Witherspoon Spray Formula
We suggest spraying your roses with this mixture April-October
- 1 gallon water
- 5 teaspoons Captan 50%
- 2.5 teaspoons Thiomyl 50%
- 2 tablespoons Bonide Systemic Insecticide
- 0.5 teaspoons Spreader Sticker
Mix well and spray before temperatures reach 86°
Mix fresh batch each time you spray and spray every 7-10 days.
Spray for insects only when necessary.
Dormant Oil Formula
- 1 gallon water
- 3 tablespoons Dormant Oil
- 2.25 teaspoons Fungonil
- 0.5 teaspoons Spreader Sticker
Mix well and spray on bushes and the mulch surrounding the roses.
Wait 2 weeks and apply for a second time if blackspot, downy mildew, or spider mites were an issue during the previous growing season.