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POSTERS: Cultural Control II

P-156 - Impact of Cultivar Selection on Barely Yellow Dwarf in Alabama Wheat

Tuesday, August 5, 2025
9:30 AM - 10:15 AM HST
Location: Exhibit Hall 3
Abstract Text: Barley Yellow Dwarf (BYD) is one of the most economically important diseases of wheat in United States as it can cause yield losses of up to 25%. BYD is caused by two aphid-transmitted viruses; Barley yellow dwarf virus (BYDV) and Cereal yellow dwarf virus (CYDV). BYD is largely managed by planting tolerant varieties; however, the lineup of commercial varieties is constantly changing requiring evaluation. The goal of this study was to assess the impact of BYD on variety performance. In 2023 and 2024, 50 and 53 wheat varieties, respectively, were planted in small plot research trials at research units across Alabama and rated for disease prior to soft-dough stage. In 2023, the highest BYD incidence was observed in ‘GA Gore’ in south and ‘26R94’ in central Alabama. In contrast, in 2024, highest BYD incidence was observed in ‘USG 2673’ in south, ‘GA Gore’ and AgriMAXX 492’ in central, and ‘USG 3354’ and ‘Jamestown’ in north Alabama. At one southern location, there was a negative correlation between BYD and yield. In 2023, the highest yields were recorded by ‘AGS 4043’ in south, ‘USG 3783’ in central, and ‘KWS397’ in north Alabama. In 2024, yield was significantly higher for ‘DynaGro 9332’, two experimental lines, and ‘DynaGro Plantation’ in south Alabama. ‘DynaGro Plantation’ also had the highest yields in central Alabama, whereas ‘#Bingo’ had the highest yield in north Alabama. Additional data from 2025 may also be presented. These results indicate that producers should select varieties based on growing conditions and disease history in their region to maximize yield.