Berry Bulletin May 19, 2017

 

May 19, 2017Berry Bulletin 2017

Crop development: crops have slowly been advancing with the cool weather last week. Growers have been protecting against frost after a couple cold nights last week- a bit of damage has been seen on strawberries where irrigation or row covers were not used. Day neutral strawberries are in bloom with green fruit. Early June bearing varieties are in full bloom where row covers were used; later varieties have buds in the crown. Raspberry primocanes are emerging and flower buds are beginning to show on overwintering canes. Blueberries are in bloom in southern Ontario and are quickly approaching bloom in later regions.

Blueberries: Use fungicides from different groups to control cane diseases such as phomopsis and anthracnose twig blight. During bloom, choose fungicides that control both anthracnose and botrytis. Check for scale insects on blueberry branches. We have seen more scale in the last couple years, which could be due to SWD sprays affecting natural predators of scale insects. A post-bloom application of Movento can be used when scale crawlers, the first mobile instar, are present. Use black sticky tape to determine when crawlers are active. Plan for thorough pruning next winter to prune out the old canes where the scales overwinter.

Raspberries: Growth has been slow. Primocanes are starting to emerge. It is important to protect growing primocanes and developing laterals from cane diseases with fungicide applications before and during bloom.

Strawberries: Aphids are active and populations are growing. Control is needed before or during bloom. Use Beleaf or Sivanto Prime if your fields are in bloom applying at night when bees are not active. In newly planted fields control aphids with a soil drench of Admire. Not many clipper weevils or tarnished plant bugs have been found in strawberry fields yet but scouts should be on the lookout. Control is need for plant bug if the threshold of approximately one nymph in four flower clusters is reached. Tap flower clusters into a paper plate to find tarnished plant bugs as they fall onto to the plate (Fig. 1). Check for clipper weevil at the edges of the field. If damage is found, border sprays (10-12m) should provide sufficient control.

TPB

Figure 1. Tarnished Plant Bug

Disease control during bloom: There are a number of products registered for botrytis control. Check Pub 360, page 134, for a full list of available products. Pristine, Cabrio and Switch are registered for anthracnose control. Tank mix Pristine with Captan or Maestro for botrytis protection and resistance management. Save Switch for when there is high disease pressure from botrytis and anthracnose, during warm rainy weather at bloom.

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Update on pesticides registered on nectarines

Historically, the following statement appeared at the beginning of the peach calendar in Publication 360:  “All products labeled for use on peach can also be used on nectarine.”  During the summer of 2016, an auditor spotted Decis on the spray record of a nectarine grower and flagged it as unregistered.  After a lot of emails, we received confirmation from PMRA that, indeed, if a product label does not specify nectarine or Crop Group 12-09, it is not legal for use on nectarine.  This prompted a search of all products labeled on peach to see whether nectarine was included.  The following table gives the updated list of products that are not labeled on nectarine.  Products that are in bold with yellow highlight now have label expansions and can be used on nectarines.

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Posted in Apricots, Cherries, fungicides, insecticides, Nectarines, Peaches, Plums, Tender Fruit | Leave a comment

New Food Safety and Traceability Online Courses!

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By Jennifer Jarvis, Stakeholder Communications and Marketing Advisor, OMAFRA

Give your company a competitive edge – take free eLearning courses to learn more about industry best practices and to be more competitive in the marketplace!

Access the new Food Safety and Traceability eLearning courses online on the Agriculture and Food Education in Ontario online learning system through the University of Guelph, Ridgetown Campus.

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Apple Update: May 16, 2017

Crop Stages

  • In all locations bloom stages are pretty spread out, depending on variety and proximity to water.
  • In Essex, Kent Middlesex, Lambton, apple blossoms are at bloom to petal fall.
  • In Elgin, Middlesex, Norfolk, Brant and Niagara, apple blossoms are at early pink to king bloom petal fall.
  • In Grey, apple blossoms are at pink
  • In Durham and Northumberland apples blossoms are at pink to king bloom.
  • Further along the St. Lawrence and into the Ottawa Valley, apples are at early pink to pink.

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Activity of Fungicides and Bactericides on Pear Diseases, 2017

This table provides information on the relative activity of fungicides and bactericides registered on tender fruit.

The numbers within cells represent the relative efficacy of a product against a specific disease.  Increasing numbers equal greater effectiveness.  Cells shaded yellow indicate registered labeled uses in conventional production.  Cells shaded green indicate registered uses with Canadian Organic Certification (Always check with your certifier to confirm products are acceptable).  Cells that are white indicate activity versus diseases that are not on the Canadian label but are on labels elsewhere.  Always use the labeled rate and timing to avoid issues with residues.

Use products only for diseases listed on the product label.   The additional information provided in this table is based on information from other areas.  It is intended to assist growers in choosing the best fungicide for control of pests listed on the product label, while managing resistance and avoiding unnecessary sprays for non-target pests.  Efficacy can be affected by the rate of the product.

New registrations and changes are bold.

Click here for the Activity of Fungicides and Bactericides on Pear Diseases 2017 table.

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Activity of Fungicides and Bactericides on Stone Fruit Diseases, 2017

This table provides information on the relative activity of fungicides and bactericides registered on tender fruit.

The numbers within cells represent the relative efficacy of a product against a specific disease.  Increasing numbers equal greater effectiveness.  Cells shaded yellow indicate registered labeled uses in conventional production.  Cells shaded green indicate registered uses with Canadian Organic Certification (Always check with your certifier to confirm products are acceptable).  Cells that are white indicate activity versus diseases that are not on the Canadian label but are on labels elsewhere.  Always use the labeled rate and timing to avoid issues with residues.  NR below a crop means the product is not registered on that crop and should not be used on that crop.

Use products only for diseases listed on the product label.   The additional information provided in this table is based on information from other areas.  It is intended to assist growers in choosing the best fungicide for control of pests listed on the product label, while managing resistance and avoiding unnecessary sprays for non-target pests.  Efficacy can be affected by the rate of the product.

New registrations and changes are bold.

Click here for the Activity of Fungicides and Bactericides on Stone Fruit Diseases 2017 table.

Posted in Apricots, bactericides, Cherries, diseases, fungicides, Insects and Diseases, Nectarines, New Products, Orchard Spraying, Peaches, Pears, pest management, Plums, Tender Fruit, Uncategorized | Tagged , , , , , | Leave a comment

Activity of Insecticides and Miticides on Grape Pests, 2017

Ratings in shaded cells indicate the insect/mite is listed on the product label for control or suppression. Please see the product label or crop calendars for registered uses. Additional information, derived from other sources, is provided in this table to assist the grower in choosing the best product for control of multiple pests present in the vineyard.

Click here for the Activity of insecticides and miticides on grape pests, 2017 table.

 

Posted in Fresh Grapes, grape pests, Grapes, insecticides, Insects and Diseases, miticides, New Products, pest management, sour rot, Uncategorized, Vineyard Spraying | Tagged , , , , , , | Leave a comment