SureGuard Herbicide is not for use around any edible crops and must be applied very carefully around non bearing trees to not harm them. We are not able to advise on what level of damage could potentially occur to the pear trees if treated. We would recommend speaking to someone at the manufacturer of the product to see if they have any advice they can give to help save the tree. You can reach Valent at 800-682-5368.
Per the product label on page 13 under the USE PRECAUTIONS section, SureGuard Herbicide has limited potential for lateral movement on level terrain, but can potentially move down slope after excessive rainfall and affect sensitive turf species such as bentgrass and Poa trivialis. It does not list bentgrass as one of the weeds/grasses this product will control.
