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Abstract：
Fusarium crown rot (FCR) on wheat is a soil-borne disease that affects the yield and quality of the produce. In 2020, 297 Fusarium pseudograminearum isolates were isolated from diseased FCR wheat samples from eight regional areas across Hebei Province in China. Baseline sensitivity of F. pseudograminearum to fludioxonil (0.0613 ± 0.0347 μg/mL) and tebuconazole (0.2328 ± 0.0840 μg/mL) were constructed based on the in vitro tests of 71 and 83 isolates, respectively. The resistance index analysis showed no resistance isolate to fludioxonil but two low-resistance isolates to tebuconazole in 2020. There was an increased frequency of resistant isolates from 2021 to 2022 based on the baseline sensitivity for tebuconazole. There was no cross-resistance between fludioxonil and tebuconazole. This study provides a significant theoretical and practical basis for monitoring the resistance of F. pseudograminearum to fungicides, especially the control of FCR.
摘要：
小麦上的镰刀菌冠腐病（FCR）是一种土壤传播的疾病，会影响产品的产量和质量。2020年，从中国河北省八个地区的患病FCR小麦样品中分离出297株假镰刀菌。基于71个和83个分离株的体外试验，构建了假赤霉病菌对氟二恶菌(0.0613±0.0347μg/mL)和戊唑醇(0.2328±0.0840μg/mL)的基线敏感性，分别。抗性指数分析显示，在2020年，没有对氟二恶英的抗性分离株，但有两个对戊唑醇的低抗性分离株。根据对戊唑醇的基线敏感性，从2021年到2022年，耐药分离株的频率增加。氟二恶英和戊唑醇之间没有交叉耐药性。本研究为监测假赤霉病菌对杀菌剂的抗性提供了重要的理论和实践依据。尤其是FCR的控制。
