Arbotect 20-S Fungicide, Timing
Dutch Elm Disease: Applications can be made after leaves have fully enlarged, which coincides with seed drop in the spring. Treatments may continue through the growing season until fall color begins.
Sycamore Anthracnose: Applications can be made mid to late summer until to fall color begins. Do not treat sycamores with thin, partial canopies during the early part of the growing season.