Managing Bulb and Stem Nematode Requires Clean Seed and Fields

by Michael Celetti, Plant Pathologist – Hort Crops, OMAFRA

The bulb and stem nematode (Ditylenchus dipsacci) is a very destructive pest of garlic, onion, leek as well as many other host crops.

Garlic bulb infested with bulb and stem nematode
A garlic bulb infested with bulb and stem nematodes invaded by soft rot bacteria. Often symptoms resemble Fusarium basal plate rot.

Continue reading Managing Bulb and Stem Nematode Requires Clean Seed and Fields

Introducing Marion Paibomesai as new OMAFRA Vegetable Crops Specialist in Guelph

by Marion Paibomesai, OMAFRA, Guelph

I worked for OMAFRA as a summer student for two years, which involved scouting cole and root crops across southern Ontario and developing pest identification keys for Ontario CropIPM, OMAFRA’s integrated pest management (IPM) computer assisted training tool. Always excited to learn new things, I will be involved in numerous commodities. I will be mainly dealing with brassicas, root, bulb and leafy green crops while contributing to some work in cucurbits, sweet corn, peas, beans, and asparagus. I am interested in hearing about the 2010 season. Contact me to let me know your challenges and successes of 2010 and objectives for 2011.

Contact info: Marion Paibomesai – phone: 519-826-4963; email:

Can I apply nitrogen in the fall?

by Keith Reid, Soil Fertility Specialist, OMAFRA

Ads are appearing in some farm papers promoting fall application of “protected” forms of nitrogen (N), which has led to questions about whether this is a good idea.  Fall applied N is a common practice in the western half of the corn belt, and in the prairies, where the cold over winter tends to be consistent so N applied as ammonium will stay in that form, and where there isn’t much excess moisture around (most years) to leach the N out of the soil profile before crop uptake the next spring.  If temperatures warm up in the fall, or in the early spring, then the ammonium can convert to nitrate, which is then subject to losses through leaching or denitrification during the spring before the crop is there to absorb the N out of the soil.  These variable fall and winter conditions are much more common in Ontario than in the prairies.  This means that the amount of fall applied N that remains in the soil available to a following crop ranges from 100% (rarely) to 0% (frequently). Continue reading Can I apply nitrogen in the fall?

Carrot Growers Receive Emergency Use Registration for White Mold

J. Chaput, OMAFRA, Minor Use Coordinator, Guelph

The Pest Management Regulatory Agency (PMRA) recently announced the approval of an emergency use registration for SCHOLAR 50WP (fludioxonil) for control of white mold (Sclerotinia) on stored carrots in the provinces of Quebec, Nova Scotia, Prince Edward Island, Manitoba, Saskatchewan, Alberta, British Columbia and Ontario.  Scholar WP was already labeled in Canada for control of post-harvest diseases on pome fruit and stone fruit.  Furthermore a complete minor use submission is underway with the Agriculture & Agri-Food Canada, Pest Management Centre (AAFC–PMC) minor use program to seek eventual, full registration of SCHOLAR for white mold control on stored carrots in Canada. Continue reading Carrot Growers Receive Emergency Use Registration for White Mold

Ontario processing vegetable industry bursaries available

The Ontario Processing Vegetable Growers (OPVG) and the Ontario Fruit and Vegetable Processors Association (OF&VPA) are continuing with a bursary fund to support and encourage individuals pursuing a career in any aspect of the processing vegetable industry. These organizations are working together to ensure that there are new individuals who will have the interest, skills and abilities to further develop and grow this sector of Ontario’s agri-food economy. Continue reading Ontario processing vegetable industry bursaries available

Season Extension and High Tunnel Webinar Series Offered

Learn more about pest management in season extension production systems such as high tunnels by registering for a new webinar series sponsored by the Great Lakes Vegetable Working Group, the University of Illinois Extension, and a Sustainable Agriculture Research and Education Professional Development grant.  There will be five 1-2 hour webinars produced on November 1st, 3rd, 8th, 16th, and 18th.  The first three webinars will focus on an introduction to pest management in various season extension systems, focusing on tomatoes and winter crops. The last two webinars will be geared toward soil, water, and nutrient management, plus a summary of the U.S. Environmental Quality Incentive Program (EQIP) high tunnel pilot project initiated in 2010. Continue reading Season Extension and High Tunnel Webinar Series Offered

Information for commercial vegetable production in Ontario