Wheat Article Archive

The Fusarium Head Blight Prediction System is Active

Winter wheat is starting to head. It is important to monitor weather conditions from when wheat is heading until flowering to decide the need for fungicide application to manage Fusarium head blight (FHB). Wheat is most susceptible to FHB around the flowering growth stage because the fungal pathogen that causes it infects wheat through the flower. Rainfall during wheat heading through post flowering is the main risk factor for FHB.

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2017 SDSU Extension Wheat Walks

SDSU Extension will host Wheat Walks in the Pierre and Wall areas on May 25, 2017 and in the Clark area on June 1, 2017. The goal of these events is to provide wheat producers with the latest information to effectively manage their crop. SDSU Extension experts will be on hand at each location, providing expertise in plant pathology, weed control, entomology, soil fertility and agronomic information.

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Tracking Fungal Disease Development with Online Tools

The winter wheat growth stage as of the week of May 15 ranges between jointing and flag leaf emergence. The flag leaf emergence growth stage often coincides with fungal disease development, mainly due the microclimate created by canopy closure. Flag leaf and the leaf below flag leaf should be protected from fungal diseases because these leaves contribute the most to grain yield.

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Aster Leafhoppers in South Dakota Winter Wheat

While scouting winter wheat fields throughout Central and Eastern South Dakota last week, there were several fields that were exhibiting the tell-tale signs of leafhopper feeding injury. After a little additional scouting, it was determined that the fields were infested with large populations of the aster leafhopper (Figure 1). Aster leafhoppers are capable of producing feeding injury that is referred to as “hopper burn.” 

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Which mite is it? Identifying the mites in wheat fields

In South Dakota, the most commonly encountered mites in wheat are wheat curl mite and brown wheat mite. In addition to feeding, wheat curl mites are vectors of Wheat streak mosaic virus. Brown wheat mites can build up large populations and injure wheat through feeding. There are other species of mites that may also be observed in wheat, but generally do not reach populations large enough to cause significant injury. 

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