Publication 360, Fruit Production Recommendations: Apple Calendar - Late Bloom/Early Petal Fall

Table of Contents

1. Fire Blight
2. Precautions
3. Learn more
4. Other Apple Calendar sections
   • Dormant
   • Green tip
   • Half-inch green to tight cluster
   • Tight cluster to pink
   • Pink
   • Bloom
   • 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
5. Other Information on Apples
   • Apple Growth Stages
   • Apple Nutrition
   • Guidelines for Protecting Non-Bearing Apple Plantings
   • Notes on Apple Diseases
   • Thinning and Plant Growth Regulators
   • Table 4-7. Products Used on Apples
6. Chapter 4: Apple Calendar - PDF 357 kb
7. Related Links

Fire blight (Late Bloom/Early Petal Fall)

• Materials: Apogee @ 1.35 kg/ha
  • Comments: Apogee reduces vegetative growth, making trees less susceptible to fire blight infections of shoots. Apogee has no impact on blossom blight or the fire blight bacteria. Apply in late bloom or early petal fall when shoots are 2.5-5.5 cm long. Accurate timing is critical. Apogee will help suppress fire blight infections from this point on. Re-apply spray 14-21 days later. In plantings with low vigour, a reduction in shoot growth caused by the high rate of Apogee for fire blight suppression may be undesirable. For more information on the use of Apogee refer to Vegetative Growth Control in Apples.
• For more information - Ontario CropIPM: Fire blight

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.

For information on identifying pests and monitoring apple orchards, refer to OMAFRA Publication 310, Integrated Pest Management for Apples.

Products are listed according to insecticide and fungicide group. Use products from different groups to prevent the development of 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 4-7. Products Used on Apples.

Learn more:

• Notes on Apple Diseases
  • Fire blight

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