Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology, Oklahoma State University This season, the three rust diseases were observed in Oklahoma. Stripe rust prevailed in April and was reported in multiple locations in Oklahoma. Stripe rust distribution in Oklahoma and the dates of first detection for each county are described at https://wheat.agpestmonitor.org/stripe-rust/. [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology Oklahoma State University Stripe rust continues to increase in Southwestern Oklahoma (Jackson County and Tillman County). On March 31, Dr. Brett Carver, the wheat breeder at Oklahoma State University (OSU) noted high stripe rust pressure at the OSU research station in Tipton (Tillman County, [ Read More ]

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Meriem Aoun Department of Entomology & Plant Pathology Oklahoma State University On March 19, Tyler Lynch (Agriculturalist Sr, OSU, Department of Plant and Soil Sciences, OSU) brought wheat samples (Figure 1) showing tan spot symptoms from the wheat variety trials at Balko (Beaver County) and Hooker (Texas County), OK. Tyler reported that tan spot incidence [ Read More ]

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Meriem Aoun Department of Entomology & Plant Pathology Oklahoma State University Late February-early March 2024, symptoms of wheat soilborne mosaic virus (SBWMV)/wheat spindle streak mosaic virus (WSSMV) were observed at Oklahoma State University (OSU) Entomology and Plant Pathology farm in Stillwater. The susceptible wheat check ‘Vona’ and other susceptible hard winter wheat breeding lines showed [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology Oklahoma State University As we start the new wheat season in Oklahoma, some disease management strategies can be made this fall to reduce damage later in the season including cultural practices, genetic resistance, and chemical control. Planting date: Much of the winter wheat sown in [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology, Oklahoma State University During the last two weeks of May, high incidence and severity of leaf spotting diseases (mainly spot blotch and Septoria tritici blotch) were observed in multiple wheat fields in Oklahoma (Figure 1). These diseases were favored by the abundant rainfall during [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology, Oklahoma State University Root rots were the primary diseases observed this week (May 8-9) in wheat fields and research trials in Cherokee (Alfalfa County), Alva (Woods County), and Lahoma (Garfield County). Infected plants were stunted, white, with discolored roots and stems. Peeling leaf sheaths [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology Oklahoma State University Wheat tours during the last week of April in southwestern Oklahoma (Tipton, Altus), south-central Oklahoma (Walters), and central Oklahoma (Apache and Chickasha) showed wheat in these areas to be at heading/flowering stages. On April 21, stripe rust was first observed at [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology, Oklahoma State University During the last week of March and in early April, common root rot (caused by Bipolaris sorokiniana) was found in wheat samples from western Oklahoma. These samples were collected from fields in Washita, Kingfisher, Grant, and Ellis counties. A wheat sample [ Read More ]

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Meriem Aoun, Small Grains Pathologist Department of Entomology & Plant Pathology, Oklahoma State University In mid-March, wheat infected with soilborne wheat mosaic virus (SBWMV)/ wheat spindle streak mosaic (WSSMV) were observed in Oklahoma State University (OSU) research trials in Lahoma (Figure 1) and near Stillwater. The much later planting last fall in cooler soils could [ Read More ]

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