AgronomyCrop ProductionHeavy rains cause losses in Ontario potato fields

Heavy rains cause losses in Ontario potato fields


After a month of good growing conditions and positive reports amid sporadic news on disease potential, word from one of Ontario’s potato-growing regions is that roughly 1,000 acres of potatoes have been lost due to flooding.

Drenching rains in midwestern Ontario have left both commercial fields and variety plots ruined.

Rainfall amounts from June 22 to 23 varied in the potato-growing areas, with the Orangeville and Beeton districts the hardest hit. Orangeville received 5.5 inches of rain while Beeton, to the northeast, received 3.5 inches. Roughly 100 acres in that region were lost.

In other locales, Shelburne’s growers recorded between two and four inches, Simcoe-Delhi saw roughly 1.5 inches; Burford to Aylmer received one to two inches, as did the Alliston-Stayner corridor. At the other end of the spectrum, the Leamington area received less than an inch, and some growers are concerned about the dryness.

Eugenia Banks, a consultant with the Ontario Potato Board, said she thought her variety trial near Beeton was ruined, but it was saved when standing water was redirected to a nearby drainage ditch. Her plot north of Alliston also survived, with the chipping variety Spartan Chipper beginning to bloom (almost as early as Dakota Pearl, she added). Fresh market varieties Envol and Glossy are also at the early bloom stage.

The heavy rains will challenge growers in three ways, Banks said:  nitrogen leaching, the potential for increases in late blight, blackleg, aerial stem rot and soft rot, and a high probability of quality problems in fields where growth is advanced.

The nitrogen issue, Banks said, can be fixed, but the late blight issue is a concern. Spores of the disease have yet to be detected in Michigan, Wisconsin and Maine, and Banks received the results from spore traps in the Alliston and Shelburne regions from late last week, with no late blight spores detected.

In fields where late blight spores are detected, she recommended an application of Bravo or a specific late blight fungicide. As for blackleg and aerial stem rot, Banks suggested copper hydroxide (Parasol or Kocide) as options.

In terms of quality issues in wet fields, growers should look for tuber malformations, growth cracks and hollow-heart developing due to the excessive precipitation.


Trending This Week

Spudnik 8312 planter

Manitoba Potato Planting Nearing Finish Line

Almost 95 per cent of Manitoba's processing potato crop has been planted, the May 26 provincial potato report from Manitoba Agriculture’s Vikram Bisht said. Seed...
Person making a plan

Setting Goals in Cover Cropping — A Key to Success

Where are you going? How soon do you want to get there? These are questions we need to ask before we head out on...
Newly emerged rows of potatoes

It’s Go-time for Growing Season 2023 (But Don’t Forget Storage, Too)

Planting is on the horizon in some areas and in full swing in others! After a frustratingly cool and slow spring in most potato-growing...
Beer at bar

What About Sustainability in Storage?

I was having a beer with a potato farming buddy a couple nights ago and – as usual - we started talking shop: what’s...
Green potato field

How Do We Achieve Meaningful Sustainability?

It seems everyone is talking sustainability today. But, what does sustainability really mean in the context of today’s farming realities, and how do we...