F6123 is a fungicide being developed by FMC for the control of diseases on environmental horticulture crops such as anthracnose (Colletotrichum spp.), powdery mildew (Erysiphe spp.), black spot (Diplocarpon rosae), rusts (Coleosporium, Phragmidium, Puccinia, Uromyces spp.), leaf spots (Alternaria, Cercospora, Cylindrocladium, Sclerotinia Septoria spp.) and other foliar diseases. Although not yet available in the marketplace, F6123 was registered for use with EPA since November 20, 2019. The IR-4 Project completed 52 crop safety trials on 17 environmental horticulture plant species or genera from 2019 to 2021. In these trials, F6123 was applied either as a foliar spray or as a soil drench. Four genera or species (two foliar, two drench) exhibited minimal or no injury after foliar and drench applications in a minimum of three trials for each crop; these can be added to a list of tolerant plants in the new label for this active ingredient.
The fifteen remaining species or genera treated with foliar sprays exhibited minimal or no injury in the limited number of trials (one or two) for each crop.
Out of the thirteen remaining species or genera treated with a drench application, eight exhibited moderate to severe negative impacts. The other five exhibited minimal or no injury in the limited number of trials (one or two) for each crop.