Publication 360, Guide to Fruit Production:
Apricot Calendar - Petal fall

Pub 360, Guide to Fruit Production > Chapter 7: Tender Fruit > Apricot Calendar > Petal Fall

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Excerpt from Publication 360, Guide to Fruit Production 2012-13,
Order this publication

 

Table of Contents

1. Petal Fall
   • Brown rot
   • Oriental fruit moth
   • Precautions
2. Other Apricot Calendar Sections
• Dormant (in late March or early April before buds swell)
• Bloom
• Shuck split (when about 50% of shucks have split)
• 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
   • Tender Fruit Nutrition
   • Notes on Tender Fruit Insects & Diseases
   • Table 7-5. Products Used on Apricots
   • Table 7-11. Activity of Fungicides on Stone Fruit Diseases
   • Table 7-12. Activity of Insecticides and Miticides on Tender Fruit Pests
4. Apricot Calendar (PDF 54 KB)
5. Chapter 7 - Tender Fruit Calendar (PDF 40 KB)
6. Related Links

 

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Brown rot (Petal fall)

• Materials: Use one of:
  • Rovral @ 1.5 kg/ha
  • Topas @ 500 mL/ha
    or Jade @ 500 mL/ha
    or Mission 418 EC @ 300 mL/ha
  • Indar 75 WSP @ 140 g/ha
  • Vangard 75 WG @ 370 g/ha
  • Lance WDG @ 370 g/ha
    or Cantus WDG @ 370 g/ha
    
  • Pristine WG @ 750 g/ha
  • Supra Captan 80 WDG @ 4.5 kg/ha
    or Maestro 80 DF @ 4.5 kg/ha
• Comments: Apricots are extremely susceptible to brown rot. Spray when first blossoms open. If wet weather occurs repeat spray at 50% bloom and at full bloom. To avoid resistance, alternate among fungicide groups and do not use products from the same group in consecutive sprays.
  Rovral, Topas, Jade, Mission, Indar, Vangard, Lance, Cantus, Pristine: To manage resistance for each of these fungicides, rotate to a different fungicide group for each spray. Do not apply to sporulating lesions. See Managing resistance to fungicides, and Table 12-2. Fungicide/Bactericide Groups Based on Sites of Action. These products are locally systemic. Consult labels for information on drying time required before rain.
  Topas, Mission, Jade, Indar: Do not rotate Topas, Mission, Jade and Indar.
  Pristine, Lance, Cantus: Do not rotate Pristine with Lance or Cantus.
  
• Learn more
  • Notes on Tender Fruit Insects & Diseases
  • Brown rot

 

Oriental fruit moth(Petal fall)

• Materials: Use one of:
  • Isomate-M Rosso at 500 dispensers/ha
  • Isomate-M 100 at 250 dispensers/ha
• Comments: Pheromone mating disruption products are not insecticides and will not control other pests that may be present. Use mating disruption only if initial OFM population is low. Apply to square or rectangular orchard blocks at least 4 ha in size. This technology may be used in apricot orchards that are less than 4 ha but are adjacent to orchards of sufficient size, if both are using this technology. Apply dispensers before OFM flight begins. For more information see Using mating disruption to control oriental fruit moth (Isomate-M Rosso and Isomate-M 100), and OMAFRA Factsheet Mating Disruption for Management of Oriental Fruit Moth in Stone and Pome Fruit, Order No. 04-029.
  Isomate-M 100: Make a second application 75-80 days after initial application if necessary.
  Isomate-M Rosso: Provides mating disruption for up to 120 days.
  If desired, use both an insecticide and mating disruption for managing first generation OFM (see Shuck split).
  
• Learn more
  • Notes on Tender Fruit Insects & Diseases
  • Oriental fruit moth

 

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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.

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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