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Cereals: Barley: Scald (Rhynchosporium secalis)

Author: OMAFRA Staff
Creation Date: 04 July 2005
Last Reviewed: 15 June 2009
Pub 812: Field Crop Protection Guide > Chapter 4: Cereals > Barley: Scald

Excerpt from Chapter 4, 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.

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 (Days to harvest, label precautions, etc.)
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/season. Tank-mixing with insecticide is not recommended, as this fungicide could affect insecticide efficacy.

azoxystrobin + propiconazole - Quilt

Active ingredient azoxystrobin + propiconazole
Trade name Quilt
Rate per hectare (product) 750 mL per ha
Rate per acre (product) 305 mL per ac

Comments (Days to harvest, label precautions, etc.)
Ground and aerial application. Apply once between stem elongation (Zadok’s 29–37) and half-head emergence (Zadok’s 49–55). Maximum 1 application/season. 45 days to harvest for grain or straw. Do not harvest for forage. When expecting high disease pressure from stripe rust, use the higher application rate of 1 L/ha.

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 (Days to harvest, label precautions, etc.)
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.

prothioconazole - Proline

Active ingredient prothioconazole
Trade name Proline
Rate per hectare (product) 210–315 mL per ha
Rate per acre (product) 85–128 mL per ac

Comments (Days to harvest, label precautions, etc.)
Ground application only. Use as a preventative 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. Do not apply within 30 days of harvest.

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 (Days to harvest, label precautions, etc.)
Spring barley. Ground and aerial application. Maximum 2 applications/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.

Related links...

 

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