I have needle cast on my evergreen trees. What do I spray on them?
Hennepin County Minnesota
Treatment is rarely necessary in the home landscape. It is important to know sprays only protect new needles and does not cure infected needles. https://extension.umd.edu/hgic/evergreen-needle-cast-diseases-trees-and-shrubs To identify the kind of needle cast if you haven’t done so can be done at the plant diagnostic lab. https://pdc.umn.edu/submit-sample https://hortnews.extension.iastate.edu/2007/4-18/conifer.html Treatment https://hortnews.extension.iastate.edu/2007/4-18/conifer.html