Haskap Workshop at CSHS 2018: Time Running Out for Pre-registration

The Canadian Society for Horticultural Science (CSHS) Annual Conference will be held in Niagara Falls, Ontario this year!

Several special symposia will be held during the conference, including a Haskap Workshop presented by Dr. Bob Bors from the University of Saskatchewan on Thursday, October 4, 2018.

For those interested in attending just the Haskap Workshop, you can register separately from the other CSHS meetings.

Time is running out for pre-registration.  Registration for the Haskap Workshop is required by September 20, 2018 (no walk-ins).  Registration cost for the Haskap Workshop is $150.  Register on-line at the following link: https://agbio.usask.ca/cshs2018/

Haskap Workshop CSHS 2018




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Weeds to Watch: Invasive Pigweeds – Waterhemp and Palmer Amaranth

By: Kristen Obeid, OMAFRA Weed Management Specialist – Horticulture
Dave Bilyea, Weed Management – Horticulture, University of Guelph, Ridgetown Campus

The first line of defense against waterhemp and palmer amaranth is proper identification.  It is EXTREMELY difficult to identify waterhemp and palmer amaranth from other pigweed species especially as seedlings.

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Delegate Insecticide now registered for weevils in hazelnuts and chestnuts

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Delegate Insecticide (spinetoram) for suppression of chestnut weevils and hazelnut weevils on tree nuts, crop group 14-11 in Canada. Delegate Insecticide was already labeled for use on tree nuts for certain other pests, however prior to this label expansion there were no registered products available to control hazelnut and chestnut weevils in Canada. Continue reading

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Quinoa Crop Update – August 16, 2018

Evan Elford, OMAFRA New Crop Development Specialist
Melanie Filotas, OMAFRA Horticulture Integrated Pest Management Specialist

At this point in the growing season we typically receive calls from quinoa growers about goosefoot groundling moth (Scrobipalpa artiplicella), tarnished plant bug (TPB) (Lygus lineolaris), quinoa downy mildew (Peronospora farinosasp. Chenopodii) and Passalora leaf spot. These insects and diseases are commonly found each season in Ontario quinoa fields.

Currently there are no registered pest-control products for most insects and diseases on quinoa in Canada. However, Dipel and Bioprotec (Bacillus thuringiensis) are registered for use on some caterpillars in quinoa (i.e. European Corn Borer and Armyworms). However, these products must be applied when caterpillars are actively feeding and are most effective when they are small.

In previous years, caterpillars, in particular goosefoot groundling moth, have led to complete destruction of the crop at some grower sites in the province, so scouting, early identification, and management of the pest is important.

Lep Pest OMAF photo 2

Goosefoot Groundling Moth larvae (caterpillar)

TPB has a wide host range and multiple generations through the season. They feed on reproductive organs of plants and cause mechanical damage. In quinoa, the developing seeds are typically affected and the general sense is that TPB is a leading cause of low harvest index.


Tarnished Plant Bug (TPB) adult

Quinoa downy mildew and Passalora leaf spot are diseases that have been documented over a few growing seasons in Ontario. To date they have only been recorded as minor infections affecting mainly the lower leaves of the plants.

Quinoa downy mildew on leaves

Quinoa downy mildew on quinoa leaves

For more information on quinoa production in Ontario:
OMAFRA Quinoa Crop Profile
OMAFRA Agronomy Guide for Field Crops Pub 811, Chapter 7: ‘Other Crops’ 
Optimal planting date, row width, and critical weed-free period for grain amaranth and quinoa grown in Ontario, Canada (Nurse, R.E. et al., 2016.  Canadian Journal of Plant Science. Vol. 96 No. 3 pp.360-366)
Crop Injury And Yield Response Of Quinoa To Applications Of Various Herbicides (Crop Advances: Field Crop Reports, 2015)
Quinoa Variety Assessment in Eastern Ontario (Crop Advances: Field Crop Reports, 2014)
Keen-what? Quinoa: Things to consider for quinoa production (ONOrganic Newsletter, September 2013)

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Ginseng Crop Update – August 3, 2018

The weather has been mostly cloudy and very humid for most of the past week. Combined with moisture stress and previous or continued damage from Alternaria, this has led to the development of Botrytis blight. The humid conditions have allowed the lesions of Botrytis blight to spread on leaves in such a way as to develop an Alternaria-like appearance. These two diseases can be easily confused under these conditions. Concentric rings are appearing in the Botrytis lesions (Figure 1), which are usually typical of Alternaria leaf blight. However, Botrytis lesions lack the typical yellow halo that is characteristic of Alternaria (Figure 2), and that is the best way to distinguish them. If Alternaria has been killed by a fungicide it will lose the yellow halo, but the lesions will become dry and often break apart and often partially fall off the plant.

Figure 1. Botrytis blight lesions developing on ginseng leaves. Note the lack of a yellow halo.
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Hop Harvest Timelines in Ontario

As we draw closer to the 2018 hop harvest season, grower reports from across the province suggest the crop is anywhere from one week ahead of normal to one week behind normal depending on cultivar and geographic location/growing zone.

Here is a re-blog of some harvest guidelines posted in 2017:

Hop production logo

By Evan Elford, OMAFRA New Crop Development Specialist & Alexandria Verkuyl, OMAFRA Summer Horticultural Research Assistant

As hop harvest approaches each year, questions arise about harvest timelines for specific cultivars grown in Ontario. Since hops are a re-emerging crop in the province, only preliminary information has been collected from replicated trials.  Here are a few guidelines and suggestions for planning your hop harvesting schedule this year.

Moisture test:
Target 20% dry matter in hop cones.  Moisture levels for some cultivars may be optimal at a slightly higher or lower dry matter percentage, but most fall within 20 ±  2% range.  By targeting initial harvest at 20% dry matter, larger fields taking more time to harvest or cultivars being harvested over multiple days will hopefully be completed within an acceptable moisture range.

Historical records:
Historical harvest records can help to schedule cultivar-specific harvest windows in your growing area but should always be confirmed with moisture tests. Table 1 depicts harvest timelines over two years for 10 different cultivars grown in a randomized and replicated trial at the Simcoe Research Station, Norfolk County, Ontario.  This table can be used as a guideline to better understand when specific hop cultivars may be maturing in your part of the province.  Keeping your own harvest records will help fine tune harvest dates in your particular growing region. Table 2 outlines the same cultivars with harvest dry matter, yield in kg/ha after drying and resulting alpha and beta acid ranges.

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GOHCBC Filling Up Fast!

After an unprecedented response since competition registration opened last week, the Great Ontario Hopped Craft Beer Competition is now 2/3rds full!


The 2019 beer style is New England India Pale Ale (NEIPA).

For more information and to register online visit www.onhops.ca!

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