Publication 360, Fruit Production Recommendations:
Plum Calendar - Special sprays (when monitoring indicates the need)

Table of Contents

1. Special sprays (when monitoring indicates the need)
   • Aphids
   • Apple maggot
   • Peachtree borer, Lesser peachtree borer
   • Obliquebanded leafroller
   • Precautions
2. Other Plum Calendar Sections
• Dormant (before bud break)
• Green tip (just as buds are bursting)
• Popcorn (when blossoms show white)
• Bloom
• Shuck (when most of the shucks are off)
• First cover (12 days after Shuck)
• Second cover
• Prepick
• Postharvest fruit treatment
3. Other Information on Plums
   • Notes on Tender Fruit Insects & Diseases
   • Table 7-10. Products Used on Plums
   • Table 7-11. Activity of Fungicides on Stone Fruit Diseases
4. Plum Calendar (PDF 64 KB)
5. Chapter 7 - Tender Fruit Calendar PDF 335 KB
6. Related Links

 

Aphids (Special sprays)

• Materials: Use one of:
  • Movento 240 SC @ 365 mL/ha
  • Thionex 50 W @ 3.25 kg/ha
  • Diazinon 50 W @ 3.0 kg
• Comments:Apply only if aphids are a problem. Very thorough coverage and calm warm conditions are needed for good control.
  Movento: Most effective on young stages of aphids. Has slow activity; control may not be apparent for 2-3 weeks. Under high pressure a second application may be necessary 2 weeks later. See the Movento label for additional details. Do not tank-mix with sulfur.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Aphids

Apple maggot (Special sprays)

• Materials: Use one of:
  • Diazinon 50 W @ 3.0 kg/ha
  • Imidan 50 WP @ 3.75 kg
• Comments: If apple maggot has been a problem on blue plums and prunes, apply 2-3 sprays during July and August.
• Learn more:
  • Notes on Apple Insects & Diseases
    • Apple maggot

Peachtree borer, Lesser peachtree borer (Special sprays)

• Materials: Use one of:
  • Thiodan 4 EC @ 1.75 L/ 1,000 L
  • Sevin XLR @ 6.25 L/ha
• Comments: Apply 3 sprays, three weeks apart. Apply first spray 10 days after first adult catch in pheromone traps. Direct these sprays with a handgun to cover trunk and scaffold limbs thoroughly. Check preharvest intervals and do not spray if fruit is to be harvested during this period.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Peach tree borers

Obliquebanded leafroller (Special sprays)

• Materials: Use one of:
  • Success 480 SC @ 182 mL/ha
    or Entrust 80 W @ 109 g/ha
  • Delegate WG @ 420 g/ha
  • Altacor @ 285 g/ha
• Comments: For OBLR summer generations, apply at 240-280 degree days C (base 6.1°C) after biofix (first sustained moth catch). Comply with the 14 days to harvest interval.
  Altacor: Do not exceed 645 g/ha per year.
• Learn more:
  • Notes on Tender Fruit Insects & Diseases
    • Obliquebanded leafroller
      

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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 7-10. Products Used on Plums.

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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 360: Fruit Production Recommendations