Publication 360, Fruit Production Recommendations:
Apricot Calendar - Shuck split (when about 50% of shucks have split)

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

1. Shuck split (when about 50% of shucks have split)
   • Brown rot
   • Oriental fruit moth
   • Plum curculio
   • Precautions
2. Other Apricot Calendar Sections
• Dormant (in late March or early April before buds swell)
• Bloom
• Petal fall
• Shuck fall (10-12 days after last spray)
• First cover (10-12 days after Shuck fall)
• Special sprays (when monitoring indicates the need)
• Prepick to harvest
• Postharvest fruit treatment
3. Other Information of Apricots
   • Notes on Tender Fruit Insects & Diseases
   • Table 7-5. Products Used on Apricots
   • Table 7-11. Activity of Fungicides on Stone Fruit Diseases
   • Tender Fruit Nutrition
4. Apricot Calendar PDF 100 KB
5. Chapter 7 - Tender Fruit Calendar PDF 401 KB
6. Related Links

Brown rot (Shuck split)

• Materials: Use one of:
  • Topas 250 E @ 500 mL/ha
    or Mission 418 EC @ 300 mL/ha
  • Indar 75 WSP @ 140 g/ha
  • Rovral @ 1.5 kg/ha
  • Vangard @ 370 g/ha
  • Lance WDG @ 370 g/ha
  • Pristine WG @ 750 g/ha
  • SupraCaptan 80 WDG @ 4.5 kg/ha
    or Maestro 80 DF @ 4.5 kg/ha
• Comments:Apricots are extremely susceptible to brown rot. To avoid resistance, alternate among fungicide groups and do not use products from the same group in consecutive sprays.
  Topas, Mission and Indar: Do not alternate Topas, Mission and Indar. Use one of these products and then alternate to another group.
  Pristine and Lance: Do not alternate Pristine with Lance. Use one of these products and then alternate to another group.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
  • Brown rot
    

Oriental fruit moth(Shuck split)

• Materials: Use one of:
  • Assail 70 WP at 120-240 g/ha
  • Altacor at 285 g/ha
  • Delegate WG at 420 g/ha
• Comments:Assail: For optimum activity, use the 240 g/ha rate. Apply in a minimum spray volume of 1,000 L/ha. Do not apply more than once every 12 days. Also controls plum curculio.
  Altacor and Delegate: Apply at first egg hatch, 50-100 degree days C (base 7.2°C) after biofix (first sustained moth catch). Monitor populations and reapply 10-14 days later if required.
  Altacor: Do not exceed 645 g/ha per year.
  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 group.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
  • Oriental fruit moth

Plum curculio (Shuck split)

• Materials: Use one of:
  • Assail 70 WP at 240 g/ha
  • Guthion 50 WSB or Sniper. See label.
  • Sevin XLR @ 6.25 L/ha
• Comments:Apricots are very susceptible to plum curculio. Scout edges of orchards near woodlots and wild hosts in spring. Check small fruit for crescent-shaped egg laying scars. Damage often occurs only on the border of the orchard. Check developing fruit for new damage 7-10 days after insecticide is applied.
  Assail: Under high insect pressure, the level of damage reduction may be limited to suppression rather than control.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
  • Plum curculio

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 7-5. Products Used on Apricots.

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 75: Guide To Weed Control
• OMAFRA Publication 360: Fruit Production Recommendations