Abstract
Postemergence applications of imazaquin {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1 H -imidazol-2-yl]-3-quinolinecarboxylic acid} controlled higher levels of purple nutsedge ( Cyperus rotundus L. # CYPRO) in common bermudagrass [ Cynodon dactylon (L.) Pers.] and hybrid bermudagrass (′Tifgreen’ and ‘Tifdwarf′, C. dactylon × C. transvaalensis Burtt-Davy) than monosodium salt of methylarsonic acid (MSMA). Control was better at 560 or 840 g ai/ha of imazaquin than at lower rates. Postemergence applications of imazaquin plus 2240 g ai/ha of MSMA controlled more purple nutsedge than equivalent rates of imazaquin alone. Preemergence applications of imazaquin were not effective. Bermudagrass discoloration was observed in some experiments on turfs mowed at a height of 1.3 cm or less but usually disappeared within 2 to 3 weeks, especially when MSMA was used in combination with imazaquin. No injury was observed on bermudagrasses, zoysiagrass ( Zoysia japonica Steud. ‘Meyer′), St. Augustinegrass [ Stenotaphrum secundatum (Walt.) Ktze. ‘Raleigh′], and centipedegrass [ Erernochloa ophiuroides (Munro) Hack.] maintained at mowing heights above 1.3 cm.
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Claims 7
Claim · model-written summary
Imazaquin control of purple nutsedge in common bermudagrass was better at 560 or 840 g ai/ha than at lower rates.
Verbatim
e0“controlled higher levels of purple nutsedge ( Cyperus rotundus L. # CYPRO) in common bermudagrass”
e3“Control was better at 560 or 840 g ai/ha of imazaquin than at lower rates”
Claim · model-written summary
Imazaquin plus 2240 g ai/ha of MSMA controlled more purple nutsedge in common bermudagrass than equivalent rates of imazaquin alone.
Verbatim
e0“controlled higher levels of purple nutsedge ( Cyperus rotundus L. # CYPRO) in common bermudagrass”
e4“Postemergence applications of imazaquin plus 2240 g ai/ha of MSMA controlled more purple nutsedge than equivalent rates of imazaquin alone”
Claim · model-written summary
Preemergence applications of imazaquin were not effective against purple nutsedge in warm-season turfgrasses.
- Taxon
- Warm-Season Turfgrassest0
- Treatment
- Preemergence applications of imazaquine5
- Interactor
- Purple Nutsedget0weed
- Outcome
- effectivee5
Not reportedComparatorDirection
Verbatim
t0“Purple Nutsedge (Cyperus rotundus) Control with Imazaquin in Warm-Season Turfgrasses”
e5“Preemergence applications of imazaquin were not effective”
Claim · model-written summary
Bermudagrass discoloration was observed in some experiments on turfs mowed at 1.3 cm or less, usually disappearing within 2 to 3 weeks.
- Taxon
- Bermudagrass
Cynodon dactylone6 - Outcome
- discoloratione6
- Qualifier
- mowed at a height of 1.3 cm or lesse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Bermudagrass discoloration was observed in some experiments on turfs mowed at a height of 1.3 cm or less but usually disappeared within 2 to 3 weeks”
Claim · model-written summary
No injury was observed on zoysiagrass maintained at mowing heights above 1.3 cm.
ZoysiaNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No injury was observed on bermudagrasses, zoysiagrass”
e1“maintained at mowing heights above 1.3 cm”
Claim · model-written summary
No injury was observed on St. Augustinegrass maintained at mowing heights above 1.3 cm.
Not reportedDirection
Verbatim
e0“No injury was observed on bermudagrasses, zoysiagrass”
e1“maintained at mowing heights above 1.3 cm”
e2“St. Augustinegrass”
Claim · model-written summary
No injury was observed on centipedegrass maintained at mowing heights above 1.3 cm.
Not reportedDirection
Verbatim
e0“No injury was observed on bermudagrasses, zoysiagrass”
e1“maintained at mowing heights above 1.3 cm”
e2“centipedegrass”
The same questions in other papers
imazaquin · control · Cynodon dactylon (Bermuda grass)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.