Publication 360, Fruit Production Recommendations:
Guidelines for Protection of Non-bearing Apple Plantings

Pub 360, Fruit Production Recommendations > Apples > Apple Calendar > Guidelines for Protecting Non-Bearing Apple Plantings

Table of Contents

1. Early Spring
• Phytophthora Collar Rot
2. First Spray
• Powdery Mildew
• Scab
3. Prebloom
• Tentiform Leafminer
• Leaf-feeding Caterpillars
4. Bloom
• Fire Blight
5. Post-bloom
• Leaf Curling Midge
6. Summer Sprays
• Leaf-feeding Insects
• Aphids
• White Apple Leafhopper
• Potato Leafhopper
• Tentiform Leafminer
• Mites
• Buffalo Treehopper
• Phytophthora Collar Rot
• Root lesion nematode
7. Precautions (PDF 75 kb)
8. Other Apple Calendar sections
   • Dormant
   • Green tip
   • Half-inch green to tight cluster
   • Tight cluster to pink
   • Pink
   • Bloom
   • Late Bloom/Early Petal Fall
   • Petal fall (Calyx) when most petals have fallen
   • First summer spray (7-10 days after Calyx)
   • Subsequent summer sprays
   • Special summer sprays
   • Preharvest sprays
   • Postharvest treatment
9. Other Information on Apples
   • Apple Growth Stages
   • Apple Nutrition
   • Notes on Apple Diseases
   • Thinning and Plant Growth Regulators
   • Table 4-7. Products Used on Apples
10. Chapter 4: Apple Calendar - PDF 357 kb
11. Related Links

 

Phytophthora collar rot (Early Spring)

• Materials: Ridomil Gold 480 SL
• For more information - Ontario CropIPM: Phytophthora collar rot

 

 

 

Powdery mildew (First Spray)

Biopesticides are available for powdery mildew suppression. See Table 2-6. Efficacy Ratings for Pesticides, and Bacillus subtilis (Serenade ASO, Serenade MAX).

• Materials: Use one of:
  • Nova 40 W
  • Nustar
    
  • Sovran
  •  Flint 50 WG
  • Pristine WG
    
  • Dikar
• For more information - Ontario CropIPM: Powdery mildew

Scab (First Spray)

When green tissue shows. Repeat at 7-10 day intervals if wet weather occurs until late June. Biopesticides are available for apple scab suppression and fire blight suppression. See Table 2-6. Efficacy Ratings for Pesticides, and Bacillus subtilis (Serenade ASO, Serenade MAX).

• Materials: Use one of:
  • Dikar
  • Manzate Pro-stick or Dithane DG or Penncozeb 75 DF
  • Polyram DF
    
  • Supra Captan 80 WDG or Maestro 80 DF
    
  • Pristine WG
• For more information - Ontario CropIPM: Apple Scab

Tentiform leafminer (Prebloom)

• Materials: Use one of:
  • Assail 70 WP
    
  • Actara 25 WG
  • Calypso 480 EC
    
  • Altacor
    
  • Confirm 240 F
  • Intrepid 240 F
    
  • Pounce or Perm-Up or Ambush 500 EC
  • Decis 5EC
  • Ripcord 400 EC or Up-Cyde 2.5 EC
  • Matador 120 EC or Silencer 120 EC
    • Comments: Pounce, Ambush, Perm-Up, Ripcord, Up-Cyde, Decis, Matador, Silencer (pyrethroids): Do not apply more than once per season. Highly toxic to beneficial insects and may lead to outbreaks of European red mite.

Leaf-feeding caterpillars (Prebloom)

Apply when caterpillars are small. Include with a fungicide spray. Not necessary if a pyrethroid was used for tentiform leafminer.

• Materials: Use one of:
  • Imidan 50 WP
  • Guthion 50 WSB or Sniper
  • Zolone Flo

Fire blight (Bloom)

Avoid over stimulating growth. Biopesticides are available for fire blight suppression. See Table 2-6. Efficacy Ratings for Pesticides, and Bacillus subtilis (Serenade ASO, Serenade MAX).

• Materials: Streptomycin 17
• For more information - Ontario CropIPM: Fire blight
  

 

Leaf curling midge (Post-bloom)

• Materials: Use one of:
• Ripcord 400 EC or Up-Cyde 2.5 EC
• For more information - Ontario CropIPM: Leaf curling midge

 

 

Leaf-feeding insects (Summer sprays)

This spray will also control potato leafhopper.

• Materials: Use one of:
  • Imidan 50 WP
  • Guthion 50 WSB or Sniper
  • Zolone Flo

Aphids (Summer sprays)

Spray if insects become abundant at any time.

• Materials: Use one of:
  • Admire 240 F or Alias 240 SC
  • Assail 70 WP
  • Actara 25 WG
    
  • Movento 240 SC
    
  • Thionex 50 W
    
  • Diazinon 50 W
• For more information - Ontario CropIPM: Aphids

 

White apple leafhopper (Summer sprays)

• Materials: Use one of:
  • Admire 240 F or Alias 240 SC
  • Assail 70 WP
  • Calypso 480 EC
    
  • Thionex 50 W
• For more information - Ontario CropIPM:White apple leafhopper

 

Potato leafhopper (Summer sprays)

• Materials: Use one of:
  • Assail 70 WP
  • Calypso 480 EC
    
  • Thionex 50 W
• For more information - Ontario CropIPM: Potato leafhopper

  

 

Tentiform leafminer (Summer sprays)

• Materials: Use one of:
  • Admire 240 F or Alias 240 SC
  • Assail 70 WP
  • Actara 25 WG
  • Calypso 480 EC
    
  • Altacor
    
  • Delegate WG
    
  • Vydate L
    • Comments: Vydate: Very toxic to applicator. Timing is critical. If mines are visible on underleaf surface, consult crop consultant.

Mites (Summer sprays)

Check foliage frequently for mite injury. Spray if more than 10 mites per leaf are observed or at first sign of leaf bronzing.

• Materials: Use one of:
  • Pyramite or Nexter
    
  • Acramite 50 WS
    
  • Envidor 240 SC
    
• Kanemite 15 SC
  
• Carzol SP
• For more information - Ontario CropIPM: Mites
• 

Buffalo treehopper (Summer sprays)

Follow clean cultivation practices or remove legumes from cover crop.

 

Phytophthora collar rot (Summer sprays)

• Materials: Ridomil Gold 480 SL
• For more information - Ontario CropIPM: Phytophthora collar rot

 

 

 

 

 

Root lesion nematode (Summer sprays)

See Nematodes, and Nematode suppression after planting.

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Precautions

The following program is designed to offer limited protection when needed for newly planted trees. It is not intended for protection of bearing orchards. To minimize pest pressure, remove neglected fruit trees in the area, and control weeds. Alternate materials are available as shown in the calendar for bearing fruits.

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Related Links

• Ontario AppleIPM
• Apples in Ontario
• 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: Tree Fruit