Search Results

You are looking at 1 - 10 of 313 items for :

  • "postemergence" x
  • Refine by Access: All x
Clear All
Full access

Orville C. Baldos, Joseph DeFrank, and Glenn Sakamoto

safe and cost-effective weed management protocol for seashore dropseed establishment, characterization of herbicide tolerance is essential. In this study, the tolerance of seashore dropseed to applications of pre- and postemergence herbicides and table

Free access

Christopher A. Proctor and Zachary J. Reicher

POST herbicide dicamba, but the lethal rate depended on plant age. Postemergence applications of clopyralid resulted in less than 45% control of purslane at harvest of leafy greens ( Norsworthy and Smith, 2005 ), but clopyralid is no longer labeled for

Free access

Joshua J. Skelton, William Sharp, and Bruce E. Branham

time requiring the use of a postemergence herbicide application for eradication ( Branham et al., 2010 ). The selective control of ABG in cool-season turf, especially kentucky bluegrass ( Poa pratensis L.), can be challenging as a result of limited

Free access

Lambert B. McCarty and Daniel L. Colvin

Buffalograss [Buchloe dactyloides (Nutt.) Engelm.] is a turfgrass species traditionally adapted to low-rainfall areas that may incur unacceptable weed encroachment when grown in higher rainfall areas such as Florida. An experiment was performed to evaluate the tolerance of two new buffalograss cultivars, `Oasis' and `Prairie', to postemergence herbicides commonly used for grass, broadleaf, and sedge weed control. Twenty to 40 days were required for each cultivar to recover from treatment with asulam, MSMA, and sethoxydim (2.24, 2.24, and 0.56 kg-ha-l, respectively). Other herbicides used for postemergence grass weed control (metsulfuron, quinclorac, and diclofop at 0.017, 0.56, and 1.12 kg·ha-1, respectively) did not cause unacceptable buffalograss injury. Herbicides used for postemergence broadleaf weed control, triclopyr, 2,4-D, sulfometuron, dicamba (0.56, 1.12, 0.017, and 0.56 kg·ha-1, respectively), and a three-way combination of 2,4-D + dicamba + mecoprop (1.2 + 0.54 + 0.13 kg·ha-1), caused 20 to 30 days of unacceptable or marginally acceptable turfgrass quality, while 20 days were required for `Prairie' buffalograss to recover from atrazine treatments. `Oasis' buffalograss did not fully recover from 2,4-D or 2,4-D + dicamba + mecoprop through 40 days after treatment. Herbicides used for postemergence sedge control, bentazon and imazaquin, caused slightly reduced, but acceptable, levels of turf quality in both cultivars throughout the experiment. Chemical names used: 6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine (atrazine); methyl[(4-aminophenyl)sulfonyl]carhamate (asulam); 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide (bentazon); 3,6-dichloro-2-methoxybenzoic acid (dicamba); (±)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid (diclofop); 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid (imazaquin); (±)-2-(4-chloro-2-methylphenoxy)propanoic acid (mecoprop); 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acid (metsulfuron); monosodium salt of methylarsonic acid (MSMA); 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one(sethoxydim); 2-[[[[(4,6-dimethylethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acid (sulfometuron); [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid (triclopyr); (2,4-dichlorophenoxyl)acetic acid (2,4-D); 3,7-dichloro-8-quinolinecarboxylic acid (quinclorac).

Free access

Maren E. Veatch-Blohm, Dorothy Chen, and Matthew Hassett

contained Peter’s 20–20–20 fertilizer. The bulbs that were to be subjected to salinity postemergence were irrigated with a 0 m m NaCl solution. When the bulbs were being tested for their response to salinity when NaCl exposure began preemergence, all of the

Full access

James T. Brosnan and Gregory K. Breeden

Pyrimisulfan is a sulfonanilide herbicidal inhibitor of ALS with structural similarity to bispyribac-sodium and pyrithiobac-sodium ( Asakura et al., 2012 ). Pyrimisulfan is used for both pre- and postemergence weed control in rice ( Oryza stricta L

Free access

Zane Raudenbush and Steven J. Keeley

herbicide performance in the spring, and our literature search revealed no reports in the refereed literature concerning the influence of spring application timing on dandelion control with postemergence broadleaf herbicides currently used on turfgrass

Free access

R. Kasten Dumroese, Jasmine L. Williams, Jeremiah R. Pinto, and Peng Zhang

-effective ( South and Gjerstad, 1980a ). To maximize germination and early growth of desired seedlings, bareroot beds are often treated with pre- and postemergence herbicides immediately after sowing ( South and Gjerstad, 1980b ). One such herbicide is oxyfluorfen

Full access

Orville C. Baldos, Joseph DeFrank, and Glenn Sakamoto

effective pre- and postemergence herbicides labeled for roadside use need to be identified. The studies in this preliminary and regional report characterized the response of tropical fimbry to the preemergence herbicides, oryzalin and oxadiazon, and to the

Free access

Bielinski M. Santos and Jose P. Morales-Payan

Trials were conducted under controlled conditions to determine the tolerance of young papaya plants (15 cm tall) to postemergence herbicides. Herbicides used were paraquat (1.68 Kg ai/Ha), MSMA (2.24 Kg ai/Ha), 2,4-D (4.26 Kg ai/Ha), bromoxynil (0.28 Kg ai/Ha), cyanazine (1.12 Kg ai/Ha), dimethenamid (1.12 Kg ai/Ha), endothal (0.56 Kg ai/Ha), imazameth (0.067 Kg ai/Ha), imazethapyr (0.028 Kg ai/Ha) lactofen (0.12 Kg ai/Ha), oxyfluorfen (0.03 Kg ai/Ha), acifluorfen (0.28 Kg ai/Ha), atrazine (2.24 Kg ai/Ha), and bentazon (1.12 Kg ai/Ha) as well as the untreated control. Atrazine, bentazon, cyanazine, imazemeth, imazethapyr, and dimethenamid did not cause phytotoxicity at the rates used and were equal to the untreated control. Other herbicides caused severe injuries followed by total death at 10 days after treatment.