Start Date: May 06, 2014
End Date: May 05, 2016
Project 1: The nursery will be located in Rosemount, Minnesota, and will be inoculated with F. graminearum macroconidia and mist-irrigated. This research is needed because increasing the efficiency of individual breeding programs to develop FHB resistant varieties and developing effective FHB resistance through transgenics are major strategies of the USWBSI for reducing the impact of FHB in wheat and barley. Project 2: Plots will be established on university research farms or in farmers’ fields in areas previously planted with a crop that is representative of the typical cropping sequence of each location, and managed according to the standard agronomic practices for each grain class and location. FHB, DON, FDK, yield, and test weight data will be collected in all trials and analyzed to determine the effect of fungicide and resistance. The untreated check and the anthesis treatment will serve as references for estimating percent control of FHB, DON and FDK for each of the post-anthesis applications. Data from all trials will be compiled and a technique called meta-analysis will be used to conduct a quantitative synthesis of the results. Project 3: Mist-irrigation systems programmed to run on different schedules will be used. Similar experiments will be conducted at three locations (North Carolina, Minnesota, and Ohio), two of these representing soft red winter wheat (SRWW) regions with distinct weather patterns, and the third representing a hard red spring wheat-producing region with in-season weather conditions considerably different from those at the SRWW locations. At each location and beginning seven days prior to anthesis, four mist-irrigation regimens will be used to enhance inoculum production, infection, and FHB developent.