Carol from Brenham Texas writes
The manufacturer of Hi-Yield Dormant Spray advises "applying this product in calm weather when rain is not predicted for the next 24 hours will help to ensure that wind or rain does not blow or wash pesticide off the treatment area." You would need to reapply, if rain occured within 24 hours of applying. Please see the label for complete application instructions.
Answer last updated on: 11/22/2020