These techniques avoid exposing soils on steep slopes to excessive erosion. The final treatment is an application of Roundup to kill fescue. Return to List Roundup Specifications Roundup is the most effective herbicide, especially when applied to vigorously growing fescue, following an initial treatment. Fescue should be sprayed when leaves are at least 8-12 inches tall. Do not apply if rain is expected l within 6 hours.
Timing is important in fall herbicide application.
If desirable warm-season grasses or forbs exist in the stand, herbicides should be applied after frost has caused desirable plants to become dormant. If few desirable plants exist in the stand, treatment should occur during the second week of October or during vigorous growth when fescue leaves are 8- 12 inches tall. This Roundup formulation has been the most successful treatment for fescue conversion to native warm-season grasses. After fescue has been eliminated, the following publications can be consulted to establish and manage other vegetation. All rights reserved.