Google Translate Disclaimer

A number of pages on the Government of Saskatchewan`s web site have been professionally translated in French. These translations are identified by a yellow text box that resembles the link below and can be found in the right hand rail of the page. The home page for French-language content on this site can be found here:

Renseignements en Français

Where an official translation is not available, Google™ Translate can be used. Google™ Translate is a free online language translation service that can translate text and web pages into different languages. Translations are made available to increase access to Government of Saskatchewan content for populations whose first language is not English.

The results of software-based translation do not approach the fluency of a native speaker or possess the skill of a professional translator. The translation should not be considered exact, and may include incorrect or offensive language Government of Saskatchewan does not warrant the accuracy, reliability or timeliness of any information translated by this system. Some files or items cannot be translated, including graphs, photos, and other file formats such as portable document formats (PDFs).

Any person or entities that rely on information obtained from the system does so at his or her own risk. Government of Saskatchewan is not responsible for any damage or issues that may possibly result from using translated website content. If you have any questions about Google™ Translate, please visit: Google™ Translate FAQs.

Managing FHB risk for 2017

By: Mitchell Japp, MSc, PAg, Provincial Specialist, Cereal Crops

Fusarium head blight (FHB) devastated many durum and wheat crops in 2016. Barley, oats, rye and canaryseed were also affected. Growers have been challenged over the winter to market grain with fusarium-damaged kernels and grain containing mycotoxins like DON (deoxynivalenol, also known as vomitoxin). Growers want to avoid a repeat of 2016, but may now be wondering if a fungicide application will be economical.

Unfortunately, with FHB, clear answers are difficult to come by and management needs to go beyond fungicide applications.

At this time of year, we are past making management decisions such as crop rotation and selecting varieties resistant to FHB. Management is now focused on using fungicides in conjunction with risk maps.

FHB is a mono-cyclic disease, so once symptoms are present it is too late to treat with a fungicide. Fungicide application decisions must be made before infection occurs, to coincide with the growth stage when the crop is most susceptible to infection – anthesis (flowering).

Fungicides are not applied for free, so they should be used when there will be a value in using them. Fortunately, there are tools available to help make those decisions. The Saskatchewan Wheat Development Commission works with Weather Innovations Network to deliver FHB risk maps for spring and winter wheat in June and July each year. These maps should be referenced daily as crops are at or approaching the susceptible stage. The risk maps should contribute to determining if a fungicide application is warranted.

Additional factors include local weather conditions that can be missed on a large-scale map. Fusarium spores need 12 hours of high humidity to germinate and infect.

Because FHB was so prevalent in 2016, the disease will be present in most areas of Saskatchewan. This increases the risk, but so far the weather conditions for most of the province have indicated low risk, with some areas showing medium risk.

Understanding the risk is the first step, but then the cost of the fungicide and application should be balanced with the anticipated crop yield and value of the crop. These calculations should be done prior to the crop reaching flowering, so that you can quickly make a decision to make targeted and timely applications that fit the narrow application window.

If the decision is made to spray, the fungicide application should maximize the use of the fungicide. Best practices include using angled spray nozzles, coarse spray, low boom heights, low wind conditions, high water volumes and slower sprayer speeds. FHB fungicides are only rated for suppression, so it is important to make the most of them.

Additional resources:

Sprayers101 – Fungicide application in cereal, pulse and oilseed crops

Think Wheat – Small spray technology update

We need your feedback to improve saskatchewan.ca. Help us improve