Translator Disclaimer
1 August 2017 Postemergence Control and Glyphosate Tolerance of Doveweed (Murdannia nudiflora)
Author Affiliations +
Abstract

Doveweed is a problematic weed of lawns and sod production, as well as golf course roughs, fairways, and tees. End-user reports of selective POST control options are inconsistent and control is often short-lived. In addition, inconsistent control with non-selective herbicides such as glyphosate is common. The goals of this research were: (1) evaluate selective POST doveweed control options in ‘Tifway’ hybrid bermudagrass turf; (2) compare efficacy of single vs. sequential applications of selective POST herbicides; (3) quantify doveweed tolerance to glyphosate; and (4) quantify recovery of foliar applied glyphosate following treatment with a C14-glyphosate solution. A single application of sulfentrazone metsulfuron; thiencarbazone iodosulfuron dicamba or 2,4-D MCPP dicamba carfentrazone; or thiencarbazone foramsulfuron halosulfuron provided >60% control 2 weeks after initial treatment (WAIT). A second application of these treatments 3 WAIT improved control 6 WAIT. Two applications of 2,4-D MCPP dicamba carfentrazone or thiencarbazone foramsulfuron halosulfuron provided ~80% control 6 WAIT. Doveweed was tolerant to glyphosate application up to 5.68 kg ae ha-1. Absorption of 14C-glyphosate was compared between doveweed with cuticle intact, doveweed with a disturbed cuticle, and smooth crabgrass. 14C-glyphosate recovery from the leaf surface of doveweed plants with an intact cuticle was 93.6%. In comparison, 14C-glyphosate recovery from the leaf surface of doveweed plants with a disrupted cuticle and the leaf surface of crabgrass plants was 79.1 and 70.5%, respectively.

Nomenclature: Bromoxynil; carfentrazone; dicamba; foramsulfuron; glyphosate; halosulfuron; iodosulfuron; mecoprop; metsulfuron; MSMA; quinclorac; sulfentrazone; thiencarbazone; 2,4-D; doveweed, Murdannia nudiflora (L.) Brenan; smooth crabgrass, Digitaria ischaemum (Schreb.) Schreb. ex Muhl.; ‘Tifway’ bermudagrass, Cynodon dactylon (L.) Pers. × Cynodon transvaalensis Burtt-Davy.

© Weed Science Society of America, 2017
Jeffrey L. Atkinson, Lambert B. McCarty, Brian A. Powell, Scott McElroy, Fred Yelverton, and Alan G. Estes "Postemergence Control and Glyphosate Tolerance of Doveweed (Murdannia nudiflora)," Weed Technology 31(4), 582-589, (1 August 2017). https://doi.org/10.1017/wet.2017.31
Received: 3 September 2017; Accepted: 1 April 2017; Published: 1 August 2017
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top