Scab reaction ratings for spring wheat varieties from the SDSU Extension Crop Performance Testing scab nursery are available online. Examples include Focus, Forefront, Boost, and others. A few scab resistant/tolerant spring wheat varieties are available. Start by selecting a well-adapted, high yielding, scab resistant/tolerant spring wheat variety. While the disease develops later in the season, there are few early-season practices that can help minimize the risk of scab development. The level of scab severity is influenced by the susceptibility of the wheat variety planted and the weather conditions from heading through initial stages of grain development (pollination and early grain-fill). However, infection that results in scab development in wheat heads takes place through the flower.
The scab pathogen, Fusarium graminearum, survives on corn stalks, small grain stubble, and wild grass hosts, therefore inoculum is abundant in most growing seasons. While this type of crop rotation is not generally recommended, economic and logistical challenges sometimes may dictate otherwise.
Originally written with contributions by Emmanuel Byamukama, former SDSU Extension Plant Pathologist.Īre you thinking about planting spring wheat into a previous cornmilo field but are concerned about scab (also known as Fusaruim head blight/FHB) inoculum? Due to current grain prices and other reasons, growers may be considering planting spring wheat into fields that were planted to corn or milo last season.
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