Removal of the fallen leaves before budbreak will lessen the chances of new infections. Control can also be achieved with the use of fungicide sprays. Among the compounds registered for use in Connecticut are chlorothalonil, thiophanate-methyl, and mancozeb. Consult the label for dosage rates and safety precautions. Leaf rust, Gymnosporangium globosum.
Infected leaves fall prematurely.
Damage to hawthorn is slight. The alternate host is red cedar or juniper species. Among the compounds registered for use in Connecticut are chlorothalonil, fenarimol, triadimefon, and mancozeb. Consult the label for dosage rates and safety precautions. Stem rust, Gymnosporangium clavipes.