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Resistant clubroot a ‘nightmare’ scenario Continuous cropping likely cause of new resistant clubroot pathogen, but canola council says tight rotations are still OK for some By Alexis Kienlen af staff

T

he breakdown of a clubrootresistant variety just four years after it came on the market is a “nightmare” — but doesn’t mean growers in clubrootfree areas can’t plant canola every other year, say industry officials. “It’s unfortunate that this had to happen,” said Ward Toma, general manager of the Alberta Canola Producers Commission. “We had a tool in resistance and it’s a nightmare that it broke down so fast. And it broke down so fast because it was not used properly, from what we understand.” Late last summer, several growers in the Edmonton area who planted resistant varieties developed in 2009 reported finding dead patches and infected plants in their fields. “We were hoping that we would get maybe eight to 10 years from the current sources of resistance but we got four,” said Clinton Jurke, agronomy specialist with the Canola Council of Canada. “But that’s not to say that all resistance has failed out there.” The canola council came under criticism earlier this year from some, including the past chair of the Saskatchewan Canola Development Commission, for backing tighter rotations in some circumstances. In announcing a new target of 26 million tonnes of production by 2025, the council released a document stating crop insurance data showed “in many areas, growers are maintaining canola yields while growing the crop more frequently.” A minimum one-in-four-year rotation is still recommended for clubroot-infested fields, but many farmers find themselves in a grey area. Round Hill grain farmer Humphrey Banack is one of them.

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His farm is 80 kilometres from Leduc County, a clubroot hot spot. Banack and his brother, who runs a custom spraying operation, keep their equipment clean and ensure oilfield equipment coming onto their land is clean, too. They also avoid clubroot-infested fields, and rigorously scout their crops for signs of the disease. Clubroot has come to their county, but so far they haven’t found any on their land. Still, Banack plans to plant resistant varieties for the first time. “We wanted to try it out this

year and see how it performs,” said Banack, who is vice-president of the Canadian Federation of Agriculture. “If there are small amounts (of clubroot) out there, maybe it will provide us a yield benefit.” About 45 per cent of his acres will be seeded to canola, with the rest divided among wheat, pulses, and flax. Some of his fields are on threeyear rotations, but most are on a canola-wheat rotation.

see CLUBROOT } page 6

A two-year rotation is OK, as long as you aren’t in a clubroot-infested area, says Ward Toma, general manager of Alberta Canola Producers Commission.  supplied photo

Has productivity trumped welfare in livestock breeding? } PAGE 3


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