Answer:

Cornerstone Plus Herbicide is just a generic brand of Roundup and should not be sprayed on anything you don't want to kill or harm in the yard or landscape areas. If you have brown leaves on your ligustrum, you would need to prune and remove them and then address whatever issue is causing the browning of the leaves. This could be insects, disease, or nutrition/fertilizing deficiencies, and you'd want to have your plants assessed by someone locally if you are not sure what the cause of the damage to your plants would be. 

Answer last updated on: 04/17/2023