Cluster rots pose a significant threat to the wine grape industry, leading to substantial economic losses. This study aimed to determine the performance of multiple treatments targeting cluster rot pathogens and their insect vectors over three years in southwest Michigan. Grape clusters were rated for disease incidence and severity, insects were collected and identified, and pesticide residues were measured on harvested clusters. In 2020, disease incidence decreased significantly when BLAD was applied in combination with the insecticides spinetoram, imidacloprid with beta-cyfluthrin, or zeta-cypermethrin. Similarly, in 2021, clusters treated with cyprodinil plus fludioxonil mixed with insecticides cyclaniliprole, spinosad, zeta-cypermethrin, or imidacloprid plus beta-cyfluthrin significantly reduced disease incidence compared to fungicide alone. Notably, in 2022, treating clusters solely with an insecticide significantly lowered disease incidence compared to treating with only a fungicide. Disease incidence and severity were positively correlated with the number of Drosophila larvae or the adults emerging from clusters collected in the trial. The relationship between disease and insect incidence were significant in 2021 and 2022, highlighting the importance of controlling insect vectors to manage rots. Through chemical residue testing, we identified pesticide programs that resulted in lower pesticide residues on the grapes. Programs that incorporate organic insecticides or sterilants had statistically lower residues than programs with conventional products. Our findings highlight the effectiveness of incorporating insecticides into late-season IPM programs for reducing cluster rots in wine grapes as managing insect vectors mitigate the impact of cluster rots on grape production.

簇腐病对酿酒葡萄产业构成重大威胁，导致巨大的经济损失。本研究旨在确定三年来在密歇根州西南部针对丛集腐烂病原体及其昆虫媒介的多种治疗方法的效果。对葡萄串的发病率和严重程度进行评级，收集和鉴定昆虫，并测量收获的葡萄串上的农药残留量。 2020年，当BLAD与杀虫剂乙基多杀菌素、吡虫啉与高效氟氯氰菊酯或zeta-氯氰菊酯联合使用时，发病率显着下降。同样，在 2021 年，与单独使用杀菌剂相比，用嘧菌环胺加咯菌腈与杀虫剂环虫酰胺、多杀菌素、氯氰菊酯或吡虫啉加β-氟氯氰菊酯混合处理的簇显着降低了发病率。值得注意的是，到 2022 年，与仅使用杀菌剂相比，仅使用杀虫剂处理集群可显着降低疾病发病率。疾病的发生率和严重程度与试验中收集的果蝇幼虫或成虫的数量呈正相关。 2021 年和 2022 年疾病与昆虫发病率之间的关系非常显着，凸显了控制昆虫媒介以控制腐烂的重要性。通过化学残留测试，我们确定了可以降低葡萄农药残留的农药计划。从统计数据来看，含有有机杀虫剂或消毒剂的程序的残留量比传统产品的程序低。 我们的研究结果强调了将杀虫剂纳入晚季病虫害综合防治计划对于减少酿酒葡萄丛腐病的有效性，因为管理昆虫媒介可以减轻丛腐病对葡萄生产的影响。