Wendy from Near Scranton Pa writes
To treat for Rhizosphaera Needle Cast you could use Docket DF. You will need to use 5 lbs of Docket DF per 100 gallons of water (1.25 lbs of Docket DF per 25 gallons of water) for Rhizosphaera Needlecast on spruce trees.
Answer last updated on: 10/24/2013