Fusarium head blight (FHB), caused mainly by Fusarium graminearum, can result in devastating economic losses in small grain cereal crops. Management of FHB is by a combination of strategies and tactics including cultivar resistance, fungicide application at anthesis, and cultural practices such as crop rotation, tillage, and irrigation management. This study evaluated, under field conditions, the effects of fungicide chemical class (triazole versus strobilurin), fungicide application timing, and environment on FHB and its associated mycotoxin deoxynivalenol (DON). A moderately resistant hard red winter wheat cultivar, Overland, consistently had lower levels of FHB index (= index), Fusarium-damaged kernels (FDK), and DON, and higher yield compared to the susceptible hard red winter wheat cultivar Overley. The most effective fungicide treatment in reducing FHB, FDK, DON, and yield loss was Prosaro® (prothioconazole + tebuconazole) applied at early anthesis (BBCH 61; hereafter referred to as anthesis). Application of Prosaro 6 days post anthesis (DPA) achieved a slightly lower but comparable efficacy to that achieved by the anthesis application. Application of Prosaro at 12 DPA was least effective. The strobilurin fungicide Headline® (pyraclostrobin) was less effective than Prosaro in controlling FHB, FDK, and DON. In both cultivars, index, FDK, and DON were higher and yield was lower under irrigated compared to rain-fed conditions. These differences were more pronounced in a wet compared to a relatively dry growing season. The results from this study indicate that effective management of FHB can be achieved by combining cultivar resistance with a triazole fungicide applied at anthesis, and the window of fungicide application can be extended by up to 6 days post anthesis.

主要由禾谷镰刀菌引起的镰刀菌枯萎病（FHB）可能导致小谷类谷物作物遭受毁灭性的​​经济损失。FHB的管理是通过各种策略和策略的组合，包括对品种的抗性，在花期施用杀真菌剂以及诸如轮作，耕作和灌溉管理等文化习俗。这项研究在田间条件下评估了杀菌剂化学类别（三唑对strobilururin），杀菌剂的施用时机和环境对FHB及其相关真菌毒素脱氧雪腐酚（DON）的影响。中等抗性的硬红冬小麦品种陆上（Overland）的FHB指数（=指数），镰孢属（Fusarium）始终较低与易感的硬红冬小麦品种Overley相比，玉米籽粒（FDK）和DON受损，且单产更高。减少FHB，FDK，DON和产量损失的最有效的杀菌剂处理是在早期花期（BBCH 61；以下称为花期）施用的Prosaro®（Prothioconazole + tebuconazole）。花后6天（DPA）施用Prosaro与使用花药相比，疗效略低，但具有可比性。在12 DPA下应用Prosaro效果最差。在控制FHB，FDK和DON方面，Strobilururin杀菌剂Headline®（吡菌酯）的效果不如Prosaro。与雨养相比，在灌溉条件下，两个品种的指数，FDK和DON都较高，而产量较低。与相对干燥的生长季节相比，这些差异在潮湿的季节更为明显。