Dry Edible Beans: Anthracnose (Colletotrichum lindemuthianum)

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

Table of Contents

1. Integrated Pest Management Options
   • Seed Treatment
     • diazinon + captan + thiophanate-methyl – DCT
     • azoxystrobin - Dynasty 100FS
   • Foliar Treatment
   • azoxystrobin - Quadris
   • pyraclostrobin – Headline EC
2. Related Links...

Integrated Pest Management Options

Anthracnose is best controlled by planting disease-free seed and using a seed treatment containing DCT or Dynasty 100FS. Should disease still appear, use a foliar fungicide as a rescue treatment.

Seed Treatment

Comments
Due to the threat of anthracnose infection to this crop, ALL edible bean seed should be treated with DCT or Dynasty 100FS. Available in a 400-g container that will treat 77 kg of dry bean seed. To make slurry, use 520 g seed treatment/L of water. Use full rate and ensure good coverage by applying as a slurry. For control of pythium and phytophthora root rots, add metalaxyl.

Comments
Due to the threat of anthracnose infection to this crop, ALL edible bean seed should be treated with DCT or Dynasty 100FS. One application as a seed treatment. For additional disease control, use in combination with Apron Maxx RFC or Cruiser Maxx Beans.

Foliar Treatment

Rainy weather favours this disease, as spores are splashed from diseased areas and carried in wind-borne water droplets or by surface water throughout the field. Wet conditions over a prolonged period of time can result in epidemics, therefore take note of weather forecasts. Timing of foliar fungicides is important.

Comments
Ground and aerial application. Apply 1^st application at early flower or when disease first appears. If necessary, re-apply 10-14 days later if disease persists. Maximum of 2 applications/season. 15 days to harvest.

Comments
Ground and aerial application. Apply when disease first appears. If necessary, re-apply 10-14 days later if disease persists. Tank-mixing with insecticide is not recommended, as this fungicide could affect insecticide efficacy. Tank-mixing with Lance is not recommended, as precipitates can develop. To minimize risk of precipitates forming, use water >10°C and spray solution promptly. Maximum of 2 applications/season. 30 days to harvest.

Related Links...

• Agronomy Guide for Field Crops - Publication 811
  • Dry Edible Beans: Anthracnose
• Diseases
• Dry Edible Beans