Publication 360, Fruit Production Recommendations:
Blueberry Calendar - Bud swell to pink bud

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

1. Bud swell to pink bud
   • Leaf tiers
   • Blueberry spanworm
   • Mummy berry
   • Precautions
2. Other Blueberry calendar sections
• Dormant (late winter)
• Early Spring, prior to bud break
• Green tip
• Pink bud
• First bloom
• Petal fall
• Green fruit
• Fruit ripening
3. Other Information of Blueberries
   • Blueberry Growth Stages
   • Blueberry Nutrition
   • Notes on Blueberry Insects and Diseases
   • Table 5-9. Products Used on Blueberries
   • Table 5-10. Activity of Fungicides on Blueberry Diseases
4. Blueberry Calendar PDF 190 KB
5. Pub 360 Chapter 5, Berry Crops - (PDF 364 kb)
6. Related Links

Leaf tiers (Bud swell to pink bud)

• Materials: Decis 5 EC @ 150 mL/ha
• Comments: Damage occurs very early in the season. If leaf tier was a problem in the past, spray at the bud cluster stage as flower buds begin to swell and pink tissue becomes visible.

Blueberry spanworm (Bud swell to pink bud)

• Materials: Delegate WG @ 200g/ha
• Comments: Spray if spanworms (also known as inchworms or loopers) are numerous. Provides suppression rather than control.

Mummy berry (Monilinia) (Bud swell to pink bud)

Cultivate before bud break to bury overwintering inoculum. Monitor for trumpet-shaped structures erupting from mummified berries on the ground. Protection is needed when these structures are present. Spray to prevent primary infection of blueberry shoots. Make the first application when the flower buds swell and repeat to ensure protection until first bloom.
Funginex: Do not spray after pink bud stage.

• Materials: Apply one of;
  • Funginex DC @ 1.7-3.0 L/ha
  • Topas 250 E @ 500 ml or Mission 418 EC @ 300mL/ha
  • Allegro 500 F @ 2.24L/ha
  • Serenade ASO @ 24.0 L/ha
• Comments: Topas or Mission: Use a maximum of two applications per season.
  Allegro: Provides suppression rather than control. See Table 2-6. Efficacy Ratings for Pesticides.
  Serenade ASO: Provides suppression rather than control of mummy berry. See notes on Bacillus subtilis (Serenade ASO, Serenade MAX). Expect best results from multiple applications or when used in rotation with other products.

Precautions

Consult the product label for suggested water volumes. For mature highbush blueberries, use 700-1,000 L of water per ha unless otherwise noted on the label.

Products are listed according to insecticide and fungicide family groups. 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 5-9. Products Used on Blueberries

Related Links

• OMAFRA Berry Crops Index Page
• Notes on Blueberry Diseases and Insects
• 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: Berry Crops
• OMAFRA Publication 360: Fruit Production Recommendations