Saving a Borer-Infested Mulberry: Systemic and Trunk Spray Options

Two Effective Approaches

With one-third of the canopy already leafless, your mulberry needs immediate action.

Option 1: Soil-Applied Systemic

Bayer Advanced Tree & Shrub Insect Control (imidacloprid) drenched around the base moves up the xylem and kills borers as they feed. Also fertilize with 10-10-10 at 1 lb per inch of trunk diameter to boost vigor.

Option 2: Trunk Spray

Spray the trunk and scaffold branches with Onyx or Merit (both penetrate bark). A standard pump-up sprayer works if you can reach the lower trunk.

Both Methods Work

Choose based on equipment and access. Combining a soil drench with a trunk spray gives the best odds of saving the tree.