Publication 360, Fruit Production Recommendations:
Pear Calendar - Special sprays (when monitoring indicates the need about mid-Aug. and early Sept.)

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

1. Special sprays (when monitoring indicates the need about mid-Aug. and early Sept.)
   • Codling moth (second generation)
   • Oriental fruit moth
   • Precautions
2. Other Pear Calendar Sections
   • Dormant
   • Green tip
   • White bud (white petals showing on flowers)
   • Bloom
   • 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
   • 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

Codling moth (second generation) (Special sprays)

• Materials: Use one of
  
  • Assail 70 WP @ 170 g/ha
  • Altacor 215 g/ha @ 215 g/ha
  • Delegate WG @ 420 g/ha
  • Imidan 50 WP @ 3.75 kg/ha
  • Guthion 50 WSB - see label
    or Sniper - see label
• Comments: Codling moth can infest pear as maturation and ripening begins. Bosc pears can be heavily infested and may require two preharvest sprays about 2 weeks apart.
  Timing is critical for effective control. Use pheromone traps to time sprays. For second generation codling moth, spray at 611 to 694 DDC (base 10°C) after first generation sustained moth catch.
  See Degree-day modelling and determining a biofix.
  Assail: Apply 1-2 days earlier than OP insecticides (639-667 DDC). Assail residues last 10-14 days. Do not apply as a border spray.
  Imidan, Guthion, Sniper: Apply at 667-694 DDC. Do not apply as a border spray.
  Delegate and Altacor: Apply at 667-694 DDC. Do not apply as a border spray.

Oriental fruit moth (Special sprays)

• Materials: Use one of
  • Decis 5 EC @ 250 mL/ha
  • Assail 70 WP @ 240 g/ha
  • Altacor 215 g/ha
  • Delegate WG @ 420 g/ha
• Comments: For Bosc, d'Anjou and Bartlett a spray 7-10 days prior to harvest is recommended in orchards adjacent to or near peaches.
  Altacor and Delegate: Apply at first egg hatch, 50-100 degree days C (base 7.2°C) after biofix (first sustained moth catch). See Degree-day modelling and determining a biofix. Monitor populations and reapply 10-14 days later if required. Comply with the 14 days to harvest interval.
  For resistance management, if more than one spray is required for this generation, use a product from the same chemical group. For subsequent generations rotate to another chemical group.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Oriental fruit moth

  
  

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