC
Rate per hectare (product) 210–315 mL per ha
Rate per acre (product) 85–128 mL per ac
PHI* 30
Comments Ground application only. Use as a preventative treatment 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. Maximum 2 applications/yr with a minimum 7-day interval between applications. 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 For use in spring barley only. 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. Maximum 2 applications/yr. 12-hr re-entry period.

 


Related links...

 


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 2 May 2011
Last Reviewed: 17 May 2011