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Crops

Late Blight Travels In Unusual Ways

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“It’s a community disease – it spreads far and fast. Don’t try to hide it.” – GARY SECOR The U. S. potato industry was confronted with a widespread outbreak of late blight in 2009 that originated from a surprising source. “It was from some tomatoes that were being distributed in the field to big box
Crops

New Strains Raise Long-Term Blight Risk

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Until the mid-1990s, Canadian potato growers’ late blight concerns were limited to a single genotype – the US-1 variant – and it was sensitive to the relatively cheap and widely available fungicide Ridomil, says AAFC plant pathologist Rick Peters. “That changed in 1994, with an influx of new strains,” says Peters. Suddenly growers found themselves
Crops

Products Now Labelled For Broader Use

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Titan seed-piece treatment has an expanded label to include control of above-ground pests such as: Colorado potato beetle, aphids (potato, green peach, foxglove and buckthorn), potato leafhopper and potato flea beetle, making it the broadest-spectrum insect seed-piece treatment available for Canadian potato growers. Titan, a Group 4 insecticide, was initially registered in early 2009 to
Crops, Oilseeds

Time To Evaluate Sclerotinia Risk

Late-seeded and reseeded canola fields should now be assessed for risk to sclerotinia stem rot infection to determine if a fungicide application will be economical, according to the Canola Council of Canada. Many factors affect the risk of infection including: Heaviness of the crop canopy Amount of moisture received in the two weeks prior to
Country Crossroads

Potato Famine Disease Striking Home Gardens In U. S.

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Late blight, which caused the Irish Potato Famine of the 1840s and 1850s, is killing potato and tomato plants in home gardens from Maine to Ohio and threatening commercial and organic farms, U. S. plant scientists said July 10. “Late blight has never occurred this early and this widespread in the United States,” said Meg
Crops, Oilseeds

Variable Staging Complicates Disease Control

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Should a fungicide be applied to canola now when the oldest plants flower or later with the later-flowering plants? The Canola Council of Canada says each field should be assessed individually for risk of infection from sclerotinia stem rot. Early infestations generally cause the greatest yield loss. Scout fields well to determine when the majority
Crops

Chemical Tool Box Topped Up For Potato Growers

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Manitoba potato growers have a handful of new crop protection products in their arsenal for the 2009 season, including new fungicides, seed treatments, herbicides and insecticides. Some are all new for this season while others were registered late last season and saw limited use in the 2008 campaign. The fungicide Revus, from Syngenta, was registered
Crops

Knowledge, New Tools Best For Fighting Bugs On Spuds

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“All the greatest chemistry in the world cannot make up for poor handling of seed.” – TRACY SHINNERS-CARNELLEY Pesticide resistance has grown in the past decade. But on the bright side, new chemistry has kept apace of the bad bugs. “When I started working in potatoes, almost 10 years ago, we didn’t have a lot
Hogs, News

McDonald’s May Reduce Potato Pesticides

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“We just hope there are people who understand all aspects of it.” – GARY SLOIK, KEYSTONE POTATO PRODUCERS ASSOCIATION Amove by the fast-food restaurant company McDonald’s to reduce pesticide use on potatoes for french fries could have serious implications for Manitoba potato growers. Potatoes are such a high-demand crop for pesticides that reducing their use
Crops

Results Mixed When Fungicides Applied To Healthy Corn

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Spraying healthy corn plants with the fungicide Headline to boost yields most often didn’t pay in trials conducted in North Dakota and Manitoba last year. Moreover, excessive use of the fungicide (a strobulrin), which controls disease through just one site of action, could speed up disease resistance to the chemical, Joel Ransom, an extension agronomist

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