Cereals: Barley: Loose Smut (Ustilago nuda)


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

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

Table of Contents

  1. Integrated Pest Management Options
      • tebuconazole + thiram– Raxil T
      • tebuconazole + metalaxyl - Raxil MD
      • triadimenol – Baytan 30
      • carbathiin + thiram – Vitaflo 280
      • triticonazole + thiram – Gemini
      • ipconazole - Rancona Apex
  2. Related links...

Integrated Pest Management Options

Seed Treatment

Infection occurs during flowering. Conditions that promote the disease are wet, cloudy weather and moderate temperatures 16°C-22°C (60°F-72°F). Sow pedigree seed to ensure that seed is not infected. Moist weather at flowering promotes this disease. Disease incidence has been increasing in Ontario where no seed treatments are beneficial in reducing loose smut infection.

 
Active ingredient tebuconazole + thiram
Trade name Raxil T
Rate (product) 225 mL per 100 kg seed
Comments Do not graze or feed livestock on treated areas for 4 weeks after planting.

 

 
Active ingredient tebuconazole + metalaxyl
Trade name Raxil MD
Rate (product) 300 mL per 100 kg seed
Comments For both commercial seed treatment plants and on-farm treatment with conventional seed treating equipment that can accurately control application rates and provides good distribution of chemical onto the seed in the mixing chamber. Uniform application is necessary to ensure seed safety and best disease control. Do not graze or feed livestock on treated areas for 4 weeks after planting.

 
Active ingredient triadimenol
Trade name Baytan 30
Rate (product) 50 mL per 100 kg seed
Comments Must be diluted with water prior to treatment of seed to ensure uniform coverage. Treated seed will sometimes emerge more slowly than untreated seed. Avoid late seeding of winter cereals. Do not graze or feed livestock on treated areas for 40 days after planting.

 

 
Active ingredient carbathiin + thiram
Trade name Vitaflo 280
Rate (product) 230-330 mL per 100 kg seed
Comments Do not graze or feed livestock on treated areas for 6 weeks after planting.

 
Active ingredient triticonazole + thiram
Trade name Gemini
Rate (product) 360 mL per 100 kg seed
Comments For both commercial seed treatment plants and on-farm treatment using standard gravity flow- or mist-type seed treatment equipment. May also be used in treat-on-the-go seeder.

 

 
Active ingredient ipconazole
Trade name Rancona Apex
Rate (product) 325-433 mL per 100 kg seed
Comments Use higher rate for highly infected seed lots only. Do not graze or feed livestock on treated areas for 30 days after planting.

 


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