Tag: Holly Derksen

Wheat School: Rating Fusarium Tolerance Performance

Do wheat varieties perform in line with the ratings provided during the registration process? When it comes to fusarium head blight tolerance, the short answer is yes, but the long answer is it depends on the year. Holly Derksen, plant pathologist with Manitoba Agriculture, explains that the province has been tracking resistance performance of wheat… Read more »

Wheat School: Identifying and Managing Stripe Rust

Stripe rust was reported in early spring in Alberta, likely having over-wintered in the southern part of the province, and now there are reports in Manitoba of the fungus arriving on winds from the U.S. In this Wheat School episode, Holly Derksen, plant pathologist with Manitoba Agriculture, Food and Rural Development, describes how stripe rust inoculum moves north from the… Read more »

Soybean School West: Checking for Root Rots and Seedling Diseases

Poor emergence or damping off of young soybean plants can be a sign of a seedling disease or root rot problem, especially following cool, wet weather as experienced in much of the soybean growing part of Western Canada this spring. As Holly Derksen, plant pathologist with Manitoba Agriculture, explains in this Soybean School West episode, there are… Read more »

Crown Rust Resistance Breaking Down in Some “Resistant” Oat Varieties — Ratings Changes Possible

Another gene that has provided resistance to crown rust in oat varieties grown in Western Canada is losing its effectiveness. The Pc91 gene was a source of resistance to crown rust in some of common varieties in recent years, including Souris, Stainless, HiFi, AAC Justice and CDC Morrison, but changes in the crown rust pathogen population in… Read more »

Canola School: Verticillium Wilt Confirmed in Canola — What Now?

It’s too early to say how big a problem verticillium wilt could become for the Canadian canola industry, but it should be on the radar for growers, says the crop pathologist taking the lead on the new disease issue within Manitoba Agriculture. As reported by Real Ag last week, the first known case of Verticillium… Read more »

First North American Case of Canola Disease Found in Manitoba

Editor’s note: This story was updated on Thursday, January 8th with additional information from the CFIA about the location of the case of verticillium wilt in canola. The first North American case of a disease that has caused serious economic losses in Europe’s rapeseed crop has been found in a canola trial plot in Manitoba…. Read more »

Canola School: Getting a Handle on Where Clubroot Exists

With clubroot disease showing up in fields east of Alberta over the last few years, there’s work underway in Manitoba to survey the entire canola-growing region of the province for the presence of clubroot spores. So far, spores or symptoms have been found in 13 fields in 10 rural municipalities in Manitoba. Spore concentrations in… Read more »

Black Chaff, Melanosis, Glume Blotch: The Causes of Darkness on Wheat Heads at Harvest

It may have an ominous sounding name, but black chaff is rarely a cause for major concern in wheat, says a crop pathologist with Manitoba Agriculture. Black chaff is one of several wheat disorders that will catch a grower’s eye at harvest due to the dark colour and discolouration that appears on wheat heads. As… Read more »

Canola School: Aster Yellows: Why it’s Best to Leave the Sprayer in the Shed

Two years ago if you had asked the average Saskatchewan canola grower what aster yellows was, they likely wouldn’t have been too concerned about it, if they had ever heard of it at all. That’s because aster yellows, a disease carried by the aster leafhopper insect that mangles the buds/pods of a plant, typically occurs… Read more »

Wheat School: Don’t Miss the Fusarium Suppression Window!

Manitoba has the not-so-great distinction of being the fusarium hot spot of the Canadian Prairies. This year, ample moisture and recent heat have combined to create a high-humidity soup pot of fusarium head blight growth and spread. Farmers in other provinces need to be on the look out as well, as the disease spreads west…. Read more »

Canola School: Assessing Stands for Root Rot Damage

While seeding may be running a wee bit behind average for many, the long days and warmer soil can mean crops pop up quite quickly. In Manitoba, many canola fields are pushing through in about a week, which makes now a great time to start scouting for a number of things, like flea beetle feeding… Read more »