Postemergence Control and Glyphosate Tolerance of Doveweed (Murdannia nudiflora). (24th August 2017)

• Record Type: Journal Article
• Authors: Atkinson, Jeffrey L.; McCarty, Lambert B.; Powell, Brian A.; McElroy, Scott; Yelverton, Fred; Estes, Alan G.
• Is Part Of: Weed technology. Volume 31:Number 4(2017)
• Page Start: 582
• Page End: 589
• Publication Date: 2017-08-24
• Subjects: 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; Golf course, -- turfgrass, -- weed control; Weeds -- Periodicals; Weeds -- Control -- Periodicals; 632.5
• DOI: 10.1017/wet.2017.31
• Languages: English
• ISSNs: 0890-037X

Abstract

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 C 14 -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 kgaeha -1 . Absorption of 14 C-glyphosate was compared between doveweed with cuticle intact, doveweed with a disturbed cuticle, and smooth crabgrass. 14 C-glyphosate recovery from the leaf surface of doveweed plants with an intact cuticle was 93.6%. In comparison, 14 C-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.