Publication 360 - Nut Calendar for Ontario

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The Nut Calendar is an excerpt from Publication 360 - Fruit Production Recommendations, 2006 - 2007 version

Table of Contents

1. Pub 360 Chapter 11 - Tree Nuts - Nut Calendar pgs. 255 - 256 - (Pdf format 53k)
2. Walnut Calendar
• Prebloom
• 1st pistillate flower
• Summer sprays
3. Pecan and Sweet Chestnut Calendar
• Prebloom
  
4. Filbert/ Hazelnut Calendar
• Dormant
• Prebloom
• Summer
• Postharvest
  
5. Table 11-1. Products Used on Nut Crops

Read the label and follow all safety precautions.

Consult the product label for suggested water volumes. Otherwise, use enought water to ensure thorough spray coverage. Where the product rate is listed in amount/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 preharvest interval, re-entry period, maximum number of applications and chemical group, see Table 11-1. Products Used on Nut Crops, on page 256.

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

Walnut Calendar

Prebloom

Diseases and Insects

• Leafrollers

Materials and Amount

• Dipel 2X DF @ 1.12 kg/ha

Comments

Apply when small larvae are present. Apply in 600 - 800 L/ha using an orchard air-blast sprayer. Repeat in seven to ten days or after bloom if populations are large. Although Dipel is not toxic to bees, avoid application during bloom. Use 1.6 kg/ha for large or mature trees.

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1st pistillate flower

Diseases and Insects

• Butternut curculio

Materials and Amount/ha

• Surround WP @ 50.00 kg/ha

Comments

Apply when visual inspection shows adult feeding and egg laying scars on new flower shoots. See Using Surround as a Pest Management Tool, on page 105.

Learn more

• Notes on Nut Disease and Insects
  • Butternut curculio

Diseases and Insects

• Walnut blight

Materials and Amount/ha

• Copper Spray @ 4.00 kg/ 1,000 L

Comments

Apply in sufficient water to ensure complete coverage.

Learn more

• Notes on Nut Disease and Insects
  • Walnut blight

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Summer sprays

Diseases and Insects

• Codling moth

Materials and Amount/ha

• Surround WP @ 50.00 kg/ha

Comments

Apply when pheromone traps indicate adult activity. See Using Surround as a Pest Management Tool, on page 105.

Learn more

• Notes on Nut Disease and Insects
  • Codling moth

Diseases and Insects

• Husk maggot

Materials and Amount/ha

• Surround WP @ 50.00 kg/ha

Comments

Apply when sticky traps show adult activity, typically August to mid September. See Using Surround as a Pest Management Tool, on page 105.

Learn more

• Notes on Nut Disease and Insects
  • Husk maggot

Diseases and Insects

• Walnut blight

Materials and Amount/ha

• Copper Spray @ 4.00 kg/1,000 L

Comments

Apply in sufficient water to ensure complete coverage. Apply monthly until husks split, but not after husks split. Do not apply more than four times/season. Do not apply within 40 days of harvest.

Learn more

• Notes on Nut Disease and Insects
  • Walnut blight

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Pecan and Sweet Chestnut

Prebloom

Diseases and Insects

• Leafrollers

Materials and Amount/ha

• Dipel 2X DF @ 1.12 kg/ha

Comments

Apply when small larvae are present. Apply in 600 - 800 L/ha using an orchard air-blast sprayer. Repeat in seven to ten days or after bloom if populations are large. Although Dipel is not toxic to bees, avoid application during bloom. Use 1.6 kg/ha for large or mature trees.

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Filbert / Hazelnut

Dormant

Diseases and Insects

• Eastern filbert blight

Materials and Amount/ha

• Guardsman Copper oxychloride 50 @ 3.00 kg/ha
  or
• Copper Spray @ 3.00 kg/ ha

Comments

Apply during the spring at bud swell and repeat at 10 - 14 day intervals for a maximum of three applications per year. Use 3.0 kg/ha on small trees and up to 9.0 kg/ha on large trees. May be applied up to one day before harvest.

Learn more

• Notes on Nut Disease and Insects
  • Eastern filbert blight

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Prebloom

Diseases and Insects

• Leafrollers

Materials and Amount/ha

• Dipel 2X DF @ 1.12 kg/ha

Comments

Apply when small larvae are present. Apply in 600 - 800 L/ha using an orchard air-blast sprayer. Repeat in seven to ten days or after bloom if populations are large. Although Dipel is not toxic to bees, avoid application during bloom. Use 1.6 kg/ha for large or mature trees.

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Summer

Diseases and Insects

• Aphids

Materials and Amount/ha

• Lagon 480 E @ 5.00 L/ha

Comments

Apply primarily on younger trees when aphids appear. Use reduce rate for smaller, immature trees. Do not apply within 45 days of harvest. One application per year.

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Postharvest

Diseases and Insects

• Bacterial blight

Materials and Amount/ha

• Guardsman Copper Oxychloride 50 @ 3.00 kg/ha
  or
• Copper Spray @ 3.00 kg/ ha

Comments

Apply the first spray in late August / early September before the start of the fall rains and nut drop. Repeat after harvest at 3/4 leaf fall. Repeat early spring just before leaf bud break. Use 3.0 kg / ha on small trees, and up to 9.0 kg/ha on large trees in proportionately more water.

Learn more

• Notes on Nut Disease and Insects
  • Bacterial blight

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Table 11-1. Products Used on Nut Crops

Use this table as a guide, but refer to product label for specific information.

The preharvest interval is the number of days between the last spray and first harvest.

The maximum number of applications is the labelled maximum number for the growing season, and may be higher than what is recommended for resistance management or for preserving beneficial insects.

Table 11-1. Products Used on Nut Crops

Product name	Common name	Group	Preharvest interval (days)	Maximum # applications/ season
Copper Spray1,2	copper from copper oxychloride	inorganic	40	3
Dipel 2X DF1,2,3	Bacillus thuringiensis	B.t. microbial	1
Guardsman copper oxychloride 502	copper from copper oxychloride	inorganic	1	3
Lagon 480 E2	dimethoate	organophosphate	45	1
Surround WP1	kaolin		0

¹ Walnut
² Filbert / Hazelnut
³ Pecan and Sweet Chestnut

Learn more

• Notes on Nut 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
  • OMAFRA Publication 360: Fruit Production Recommendations

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