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Corn: Helminthosporium Leaf Spot (Cochliobolus carbonum)

Author: OMAFRA Staff
Creation Date: 04 July 2005
Last Reviewed: 28 July 2007
Pub 812: Field Crop Protection Guide > Chapter 2 : Corn > Helminthosporium Leaf Spot

Excerpt from Chapter 2, Field Crop Protection Guide, Order this publication

Table of Contents

  1. Integrated Pest Management Options
  2. Related links...

Integrated Pest Management Options

Not generally a problem in Ontario since resistant hybrids are available. Crop rotation and tillage will reduce inoculum levels in surface residues. In reduced tillage systems, rotation and resistance are necessary. Chemical control not usually economical in field corn.

  Tilt 250 E Bumper 418 EC
propiconazole – Tilt 250 E, Bumper 418 EC
Active ingredient propiconazole propiconazole
Trade name Tilt 250 E Bumper 418 EC
Rate per hectare (product) 250-500 mL per ha 150-300 mL per ha
Rate per acre (product) 100-200 mL per ac 60-121 mL per ac

Comments
Ground and aerial application. Apply when disease first appears. Can be tank mixed with Ripcord or Matador insecticide for insect and disease control. 14 days to harvest.

 

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