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A) A spot in a field of Heinz 1350 tomatoes (arrows) severely affected by P. Add Kocide or Parasol to the tank mix to reduce the risk of tuber infection. I 14 lnventaire des maladies des plantes au Canada, VolFigure 1. Keep fields protected with fungicides specific for late blight.

Any area that is protected from the wind where leaves tend to remain wet longer.

Windborne spores may blow in and infect here. Also, wheel track areas usually remain damp or wet after other parts of the field have dried up. This area remains wet longer than areas farther out on the boom.

Look closely at the plants under the first tower of center pivots.

Pivot center points and pivot wheel tracks.

Low lying areas that tend to be wet for long periods after rainfall.

Monitor them closely, especially risky areas in fields such as:

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It is critical to keep your fields free of late blight at the end of the season.

#Tomato blight ontario pdf#

F or information on registered tomato fungicides for Ontario, s ee OMAFRA’s Vegetable Crop Protection Guide and 2016 supplement (get the pdf by contacting OMAFRA’s contact centre at 1-87 or Always read and understand the label before using any crop protection product.There are still many fields in the province that are green and may need three weeks to reach the finishing line.

Keep in mind that the efficacy ratings linked above are US sources and not all of the products are registered in Canada, or registered on late blight of field tomato. If you didn’t find the product information you were looking for, check out the fungicide efficacy ratings from other locations: Wisconsin (late blight), New York (late blight), New York (late blight, early blight), Georgia (various tomato diseases). Therefore, it is not possible to include observations on product consistency in ratings. Lettuce With a little care, you can say goodbye to grocery store lettuce forever.

#Tomato blight ontario trial#

Ratings represent results of only one efficacy trial when disease pressure was high. Potatoes Not nearly as hard as I thought they would be. Septoria leaf spot pressure is inconsistent at the Ridgetown Campus, University of Guelph. The tomato (/ t m e t o / or / t m t o /) is the edible berry of the plant Solanum lycopersicum, commonly known as the tomato plant. Therefore, it is not possible to include observations on product consistency in ratings. Tomatoes: whole, halved vertically and halved horizontally. Ratings represent results of only one efficacy trial when disease pressure was high.

Early blight disease pressure is inconsistent at the Ridgetown Campus, University of Guelph.

Only data from trials with high disease pressure were considered in developing these ratings.

Fungicide trials for anthracnose management are completed on a regular basis at the Ridgetown Campus, University of Guelph.

Tom Zitter oxathiapiprolin provided very good (+++) control when applied in rotation with ++ rated fungicides in a trial in Pennsylvania.

Orondis Ultra (Group U15 + 40, oxathiapiprolin + mandipropamid): mandipropamid is rated ++ by Dr.

Tom Zitter Zampro was equivalent to programs using ++ and +++ rated fungicides in a trial in Pennsylvania.

Zampro (Group 40 + 45, ametoctradin + dimethomorph): dimethomorph is rated ++ by Dr. Caused by a soil-borne fungus that targets Solanaceous plants (tomato, pepper, potato, eggplant), fusarium wilt often causes no symptoms until plants are mature.

Efficacy trials completed in the Great Lakes Region suggest:

Some fungicides are not included in the summary.

Tomatoes are heavy feeders and need fertilizer throughout the growing season. A balanced fertilizer such as a 10-10-10 should be fed biweekly or monthly. Tom Zitter (Cornell University) for late blight was compiled by Janice LeBoeuf (OMAFRA) in 2015 and is posted here. What to do about it: Make sure you are feeding your tomato plants throughout the season.

An Ontario-specific version of fungicide ratings by Dr.

Click on each table to see larger versions.

Only products labelled for ‘control’ of the specific disease are included in each table except where noted.

To help you identify it, here is a gallery of photos of the symptoms on tomato.

Always check the most recent version of the product label before applying any product. AugComments 2 Late blight is being found in many locations in Ontario.

The tables are for information only and do not guarantee successful results with the use of any product.

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Please contact the author for more information on research methods and copies of full reports. These tables were created using results from replicated processing tomato field trials at the Ridgetown Campus, University of Guelph.By: Cheryl Trueman, College Professor, University of Guelph-Ridgetown Campus and Elaine Roddy, Vegetable Specialist, OMAFRA-Ridgetown About these tables: