You may have experienced a multi-day infection period and more than 2” inches of rain. This may make you feel that coverage was lost during the infection period, and you may be considering a curative or “kickback” application. Be careful with curative applications as it is one of two practices known to contribute to the selection of resistance. This is due to the fact that apple scab infection may be in the tissue protected from most of the material on the plants surface. This limits the amount of fungicide reaching the fungus, which effectively reduced the rate such that members with natural resistance might survive predominate in the orchard population. If you decide to go for a curative application, one of the best materials we’ve found is Dodine marketed as Syllit FL. Sadly, this probably should not be used as it has no specific curative labeling, and it can’t be put on after petal fall. If you have rust diseases in the area, and you want to make an curative application, select aGroup 3 like Inspire Super (48 hour curative option on the label) and include 3lbs of any formulation Mancozeb 75%. If you don’t have rust concerns, the same would still work, but Aprovia could be used (48-hour curative option on the label). You may want to even add some Regulaid to better uptake by the plant.