What is the best way to treat or prevent fire blight in Asian pears?
Fire Blight on Asian Pears
Certified GKH Gardening Expert
The only treatment is to cut away infected limbs. Good cultural practices, particularly with watering, will help prevent the spread.
This article will help you: https://www.gardeningknowhow.com/plant-problems/disease/fire-blight-remedies-and-symptoms.htm