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FMC of Canada has announced registration of Fracture fungicide in Canada. On field tomatoes, it is registered for control of Botrytis gray mold. The active ingredient is BLAD polypeptide. For more information, see the FMC of Canada website.

Hannah Fraser, Entomology Program Lead (Hort), OMAFRA

Brown marmorated stink bug (BMSB) adults have been steadily moving out of their overwintering sites since mid-April and have been captured in a pheromone trap located in one of our hot spots in Hamilton, ON, over the last couple of weeks. Adults have also been collected off garden plants in the same area, where some feeding injury has occurred. Include BMSB in scouting activities for early crop pests, particularly in peaches. Make sure to monitor border areas and check for BMSB on buckthorn, which seem to be an important season-long host in Ontario.

As of 2014, BMSB has been identified as established in the Hamilton / Burlington area, Windsor, London, St. Catharines and Newboro. Surveys conducted by OMAFRA, the University of Guelph and Agriculture and Agri-Food Canada in 2013-2014 have also trapped this pest on farms located in Beamsville, Niagara-on-the-Lake, Niagara Falls, St. David’s, Waterdown, Smithville, Cedar Springs, Essex. In addition, there have been numerous homeowner finds in Brampton, Fort Erie, Grimsby, Oakville (photos only), Milton, Niagara Falls, Stoney Creek, Toronto, Vaughan, Cedar Springs, Welland (photos only), Delhi, Kincardine, Maidstone, Paris, Tecumseh, Ottawa and most recently in Kitchener. We will be continuing our survey work in southern Ontario over the next few years (2015-2017). Continue Reading »

The program is out for Southwest Crop Diagnostic Days 2015, July 8-9 at Ridgetown Campus.

  • Hitting the Goldilocks Spot – Managing residue and building soil structure for better crop establishment.
  • Roots and Shoots – Digging deeper into cover crops.
  • Weed-posium Workshop – Problematic Pigweeds, a small group that presents some big challenges.
  • Narrowing the Yield Gap of 30” Soybean Rows – Wide rows are becoming more popular and have a number of advantages. Do inputs such as banded fertilizers, foliar fungicides, and foliar fertilizers work ? This stop will also address how light interception impacts yield.
  • Timing Matters – Determining cereal stages for application of growth regulators, fungicides and nitrogen.
  • Herbicide Injury in Corn – Learn to recognize the symptoms caused by new and common products.
  • Herbicide Injury in Soybeans – A hands-on look at herbicide injury in soybeans.
  • Feeling the Pressure – How nozzle pressure affects spray quality and coverage. A demonstration of the negative impacts of using spray nozzles outside their ideal pressure range…. and it happens all the time.
  • Water Use Efficiency – Is water the next limiting factor in crop production?
  • Disease Management and ID – IDing common diseases and management options such as fungicides for soybeans and corn.
  • Carbon Copy Corn Plants – Quantifying plant stand variability and its impact on corn yield potential

Continue Reading »

Jump to: 2015 Tomato Nematode Survey Notice

In part 1 of this article, we outlined a project in which OMAFRA staff tested some nematode sampling and handling scenarios to look at some of the ways nematode soil samples can go wrong and find out what impact to expect.

Part 1 covered the impacts of sampling: proper depth, proper mixing, size of sample area. Here in part 2, we will find out if there’s any point in sending the lab a nematode soil sample that for one reason or another didn’t end up being stored properly or delivered right away. Continue Reading »

Jump to: 2015 Tomato Nematode Survey Notice

Spring is a good time to sample horticultural fields for plant parasitic nematodes. Nematode counts in the spring are lower than in the fall, but existing nematode thresholds are based on spring sampling.

If you’ve ever sampled for nematodes in soil, you’ve probably (hopefully!) read the guidelines for sampling and handling of samples. But what if things don’t go according to plan and they didn’t get refrigerated right away or the person you gave the sampling job to didn’t quite follow your instructions? Are the samples ruined? What can you get away with and what will result in completely inaccurate results? When you’ve gone to the trouble of sampling and are about to invest in paying a lab for nematode counts, this is something you need to know.

OMAFRA specialists tested some scenarios a few years ago to look at some of the ways nematode samples can go wrong and find out what impact to expect. Continue Reading »

by Elaine Roddy, OMAFRA and Cheryl Trueman, University of Guelph – Ridgetown Campus

Seed borne diseases represent a real threat to pumpkin and squash production. Commercial seed is typically grown under arid conditions, and is carefully monitored to ensure it is disease-free. It is difficult to employ those precautions to saved seed produced on the farm here in Ontario.

A new disease that is cause for considerable concern is bacterial leaf spot (Xanthomonas cucurbitae). While it has only been identified in 2 locations in Ontario (Kent County in 2012 and Elgin County in 2014), experience in the mid-western US has shown that field infestation levels of 60-80% are not uncommon.

In 2014, we investigated methods of on-farm seed treatment to disinfest saved-seed. Both the hot water treatment and the chlorine treatment effectively killed the bacteria present on the batches of seed infested with X. cucurbitae.[1] There was a 5% reduction in germination of the chlorine-treated compared to untreated seed. Germination rates in the hot-water treated seed were similar to those in the untreated seed.

The methodology used in the 2014 study is outlined below.  **Note: test a small batch of seed for each cultivar to be treated. The 2014 study was conducted on Waltham butternut squash. Other varieties or types of cucurbits could potentially be more sensitive to either the chlorine or hot water treatments. In particular, other researchers have reported negative effects of hot water treatment on cucurbit seedling emergence (Miller and Ivey, 2005). Continue Reading »

Reference books for vegetable crop scouts -- some suggestions

Reference books for vegetable crop scouts — some suggestions

As mobile and connected as the world is getting with smart phones and tablet computers, there’s probably still a place for the good old fashioned reference book — especially those full of photos of crop pests and disorders.  I have a small crate of “picture books” that I keep in my vehicle during the growing season and bring in to my office for the winter.

I often get asked, “Where can I buy this book?”, so here’s a list of sources for some of my favourites (and some that are on my Christmas list). Continue Reading »

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