Premium
Using Herbicides and Perennial Ryegrass to Renovate Turf Dominated by Annual Bluegrass
Author(s) -
Park Bradley S.,
Elmore Matthew T.,
Murphy James A.
Publication year - 2019
Publication title -
crop, forage and turfgrass management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.29
H-Index - 10
ISSN - 2374-3832
DOI - 10.2134/cftm2019.01.0005
Subject(s) - mesotrione , lolium perenne , perennial plant , glyphosate , seeding , agronomy , weed control , poa annua , seedling , environmental science , biology , weed , pesticide , atrazine
Core Ideas Glyphosate applied prior to perennial ryegrass (PRYE) seeding did not affect PRYE cover compared to seeding alone (nontreated). Post‐seeding herbicide regimens are necessary to maximize PYRE establishment where a significant annual bluegrass (ABG) soil seedbank exists. Autumn applications of ethofumesate resulted in the greatest PRYE cover and ABG control by the following spring. Mesotrione‐based herbicide programs applied during autumn provided ABG control. There was no advantage of applying mesotrione + amicarbazone for postemergence ABG control prior to PRYE seeding. Annual bluegrass (ABG; Poa annua L.) is among the most problematic weeds in golf and sports turfs. Perennial ryegrass (PRYE; Lolium perenne L.) can be more effectively seeded into existing turfs compared with other cool‐season turfgrasses due to its quick germination and seedling vigor. Herbicide programs are often used to suppress ABG encroachment into newly renovated turfs. The objective of this study was to assess the effectiveness of herbicide programs designed to suppress ABG in turf seeded with PRYE. Trials were initiated during September 2015 and 2016 on a mature stand of ABG in North Brunswick, NJ. Treatments consisted of 13 herbicide programs and a nontreated check. Programs involved applications of glyphosate, ethofumesate, mesotrione, and amicarbazone applied during September through December 2015 and 2016. Separate trial areas were core cultivated with soil reincorporated; ‘Manhattan 5 GLR’ PRYE was slit‐seeded on 14 Sep. 2015 and 16 Sep. 2016. Glyphosate followed by (fb) seeding did not affect PRYE establishment compared to seeding alone (nontreated). Three autumn applications of ethofumesate resulted in the greatest PRYE cover and best ABG control by the following spring in both years. All mesotrione herbicide programs suppressed ABG encroachment. Applications of mesotrione + amicarbazone prior to PRYE seeding did not affect PRYE establishment compared to most mesotrione‐only herbicide programs.