News
Potatoes in Flooded Fields
The recent excessive rainfall in potato fields can cause anaerobic conditions, making potatoes susceptible to bacterial soft rot, lenticels openings, and blackheart among other problems. This article discusses some of these issues that may occur from water-logged soils.
Blightline June 22, 2016
No late blight has been reported in ND or MN. Late blight has been reported in central Washington. Late blight severity values are beginning to accumulate in northern and eastern ND and northwestern MN due to the recent heavy rains, and are nearing the threshold value of 15. At this value, the accumulated weather conditions are favorable for late blight infection if inoculum is present.
Blightline June 10
No late blight has been reported in ND or MN. Late blight severity values are beginning to accumulate in northern and eastern ND and northwestern MN.
Blightline June 3
No late blight has been reported in ND or MN. Late blight severity values are beginning to accumulate in northern and eastern ND and northwestern MN. Late has been reported in Walla Walla County in southern Washington on June 1. It is not too early to remind the potato community to prepare for late blight. We did have late bight in central MN last year, and infected seed could from other areas could act as a source of inoculum for our region. Continuing wet weather will provide conditions favorable for late blight if inoculum is present.
Blightline June 1
As you all know, potato planting and emergence are ahead of normal and off to a good start. Most of the potato acreage is planted, and much of it is already emerge. The recent wet weather will favor late blight from infected seed, and also favor both bacterial seed decay and Rhizoctonia stem canker of the emerging sprouts. It is not too early to remind the potato community to prepare for late blight, and even though we did not have late blight in our area the past three years, infected seed could from other areas could act as a source of inoculum. The risk of late blight now is low, but continuing wet weather during the season will provide conditions favorable for late blight if inoculum is present. Severity values are beginning to acuclulate in northern and eastern ND due to the recent rains.
Dickeya: A Scottish, UK and European Perspective - Focus on Potato
Blackleg, a disease that has had little impact on potato production in North America over the years is showing worrying signs in recent times that it’s on the move. It’s a disease that has plagued potato production in Europe for decades and can be caused by a number of different bacteria Dickeya and Pectobacterium species. Potatoes producers up and down the East Coast are rightly concerned and this presentation should give practitioners and growers an overview of the European experience of the disease, update them on ongoing research and explain what the European authorities and industry are doing to combat the problem. By the end of this presentation, the practitioner should have a better understanding of the disease, the pathogens involved and current advice on disease management practice.
Integrated Late Blight Management - Focus on Potato
Late blight is a potentially destructive disease of potato and tomato crops worldwide. While the disease has been studied by many for over a century, changes within the Phytophthora infestans pathogen population have required further in depth investigation for management. From 2009 to the current, a group of newly identified genotypes/clonal lineages/strains of the pathogen were identified, with US-23 becoming most predominant in both tomato and potato production areas of the continental U.S. This presentation will offer new information on the characterization of US-23 and other newer clonal lineages as it pertains to pathogen persistence and management. Further, a process for integrated late blight management, established for Wisconsin, will be shared to aid practitioners in understanding critical concepts of the pathogen and fungicides to enhance overall disease management.
Irrigated Cultivar Trial 2015
As part of a North Dakota Specialty Crop Block grant we tested ten different cultivars for their agronomic performance. This trial was planted at the irrigated research site near Inkster, ND.
Understanding and Managing Blemish Problems in Fresh Market Potato
Blemishes are a big problem fresh market potato growers often face. They can cause 15% or more of potatoes to be culled or cause rejected loads. Smooth-skinned tubers in particular are especially vulnerable to blemishes because they are easily observed. This work evaluated blemishes on tubers from a survey of potatoes collected from potato growers, and evaluated the effects of fungicides on blemishes.
2016 NDSU Pest Management Guides Available
The 2016 NDSU Pest Management Guides are now available. These can be found under the "Pest Management Guides" link on the left side of the website or by clicking the link below. Or you can download the NDSU Pest Management App for Pest Management information.
