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Chemical Tool Box Topped Up For Potato Growers

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 last September, and is touted for late blight control, along with control for several other important foliar diseases for potatoes and other vegetable crops. It’s a Group 40 reduced-risk formulation that contains the active ingredient mandipropamid. The product was available in late 2008, but limited supplies meant little of it was seen in Canada until this season.


Confine is a Group 33 fungicide that comes from Minnesota’s Winfield Solutions, but is represented here by the Agronomy Company of Canada. It’s a phosphor ic acid-based product that’s intended for suppression of late blight and pink rot on harvested tubers. Industry watchers say there’s the expectation the product will also suppress other storage diseases such as early blight and silver scurf, which they note are not yet on the product label.

Bayer CropScience has picked up registration for Titan a new seed-piece treatment to suppress damage caused by wireworm in potato crops. Bayer says the Group 4 liquid clothiandin product will be avai lable for the 2009 season as the only seed-piece treatment registered for suppression of wireworm. Wireworm, the larval stage of click beetles, are attracted to carbon dioxide that’s emitted as seed-piece tubers begin decomposing. But when wireworm ingest Titan, they stop feeding, the company said. The company has also applied to have the product extended to above-ground applications, with a decision hoped for sometime this season.


Matador, a Group 3 insecticide from Syngenta, has been approved for use on potato crops to control wireworm on the crop canopy. The product is a fast-acting stomach and contact insecticide that is effective against a broad spectrum of foliar pests, but has no fumigant or systemic activity. The company’s literature says best results are obtained “when applied against the early development stages of the pest as determined by regular monitoring.”

Surround is a unique product from NovaSource that forms a barrier film to prevent feeding by pests. It has been widely used on apples and other pome fruits and tree nuts. The Pest Management Regulatory Agency (PMRA) recently granted minor use label expansion for the product’s use to limit leafhopper damage on other crops, including potatoes. The company says the expansion comes in part because the product is considered to be a lower-risk option to control damage from these pests.


Silencer is a new wide-spectrum pyrethroid insecticide, registered for use on a wide range of crops, including vegetable crops such as potatoes. Manufacturer MANA Canada says the product contains the same active ingredient as Syngenta’s Matador and “delivers the same dependable insect control, but at a value pricing.” It controls a wide range of common insects, including Colorado potato beetle.

Liquid Maxim from Syngenta is a Group 12 fungicide seed-piece treatment with the active ingredient fludioxonil. It controls major seed-borne potato diesease such as black scurf, stem and stolon canker, silver scurf and fusarium dry rot. It does not control bacterial diseases present within the seed.

Valent Canada’s Chateau is a Group 14 flumioxazin herbicide that offers growers a new management option for weeds resistant to Group 2 and Group 5 herbicides. The active ingredient is being used in a number of new products, with Chateau being the product that will provide potato growers with residual weed control, when tank mixed with glyphosate.

About the author


Gord Gilmour

Gord Gilmour is Editor of the Manitoba Co-operator.



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