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New Late Blight Strain Identified: US-25

A new late blight strain type, US-25, has been identified in New York State. To date, this new strain has only been found on tomato. Christine Smart, a professor at Cornell University, has been keeping potato pathologists informed on US-25, which is now known to be Ridomil/mefenoxam-resistant, says Eugenia Banks, a potato specialist with the Ontario Potato Board. US-25 is of the A2 mating type, and under laboratory conditions will infect potato…

Oats: Fall Cover Crop

Oats have been used as a fall cover crop for decades, says Eugenia Banks, a potato specialist with the Ontario Potato Board. The plants can grow up to four feet tall, and winterkill at -8 C.  “For maximum benefit, oats should be planted at least six weeks prior to a frost,” she says. Furthermore, oats establish quickly, suppress weeds, prevent soil erosion, scavenge soil nutrients and improve soil structure, says Banks.  Better soil structure “softens”…

Non-Renewal of Diquat (Reglone) Approval

According to the August 31 bulletin from the U.K.’s Agriculture and Horticulture Development Board (AHDB), Reglone’s days are numbered, says Eugenia Banks, a potato specialist with the Ontario Potato Board. “Loss of the active ingredient Diquat will be a significant blow for European potato growers, as it is an effective desiccant, which helps achieve skin set—such a key requirement for successful storage—and cuts down the risk of disease spread immediately prior to harvest,”…

Primary Residue Tillage: Research Review

With cooperation of research partners, the Agronomy Initiative for Marketable yield (AIM) has been able to complete a research review and resulting extension document relating to the use of primary residue tillage (ie. Synkro/Lemken equipment) in potato production in PEI.  Results of three studies in PEI this decade have been further analyzed and compared to better understand the impacts on potato production and soil from the use of this equipment in comparison…

Place Seed Potatoes Precisely in the Ground

Frankfurt am Main, Germany, August 24, 2018—Planting seed potatoes has developed into a highly complex step in cultivating the crop. In addition to having to handle a comparatively large amount of seed—an average 2.5 tonnes/hectare—farmers have to manage seed bed preparation and fertilizer applications, and the process might also include treatment against seed- and soil-borne pests and terminal ridge formation. However, the basic task of potato planting is still to place the…

Verticillium and Weeds

Verticillium wilt is a major soil-borne disease that can result in yield losses as high as 50 per cent in potatoes. The roots of a potato plant, or other host plant, release compounds that stimulate the germination of Verticillium dahliae microsclerotia, the fungus’s survival structures in the soil. The fungus then grows, penetrates the plant’s roots and spreads up the plant, eventually causing wilting, yellowing and early dying in potatoes. “As Verticillium dahliae completes…

New Spud Smart Webinar: Managing Potato Virus Y

Managing Potato Virus Y Live on: Wednesday, September 5, 1 p.m. EDT Register here: http://spudsmart.com/webinar/ Join our webinar and find out how to manage potato virus Y. During this webinar, participants will learn: How to plan today to manage PVY Management tools PVY What challenges growers are facing with respect to PVY and why New tactics researchers are developing to fight PVY New control product available Speakers:  Mathuresh Singh, director of Agricultural Certification Services…

European Crop Update August 8, 2018

Marketing of potatoes and their respective pricing often depends on what is happening with the crop in other parts of the world and there are some significant events that growers should be aware of. This Crop Update focuses on the European crop and growing conditions with information sourced from World Potato Markets, NEPG, AMI, and AHDB. The North-western European Potato Growers (NEPG) represents the five largest growing countries in Europe. Here is…

Potato Producers Have Eyes On The Future

For a century at least, potatoes have been one of our province’s staple crops. More recently, they’ve become a pillar of southern Alberta’s economy. And now university-based researchers are on hand for support, as producers prepare to grow the industry still further. With a major potato processing plant now under construction in Lethbridge, industry officials predict a jump of nearly 10,000 more acres put into potato crop rotation. On Friday, scientists at…

PMRA to Conduct New Mancozeb Re-Evaluation

August 19, 2018—After a June 2018 decision to restrict the use of Mancozeb on a wide variety of food and feed crops, including tomatoes, the Pest Management Regulatory Agency will conduct a new Mancozeb re-evaluation for stakeholders’ consultation, says Eugenia Banks, a potato specialist with the Ontario Potato Board. The June decision also restricts Mancozeb use on ornamentals, oilseed, and fibre crops, as well as in forests and woodlots. Mancozeb is a…

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