Blemishes of Table Potatoes: Common Biotic Causes by Jacquie van der Waals, PhD
Potato tubers are affected by a number of blemishes, which can cause severe economic losses, in terms of rejection of seed batches, yield losses, downgrading of potatoes on the market, or rejection of processing potatoes. Despite the fact that many blemishes are merely cosmetic in nature, the demand by consumers for washed potatoes has exacerbated the problem of rejection of blemished tubers. Tuber blemishes are broadly classified as typical or atypical. Typical blemishes have known causes, for example pests, pathogens or specific abiotic factors; while the cause(s) of atypical blemishes have yet to be determined. Correct diagnosis of a tuber blemish is important in management of the disease and prevention of future occurrences of the blemish. This presentation covers the causal agents, symptoms and management of the most common typical tuber blemishes with biotic causes, and can serve as a guide for growers and others in the potato industry to help with identification of these blemishes.
National Fry Processor Trials
2015 Potato Cultivars tested at East Grand Forks, MN in 2015. This article was put together by the United States Potato Board
Minnesota Area II and NPPGA Research Reports
Potato research reports from research conducted in Minnesota and North Dakota by researchers at North Dakota State University and University of Minnesota. The research covers a variety of topics on potato production.
Minnesota Area II Potato Growers 25th Annual Educational Workshop
You are invited to attend the 25th Annual Potato Workshop on Tuesday, March 1st 2016. This workshop gives us the opportunity to get together, learn and share ideas. We feel this program will be useful to everyone in the potato industry. We hope to see you there.
NDSU / U of M Potato Scout School Registration
The NDSU / U of M International Potato Scout School will be held on February 18, 2016 at the Alerus Center in Grand Forks, ND. We will cover basic pest identification and answer any other questions you may have.
Getting the Most Out of Lorox
Presentation to the Manitoba potato growers about the use of linuron (Lorox or Linex) in potato production. This work is show how linuron can be used in a preemergence weed control program in potato to control weeds and improve marketable yield.
Research Reporting Conference & International Crop Expo
The NPPGA Research Reporting Conference & International Crop Expo will be held on February 16-18, 2016 at the Alerus Center in Grand Forks, ND. CEU credits will be available for many of the talks. We look forward to seeing you at the show.
Glyphsoate and Dicamba Drift Problmes in Potatoes
The introduction of crops resistant to glyphosate and dicamba is concerning for potato growers. These herbicides can reduce yield and quality and cause problems in tubers sold for seed. The purpose of this study is to determine the effects of glyphosate plus dicamba on plant injury, marketable yield, and the effects on seed tubers planted the following year. Glyphosate in seed potato can cause a delay in emergence, multiple stems, and malformed leaves. Dicamba can cause a delay in emergence and malformed foliage. Protect potatoes by talking to neighbors, dedicating a sprayer for potatoes, planting borders, and scouting field regularly.
Pythium Leak of Potato by Lyndon Porter, PhD
This presentation provides a synopsis of Pythium leak of potato. Growers, consultants, students and people interested in the potato industry will come to understand the pathogen, disease symptoms, epidemiology and management strategies associated with this worldwide disease of potato. Pythium leak can be a major storage disease and this presentation will discuss practices to limit issues in storage facilities. Development of resistance by the pathogen in the US to the fungicide metalaxyl will be discussed and its implications.
North Dakota Fresh Market Potato Cultivar/Selection Trial Results for 2015
Potato growers continually are looking for the next potato cultivar that provides high yield and good quality, and can be produced sustainably. Potato breeders continue to develop new potato cultivars with many desirable genetic traits. These traits may include increased yield potential, resistance to diseases, better tuber size profile, improved skin color, drought tolerance and enhanced nutrient-use efficiency. The NDSU Potato Extension Agronomy program has produced this data for red- and yellow-skinned potato cultivars/selections to assist potato growers in selecting new cultivars to produce on their farms.
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