Dry Edible Beans: White Mold (Sclerotinia sclerotiorum)

Excerpt from Chapter 7, Field Crop Protection Guide, Order this publication

Table of Contents

1. Integrated Pest Management Options
   • vinclozolin – Ronilan EG (1 Application)
   • vinclozolin – Ronilan EG (2 Applications)
   • boscalid – Lance
   • iprodione – Rovral WP
   • thiophanate-methyl – Senator 70 WP
   • dicloran – Botran 75 WP
2. Related links...

Integrated Pest Management Options

Avoid soybeans, canola and other hosts in a 3-yr rotation, since these crops are susceptible to white mould. Rotate with non-host crops such as wheat, corn and barley. In fields with a history of the disease, select varieties with an upright structure. Lower plant populations and increased row width promote rapid drying of the plants and soil surface and therefore reduce potential for infection. Avoid excess fertilization. Those fields at risk have a past history of white mould and above-average foliage growth. .

CAUTION: Before treating with Ronilan (vinclozolin), check with your dealer or buyer concerning possible foreign import restrictions on Ronilan-treated edible beans.

Comments
See Caution note under IPM Options, left. Apply at 30%-50% flowering with repeat application 7-14 days later at full bloom if disease persists. For one application, apply 1.5 kg at early to mid-bloom (30%-50%). Do not feed treated bean refuse to livestock. Use sufficient water to ensure thorough coverage of plant foliage. Tank-mixing with insecticide is not recommended, as this fungicide could affect insecticide efficacy. Do not apply with products containing boron. 45 days to harvest for common, adzuki and mung beans.

Comments
Best used as a preventative measure. Ground or aerial application. Apply at 20%-50% flowering. Apply a second time 7-10 days later up to 50% flowering if disease persists or weather conditions are favourable for disease development. Tank-mixing with insecticide is not recommended, as this fungicide could affect insecticide efficacy. Tank-mixing with Headline is not recommended, as precipitates can develop. Plantback interval of 14 days for crops not on label. 21 days to harvest.

Comments
Apply at 25%-75% bloom. 12-hr re-entry period. Do not feed treated bean refuse to livestock.

Comments
Apply when conditions favouring development of disease exist (warm, humid weather combined with heavy, dense crop foliage). Do not feed treated bean refuse to livestock. 14 days to harvest.

Comments
Begin application when disease is anticipated, usually close to full bloom. Do not feed treated bean refuse to livestock. 2 days to harvest.

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Related links...

• Agronomy Guide for Field Crops - Publication 811
  • Dry Edible Beans: White Mould (Sclerotinia)
• Insects
• Dry Edible Beans

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