Cereals: Wheat: Loose Smut (Ustilago tritici)


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

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

Table of Contents

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

Integrated Pest Management Options

Seed Treatment

This fungus infects the embryo at flowering, thus it is seed-borne. Light rains or heavy dew and moderate temperature, 15°C-16°C (58°F-60°F) during flowering, favour infection. Sow pedigree seed that is treated with a fungicide seed treatment. This disease was quite important in Ontario wheat production, but the incidence and hence its impact has been reduced substantially due to the effectiveness of fungicide seed treatments. Good coverage of seed with fungicide seed treatment is important.

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

 

 
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-M
Trade name Raxil MD
Rate (product) 300 mL per 100 kg seed
Comments Do not graze or feed livestock on treated areas for 4 weeks after planting.

 

 
Active ingredient difenoconazole + metalaxyl-M
Trade name Dividend XL RTA
Rate (product) 325-650 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. Do not graze, feed green forage or cut for hay within 55 days of 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. Avoid late seeding of winter cereals. Do not graze or feed livestock on treated areas for 40 days 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 mL per 100 kg seed
Comments 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: 16 May 2011