Publication 360 - Blueberry Calendar for Ontario

NOTE:

Extract of Publication 360, Fruit Production Recommendations , Order this publication

Table of Contents

1. Blueberry Calendar
• Bud break
• Bud swell
• Green tip
• Pink bud
• First bloom
• Petal fall
• Fruit ripening
2. Pub 360 Chapter 8 - Berry - Blueberry Calendar - (Pdf format 54k)
3. Table 8-9. Products Used on Blueberries
4. Related Links
5. For more Information

Blueberry Calendar

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

Check Table 8-9. Products Used on Blueberries, on page 152

**Page numbers refer to pages in Publication 360 - Fruit Production Recommendations**

Bud break

Diseases and Insects

• Mummy berry

Materials and Amount/ha

• Funginex 190 EC @ 1.70 L
• Topas 250 E @ 500 ml
• Mission 418 EC @ 300 ml

Comments

Spray to prevent primary infection of blueberry shoots. Make the first application when flower buds swell and the second application when leaf buds swell, approx 10-14 days later.

Learn more

• Notes on Blueberry Diseases and Insects
  • Mummy berry

   

   

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Bud swell

Diseases and Insects

• Leaf tiers

Materials and Amount/ha

• Decis 5 EC @ 150 ml

Comments

Damage occurs very early. 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

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Green tip

Diseases and Insects

• Phomopsis stem canker
• Anthracnose fruit rot

Materials and Amount/ha

• Cabrio EG @ 1.00 kg
• Bravo 500 @ 7.20 L

Comments

Cabrio EG Maximum two consecutive applications, then alternate with fungicides from different families.

Bravo will also control alternaria fruit rot.

Learn more

• Notes on Blueberry Diseases and Insects
  • Anthracnose fruit rot
  • Phomopsis stem canker

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Pink bud

Diseases and Insects

• Phomopsis stem canker
• Anthracnose fruit rot

Materials and Amount/ha

• Cabrio EG @1.00 kg
• Bravo 500 @ 7.20 L

Comments

Cabrio EG Maximum two consecutive applications, then alternate with fungicides from different families.

Bravo will also control altenaria fruit rot.

Learn more

• Notes on Blueberry Diseases and Insects
  • Anthracnose fruit rot
  • Phomopsis stem canker

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First bloom

Do not apply insecticides while blueberries are in bloom. See bee poisoning on page 79.

Diseases and Insects

• Botrytis twig and blossom blight
• Botrytis fruit rot (grey mould)

Materials and Amount/ha

• Supra Captan 80 WDG @ 2.25 kg
  or Maestro 80 DF @ 2.25 kg
• Elevate 50 WDG @ 1.70 kg
• Lance WDG @ 560 g
• Ferbam 76 WDG @ 3.75 kg

Comments

Fungicides for botrytis are more important when wet weather occurs. Repeat at seven to ten day intervals through bloom if weather is wet. Choose fungicides from different families to reduce the development of resistant strains.

Ferbam: Helps control mummy berry. Do not use later than mid-bloom.

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Petal fall

Diseases and Insects

• Cherry fruitworm
• Cranberry fruitworm

Materials and Amount/ha

• Malathion 25 W @2.25 kg
• Sevin XLR @ 4.00 L
• Dipel 2X DF @ 1.68 kg

Comments

Use the pheromone traps to monitor moth activity and to time the spray more accurately.

Sevin or Malathion: Apply five to seven days after trap catches peak. A second insecticide is required if trap catches remain elevated seven days after application.

Dipel: Spray at peak trap catch and continue at three to seven day intervals, to a maximum of four applications.

Malathion also controls aphids

Learn more

• Notes on Blueberry Diseases and Insects
  • Cranberry and cherry fruitworm
• Control of Cranberry and Cherry Fruitworm in Highbush Blueberries, Hort Matters newsletter article

Diseases and Insects

• Phomopsis stem canker
• Anthracnose fruit rot

Materials and Amount/ha

• Cabrio EC @ 1.00 kg
• Bravo 500 @ 7.20 L

Comments

Cabrio: Make no more than two consecutive applications, then alternate with fungicides from different families.

Bravo also controls Alternaria fruit rot. Bravo may cause fruit injury if applied to green fruit.

Learn more

• Notes on Blueberry Diseases and Insects
  • Anthracnose fruit rot
  • Phomopsis stem canker

Diseases and Insects

• European Chafer larvae
• Japanese beetle larvae

Materials and Amount/ha

• Admire 240 F @ 1.20 L

Comments

Do not apply during bloom. Apply just prior to egg hatch (shortly after adults are active) to damp soil around bushes and to grass covered areas around blueberry field. Apply in 200 L water/ha. Move the product into the root zone with 5-10 mm irrigation within 24 hours of application but avoid over watering. Maximum one application per season, at petal fall, fruit ripening or after harvest.

Learn more

• Notes on Blueberry Diseases and Insects
  • White grub complex

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Fruit ripening

Diseases and Insects

• Fruit rot (Boytrytis grey mould)

Materials and Amount/ha

• Supra Captan 80 WDG @ 2.25 kg
  or Maestro 80 DF @ 2.25 kg
• Elevate 50 WDG @ 1.70 kg
• Lance WDG @ 560 g

Comments

Spray at seven to ten day intervals if the blossom blight phase of botrytis was not controlled. Choose fungicides from different chemical families to reduce the development of resistant strains.

Diseases and Insects

• European chafer larvae
• Japanese beetle larvae

Materials and Amount/ha

• Admire 240 F @ 1.20 L

Comments

Do not apply during bloom. Apply just prior to egg hatch (shortly after adults are active) to damp soil around bushes and to grass covered areas around blueberry field. Apply in 200 L water/ha. Move the product into the root zone with 5-10 mm irrigation within 24 hours of application but avoid over watering. Maximum one application per season, at petal fall, fruit ripening or after harvest.

Diseases and Insects

• Blueberry maggot

Materials and Amount/ha

• Cygon 480 (highbush) @ 830 ml
• Cygon 480 (lowbush) @ 580 ml
• Lagon 480 E (highbush) @ 825 ml
• Lagon 480 E (lowbush) @ 600 ml
• Imidan 50 WP @ 2.25 kg
• Sevin XLR @ 4.00 L
• Malathion 25 W @ 2.25 kg

Comments

Monitor for blueberry maggot using yellow sticky traps.

Ontario is considered free from blueberry maggot, except for regulated areas. Growers in regulated areas (including Wainfleet and Charlotteville townships) should spary for this pest.

Apply the first spray when first blueberry maggot are trapped or when berries begin to trun blue, about July 5-15, depending on the product. Protection is needed as long as adults are active. Imidan and Cygon provide 10-12 days protection under normal conditions. Residual activity of Sevin and Malathion is much shorter.

Cygon: Maximum two applications per season.

Imidan: Maximum two applications per season.

Learn more

• Notes on Blueberry Diseases and Insects
  • Blueberry maggot

Learn more

• 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

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