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Recent News

SCLEROTINIA RISK MAP AND RISK CALCULATOR WILL BEGIN JUNE 18TH


June 15, 2017 -

The first Sclerotinia risk map for the 2017 season will be available on June 18th, at three different websites, the NDSU Canola Pathology program, the Northern Canola Growers Association, and the Minnesota Canola Council. The Sclerotinia risk calculator will be available only at the NDSU canola pathology website.

The color coded Risk Map is designed to estimate risk of white mold development; low (green), moderate (yellow) and high (red). Maps will be refreshed on a daily basis beginning next week and can be observed by clicking on the “Risk Map” button. Clicking on any NDAWN station in the map will show the estimated percentage of risk of disease development for that station. This information will help growers make a more informed spraying decision.The Risk Calculator is an interactive tool that gives more precise risk for a specific field by allowing growers to enter important information about their field (such as crop rotation and disease history) into the forecasting model.

Questions and Answers

What conditions favor white mold?

1) Adequate rainfall before flowering that keeps the soil wet.

2) Cool to moderate temperatures during bloom.

3) Long wet periods (rain/heavy dew/fog) during flowering.

4) Dense canola canopies that create a wet microclimate.

How do the risk map and risk calculator help me?

Both tools help you understand your risk for white mold, which can help you decide whether or not to apply a fungicide. We always encourage growers to make the most informed decisions they can using as much information as possible; these tools can help you make those decisions.

When should I start using the risk map and risk calculator? 

The risk map and risk calculator are only applicable when your canola is in bloom. Canola petals are necessary for infection by Sclerotinia ascospores to occur. Thus, canola is only susceptible when it is blooming. From colonized petals, the fungus spreads to healthy green tissues and eventually, large yield-robbing lesions will develop on the stem and branches.

Q. How does the risk map work?

The Sclerotinia risk map is created from weather data collected from NDAWN weather stations to determine if conditions are favorable for ascospore dispersal and disease development. Green, yellow and red areas signify areas of low, medium and high risk.

How does the risk calculator work?

The Sclerotinia risk calculator uses the same data collected from NDAWN, but also takes into account additional data that grower can enter into the site. The additional data adds personalization and precision to Sclerotinia risk forecasts and is especially helpful when fields are in areas of intermediate risk.

What limitations do the risk map and risk calculator have?

1) Canola is only at risk during flowering and consequently the Risk Map and Calculator are only applicable during flowering.

2) The maps are only as good as the data received from NDAWN, and rainfall is notoriously variable. If you know that your fields have had more (or less) rain that the nearby station your risk may be higher (or lower).

Who developed the risk map and risk calculator?

The tools were developed by NDSU canola pathologist Luis del Rio with funding from the Northern Canola Growers Association.

 

Sam Markell

Extension Plant Pathologist, Broad-leaf Crops

Luis del Rio

Canola Pathologist


CANOLA FLEA BEETLES PEAK EMERGENCE


June 8, 2017 -

Crucifer and stripped flea beetles are peaking or just past peak in NC and NE canola growing areas as reported by T.J. Prochaska at NCREC and L. Lubenow at LREC. So, please re-scout any newly emerged canola fields to make sure the insecticide seed treatment is providing enough protection against flea beetle feeding injury, and any fields that have been emerged longer than 21 days since insecticide residue in the seed treatment will be reduced. The action threshold level for a foliar insecticide application is 25% defoliation for an economic return from the cost of that foliar insecticide. Remember to continue checking canola fields until it is larger than the 6-leaf growth stage or flea beetle populations have decreased, usually the end of June. During hot, dry weather, flea beetles populations can increase rapidly, and they are very active moving in and out of canola fields in large numbers. They can consume quickly any unprotected canola plants in a field!


TIMELY DETECTION OF BLACKLEG OF CANOLA IS KEY TO MANAGING THIS DISEASE WITH FUNGICIDES


May 26, 2017 -

The Blackleg fungus is capable of causing yield loss in canola, so an early season fungicide application might be considered for fields at high risk for the disease. High risk scenarios include a short crop rotation, planting the same hybrid multiple times (even if resistant), a history of disease in the field and frequent rains after emergence. Importantly, multiple PG’s (think races) of the pathogen exist, some of which can overcome the genetic resistance in hybrids. Consequently, monitoring even resistant hybrids for disease is important.

The fungus that causes blackleg can survive on canola residues for two to three years and is capable of releasing spores during that period. These spores can be transported by air from neighboring fields or by water splash within the same field. While canola plants are susceptible to blackleg at any stage of their development, usually infections that take place when canola plants have less than four leaves result in economic yield losses. Lesions on cotyledons of susceptible hybrids resemble scalding of tissues with gray to bleached areas (Figure 1A), and under favorable weather conditions, could have pycnidia in them. Pycnidia have the appearance of tiny black dots in the lesions (Figure 1B). Sometimes infected cotyledons may turn yellow faster than normal (Figure 1C), in part due to the action of toxins produced by the pathogen. Blackleg resistant hybrids on the other hand, could create a ring of darkened tissues around the point of infection (Figure 1D) which limits the development of the pathogen and prevents it from reaching the stem tissues.

The protection offered by most seed treatments usually wears off approximately two weeks after emergence of the seedlings. After that, seedlings will be infected if inoculum is available and weather conditions are favorable.

Growers should scout their fields for symptoms of infection starting on the second week after planting and continuing until the plants have passed the four-leaf stage. If blackleg symptoms are present in 20% or more of the seedlings, consider a fungicide application. Growers should keep in mind that most fungicides registered to manage blackleg are more effective when applied at the two to four leaf stage. Fungicide applications made later will not control the pathogen effectively.

A list of fungicides registered for use in canola against blackleg can be found in the 2017 North Dakota Field Crop Plant Disease Management Guide (aka Fungicide Guide or publication PP-622). Remember to read and follow the label if making a fungicide application.

Sam Markell

Extension Plant Pathologist, Broad-leaf Crops

Luis del Rio Mendoza

Canola Pathologist


NCGA’s 18th Annual Golf Tournament


May 25, 2017 -

Register now for the Northern Canola Growers Association Golf Tournament to be held July 20th, 2017 at the Langdon Country Club. Registration for the 4-man best ball tournament is $50/player or $200/team. You may register individually and be placed on a team or register a complete team. Registration fee includes 9 holes of golf, a golf cart, refreshments, and supper at the club house. Prizes will be awarded. Registration for the Langdon tournament is limited to the first 132 players, so register early! This tournament is made possible by the support of our industry sponsors.

If you would like to register for this year’s tournament please fill out the registration form and return along with payment to:

Northern Canola Growers Association
125 Slate Drive Suite #4
Bismarck, ND 58503

Or if you would like to pay online visit: https://squareup.com/store/NCGA

If you have any questions call us at #701-223-4124.

 


Mission Statement

CanolaPlantThe mission of the Northern Canola Growers Association is to promote and encourage the establishment and maintenance of conditions favorable to the production, marketing, processing, research, and use of canola. To promote efficient production through farmer education, public and private research, labeling and registration of crop protection products; to promote uniform seed and product standards; and to work to develop and implement agriculture policies that will enhance development of the industry.