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Cereals: Barley: Spot Blotch (Cochliobolus sativus)

Author: OMAFRA Staff
Creation Date: 04 July 2005
Last Reviewed: 28 July 2007
Pub 812: Field Crop Protection Guide > Chapter 5: Cereals > Barley: Spot Blotch

Excerpt from Chapter 5, Field Crop Protection Guide, Order this publication

Table of Contents

  1. Foliar, Stem and Head Diseases
  2. Related links...

Foliar, Stem and Head Diseases

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

propiconazole – Tilt 250 E, Bumper 418 EC
Active ingredient propiconazole propiconazole
Trade name Tilt 250 E Bumper 418 EC
Rate per hectare (product) 500 mL per ha 300 mL per ha
Rate per acre (product) 200 mL per ac 121 mL per ac

Comments
Ground and aerial application. Apply at early signs of disease from tillering to head half emerged. Can be tank-mixed with several cereal herbicides. 45 days to harvest.

pyraclostrobin – Headline EC
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

Comments
Ground or aerial. 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 per season. Tank-mixing with insecticide is not recommended, as this fungicide could affect insecticide efficacy.

trifloxystrobin + propiconazole – Stratego 250 EC
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

Comments
Spring barley. Ground and aerial application. Maximum of 2 applications per year. 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. 45 days to harvest.

 

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