Blueberry is an increasingly important crop in Florida. Anthracnose fruit rot (AFR), caused mostly by Colletotrichum gloeosporioides, is favored by long wetness periods and temperatures from 15 to 27°C. Currently, the model in the Strawberry Advisory System (StAS) guides fungicide applications targeting strawberry AFR. Given the similarity between blueberry and strawberry AFR, we hypothesized that the model used in StAS could be used in a decision support system (DSS) built for blueberry AFR. There is no information on inhibition posed by fungicides on C. gloeosporioides isolates from blueberry. Our objectives were to demonstrate that the model used in the StAS could be used for blueberry AFR management in Florida and to assess the sensitivity of isolates to fungicides. Four trials were undertaken in blueberry fields in Florida during two seasons to compare the effectiveness of fungicide applications according to the model with that of the growers’ standard calendar. Sensitivity of blueberry C. gloeosporioides isolates to azoxystrobin, benzovindiflupyr, penthiopyrad, pydiflumetofen, boscalid, thiophanate-methyl, fluazinam, and fludioxonil was evaluated. AFR incidence and yield were compared between treatments. Following recommendations from the model resulted in disease control as effective as the standard program and in some cases with fewer applications. All isolates were sensitive to benzovindiflupyr, penthiopyrad, fluazinam, and fludioxonil. Low frequency of in vitro inhibition of isolates by azoxystrobin, pydiflumetofen, boscalid, and thiophanate-methyl should raise concern about fungicide resistance. Our results indicate that the model used in StAS could be used in a DSS to help Florida growers to manage AFR in blueberry.

蓝莓是佛罗里达州越来越重要的作物。炭疽病果实腐烂 (AFR) 主要由胶孢炭疽病菌引起，受长潮湿期和 15 至 27°C 的温度影响。目前，草莓咨询系统 (StAS) 中的模型指导针对草莓 AFR 的杀菌剂应用。鉴于蓝莓和草莓 AFR 之间的相似性，我们假设 StAS 中使用的模型可用于为蓝莓 AFR 构建的决策支持系统 (DSS)。没有关于杀菌剂对球孢子菌的抑制作用的信息从蓝莓中分离。我们的目标是证明 StAS 中使用的模型可用于佛罗里达州的蓝莓 AFR 管理，并评估分离株对杀菌剂的敏感性。在两个季节期间在佛罗里达州的蓝莓田中进行了四项试验，以比较根据模型和种植者标准日历施用杀菌剂的有效性。蓝莓C. gloeosporioides 的敏感性对嘧菌酯、苯并氟啶虫酯、吡噻菌胺、嘧菌酯、啶酰菌胺、甲基硫菌灵、氟啶胺和氟啶虫胺的分离株进行了评价。比较处理之间的 AFR 发生率和产量。遵循模型的建议导致疾病控制与标准程序一样有效，并且在某些情况下应用更少。所有分离株均对苯并氟啶、吡噻菌胺、氟啶胺和氟啶虫胺敏感。嘧菌酯、嘧菌酯、啶酰菌胺和甲基硫菌灵对分离株的体外抑制频率较低，应引起对杀菌剂耐药性的关注。我们的结果表明，StAS 中使用的模型可用于 DSS，以帮助佛罗里达种植者管理蓝莓中的 AFR。