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Spud Smart Webinar: Fighting Common Scab

Common scab is a pervasive threat to some potato-growing regions in Canada. Lesions and cavities on infected tubers can render them unmarketable. Researchers and industry experts are still trying to determine why the pathogen is more prevalent in some fields than others as well as the best methods for fighting the disease. While growers use many different practices to control common scab, none have proven to be totally effective. During this webinar,…

Combatting Common Scab

COMMON SCAB, a bacterial disease that doesn’t affect yields but causes ugly lesions and cavities on infected tubers, which can render them unmarketable, is a pervasive threat in potato-growing areas across Canada.  It has likely been around for as long as people have been growing potatoes, but researchers are still trying to determine why the pathogen is much more common in some fields than others and what the best methods are for…

Fusarium-Infected Seed Potatoes

I have yet to meet a potato grower who is not familiar with the symptoms of the Fusarium dry rot that develops in storage.  The skin of infected areas is wrinkled, and there is a dry, non-smelly rot in the affected flesh.  However, Fusarium may also infect potato seed during transit or handling.  Bruises or wounds allow Fusarium and also soft rot bacteria to get into tubers. I received a photo last…

What’s the Best Choice for Orondis Potato Gold Usage?

In 2017, a very wet year, potato growers who used Orondis for late blight were very pleased with the performance of this fungicide.This year, potato growers can continue using Orondis for late blight during the season, as long as it has not been applied in-furrow at planting for pink rot control. What factors should be taken into consideration to decide on the application timing of Orondis? Orondis Potato Gold has been registered as…

Advancing the Control of Potato Common Scab with Molecular Technology

Common scab is the most important soil-borne disease of potatoes in Ontario and across Canada. Scab does not reduce yield, but the corky, pitted lesions that develop on infected tubers render the potatoes unmarketable. The management practices recommended to control common scab have proven to be inconsistent: they reduce the incidence in some fields but not in others. Recent research has suggested that there are different species of the scab pathogen that…

Preparing Your Seed for Spring

It’s almost that time of year again. A key factor that affects the quality and quantity of potato crop yield under a grower’s control is seed tuber quality. You have decided which cultivar(s) to grow and how much seed you need. Soon it’ll be time to bring that seed home and prepare it for planting. Consider the following: The experience, expertise and integrity of the seed potato grower are the most important…

Cultivar and Common Scab

According to Claudia Goyer, a molecular bacteriologist with Agriculture and Agri-Food Canada (AAFC) in Fredericton, N.B, cultivars differ in terms of how severe common scab will be. No cultivars have true resistance to common scab, where there is no disease at all. “All of them can get common scab. The tolerant ones get really minimal amounts of the disease, just a couple of lesions here and there. The susceptible ones get a…

Keeping Tabs on Late Blight

Strain monitoring in Canada over the past three decades shows successive waves of new strains have replaced older strains of the late blight pathogen. The latest findings from research to track and characterize the strains across the country are a combination of good and bad news with direct relevance for managing the current strains. Rick Peters, a research scientist with Agriculture and Agri-Food Canada (AAFC) in Charlottetown, P.E.I., is co-leading this research…

Syngenta Launches Orondis Gold Potato Fungicide

Syngenta Canada Inc. has launched Orondis® Gold Potato fungicide for suppression of pink rot and Pythium leak in potatoes. Pink rot is a devastating soil-borne disease that thrives in wet, poorly drained soils and can survive in soil for up to seven years. Just a few infected potatoes entering the storage bin can result in substantial losses, infecting healthy tubers and compromising marketable yield. That’s why proactive management of the disease is…

In-Furrow Pink Rot Fungicide Control Active in September?

Most of you probably know that Orondis Gold Potato fungicide, a co-pack containing Orondis and Ridomil (active ingredients oxathiapiprolin and metalaxyl-M), will be available this spring to suppress pink rot and Pythium leak.  The registration is for in-furrow application, but pink rot usually develops at the end of the season.  Will Orondis applied mid-May still be active in September? My colleagues across the border always do a good job evaluating fungicides before…

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