Publication 360, Fruit Production Recommendations:
Pear Calendar - Bloom

Excerpt from Publication 360, Fruit Production Recommendations 2010-11,
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Table of Contents

1. Bloom
• Fireblight
• Scab
• Precautions
2. Other Pear Calendar Sections
• Dormant
• Green tip
• White bud (white petals showing on flowers)
• Petal fall
• Special spray (when monitoring indicates the need at Petal fall)
• First cover
• Special spray (when monitoring indicates the need at First cover)
• Summer sprays
• Second cover
• Special sprays (when monitoring indicates the need about mid-Aug. and early Sept.)
• Postharvest fruit treatment
3. Other Information on Pears
   • Thinning pears
   • Notes on Tender Fruit Insects & Diseases
   • Table 7-9. Products Used on Pears
   • Table 7-11. Activity of Fungicides on Stone Fruit Diseases
   • Tender Fruit Nutrition
4. Pear Calendar PDF 130 KB
5. Chapter 7 - Tender Fruit Calendar PDF 401KB
6. Related Links

There are special pollination requirements for pears.
See Pollination Requirements for Fruit Crops.

Do not apply insecticides while pears are in bloom.
See Bee Poisoning.

Fireblight (Bloom)

• Materials: Use one of:
  • Streptomycin 17 @ 600 g/ 1,000
  • Serenade MAX@ 3.0 -6.0 kg/ha
• Comments: Sprays are most effective when applied dilute (high volumes of water) prior to a wetting period. Use alone for best results. Because Streptomycin 17 is UV light sensitive, it is effective for only 2-3 days. If warm, wet conditions (above 20°C) prevail, two to three sprays during bloom may be required for fire blight control. To avoid resistance, use a maximum of three sprays per season. For more information, refer to OMAFRA Infosheet on Fire blight.
  Serenade MAX: Provides suppression rather than control of fire blight. See Table 2-6. Efficacy Ratings for Pesticides, and notes on Bacillus subtilis (Serenade ASO, Serenade MAX).
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Fire blight

Scab (Bloom)

• Materials: Use one of:
  • Flint 50 WG @ 140 g/ha
    
  • Sovran @ 240 g/ha
    
  • Pristine WG @ 1.0-1.2 kg/ha
  • Equal 65 WP @ 3.25 kg/ha
  • Supra Captan 80 WDG @ 3.75 kg/ha
    or Maestro 80 DF @ 3.75 kg/ha
  • Dikar @ 6.75 kg/ha
  • Scala SC @ 1.0 L/ha
  • Serenade MAX @ 3.0-6.0 kg/ha
• Comments:Sovran, Flint and Pristine: No more than two consecutive applications, then rotate to a different group. Do not rotate within this group. Where disease pressure is high, use up to 360 g/ha of Sovran.
  Captan or Maestro: Do not use on d'Anjou pears.
  Dikar: If used at 10 day intervals, controls pear scab and pear psylla nymphs. It also suppresses European red mite and rust mite populations. Do not use Dikar within 45 days of harvest. Higher water volumes aid in mite suppression.
  Scala: Do not apply postbloom.
  Serenade MAX: Provides suppression rather than control of pear scab. See Table 2-6. Efficacy Ratings for Pesticides, and notes on Bacillus subtilis (Serenade ASO, Serenade MAX).
  
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Pear scab

Precautions

Read the product label and follow all safety precautions.

Consult the product label for suggested water volumes. Otherwise, use enough water to ensure thorough spray coverage. Where the product rate is listed in amount per 1,000 L and if a water volume is not provided on the label, use enough water to wet the foliage to the near drip point.

Products are listed by fungicide and insecticide group. Use products from different groups to prevent pest resistance. For resistance management, refer to Pest Resistance to Insecticides, Fungicides, Miticides.

For preharvest interval, re-entry period, maximum number of applications and chemical group, see Table 7-9. Products Used on Pears.

Related Links

• Integrated Pest Management (IPM)
• Pesticide Application and Safety
• Pesticide Companies and Agents
• Search the PMRA website
• Ontario Minor Use Program
• OMAFRA Publication 505: Ontario Weeds
• OMAFRA Publication 360: Fruit Production Recommendations