Cereals: Barley: Rust (Leaf - Puccinia hordei, Stem - Puccinia graminis f. sp. tritici)


Pub 812: Field Crop Protection Guide > Chapter 4: Cereals > Barley: Rust (Leaf and Stem)

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

Table of Contents

  1. Foliar, Stem and Head Diseases
      • tebuconazole - Folicur 250 EW, Folicur 432 F
      • prothioconazole + tebuconazole - Prosaro 250 EC
      • azoxystrobin + propiconazole - Quilt
      • propiconazole – Tilt 250 E, Bumper 418 EC
  2. Related links...

Foliar, Stem and Head Diseases

Leaf rust spores are blown in from the south, and in most years, late-planted fields are most likely to show the disease. The alternate host is barberry. Remove or destroy alternate host from fence rows, etc. Plant early to reduce risk of disease incidence.

 

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 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 azoxystrobin + propiconazole
Trade name Quilt
Rate per hectare (product) 1.0 L per ha
Rate per acre (product) 406 mL per ac
PHI* Do not apply at boot stage or 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. Use higher application rate of 1 L/ha when expecting high disease pressure from stripe rust and wheat leaf rust. Maximum 1 application/yr. Do not harvest for forage. 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 tillering head half emerged.

 

 
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.


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