Non-Chemical Management
- Plant resistant species or varieties such as Crataegus crus-galli, C. flava, C. intricata, C. laevigata 'Autumn Glory', C. phaenopyrum, C. pruinosa, or C. viridis 'Winter King'.
- Remove alternate hosts (junipers) from the area when practical.
- Prune and destroy diseased leaves and branches on hawthorns in summer before sporulation. Prune out galls on junipers before sporulation in the spring.
- Avoid overhead watering.
- Space plantings and prune to improve air circulation and reduce humidity.
Select non-chemical management options as your first choice!