Does renovation effect pre-emergent herbicide barriers?
This is a question often asked in spring and early summer as renovation of warm season turf often occurs after pre-emergent herbicides have been applied. Theory would suggest that any cultural activity such as coring and verti-cutting would disrupt pre-emergent herbicide barriers and lead to increased weed germination and establishment. Research has shown that this is not necessarily the case. With a good sward of turfgrass, coring of pre-emergent herbicide treated areas has minimal effect on an increase in the population of annual grass weeds.
Effects of turf cultivation practices on the efficacy of preemergence grass herbicides. Branham and Rieke. Agronomy Journal (1986).
Oxadiazon treatments on overseeded putting green turf. Johnson. Weed Science (1982)
Send an e-mail or photograph to jyri.kaapro@Envu.com if you have any experiences of turf with either of these symptoms.Back to Others