![]() The FHB fungus can also enter through wounds caused by hail, birds or insects. FHB infection is most likely to occur during July when the florets are open during flowering, allowing spores to come into contact with the floret. Spores are spread by rain-splash and wind and can come in contact with above ground parts of cereals. Temperatures favouring infection range from 16 to 30☌, with the optimum range for F. Precipitation or high humidity for at least 12 hours is required for spore germination and infection. This indicates that disease inoculum on crop residue may serve as a source for head infections later in the season. ![]() Studies have shown that many of the Fusarium fungi found in kernels from diseased heads of wheat and barley were also found in the subcrown internodes of cereal plants collected from the same field. Some Fusarium species can also survive on roots of other crops, including pulses (as in field pea in the photo below) and oilseeds. The fungi overwinter as spores or mycelium on seed and crop residue. Multiple studies in Canada and the United States indicate that while 15-ADON used to be the dominant chemotype, 3-ADON, has been increasing for the last 20 years.ĭisease Cycle and Conditions Required for Infection Fusarium root rot on field peaįusarium fungi can survive as saprophytes or act as pathogens on various crops. Changes in the pathogen population also play a role in the incidence of disease. Warming weather patterns, more intensive farming practices and the movement of infected seed create the potential for increases in FHB. graminearum population, there are two chemotypes known as 15-ADON and 3-ADON, the latter of which is more aggressive and produces a mycotoxin called deoxynivalenol (DON). graminearum, which poses a greater risk. The most common species detected in the survey are: Survey results indicate that FHB is present in most regions of the province. Fusarium head blight in SaskatchewanĪnnual disease surveys are conducted in Saskatchewan to determine problem areas and to monitor its spread. Further economic losses occur when the percentage of FDK in a sample exceeds grading tolerances. These kernels are light weight and may be lost during combining or seed cleaning. ![]() Symptoms may occur over the entire head or on just a few spikelets and can result in a poor yield and the formation of fusarium damaged kernels (FDK), also known as "tombstone kernels". It is important that producers are familiar with this potentially damaging disease and incorporate management practices to reduce FHB development in their crops.įusarium sporulation and cereal head infection is favoured by moist, warm conditions during flowering. Further losses to producers have occurred because of restricted crop rotations, limited variety selection, cost of control measures, as well as reduced marketing opportunities. In Saskatchewan, durum wheat, spring wheat, and barley are most affected by this disease.įHB results in a reduction in yield, grade and end-use quality. If you have any questions about Google™ Translate, please visit: Google™ Translate FAQs.įusarium head blight (FHB), also known as scab, is a fungal disease of small grain cereals including wheat, barley, oats, rye, corn, triticale, canary seed and some forage grasses. Government of Saskatchewan is not responsible for any damage or issues that may possibly result from using translated website content. Some files or items cannot be translated, including graphs, photos and other file formats such as portable document formats (PDFs).Īny person or entities that rely on information obtained from the system does so at his or her own risk. The Government of Saskatchewan does not warrant the accuracy, reliability or timeliness of any information translated by this system. The translation should not be considered exact, and may include incorrect or offensive language. Software-based translations do not approach the fluency of a native speaker or possess the skill of a professional translator. Translations are made available to increase access to Government of Saskatchewan content for populations whose first language is not English. Google™ Translate is a free online language translation service that can translate text and web pages into different languages. Where an official translation is not available, Google™ Translate can be used. The home page for French-language content on this site can be found at: These translations are identified by a yellow box in the right or left rail that resembles the link below. A number of pages on the Government of Saskatchewan's website have been professionally translated in French.
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