Abstract
Abstract Bermudagrass is the most troublesome and difficult-to-control perennial grass weed in Florida sugarcane. Once established, it may be effectively controlled only during the sugarcane fallow period using a combination of nonselective herbicides and tillage. Options for selective management of bermudagrass that escape sugarcane fallow period management programs must be evaluated to mitigate its progressive increase as the crop cycle increases from plant cane to ratoon crops. Greenhouse and field studies were conducted in Belle Glade, Florida, from 2017 to 2018, to determine the response of newly established bermudagrass from sprigs with stolons to two or three sequential applications of topramezone (25 and 50 g ha −1 ) every 14 d, and combinations of topramezone (25 and 50 g ha −1 ) with herbicides that inhibit photosystem II (PS II) such as atrazine (2,240 g ha −1 ), ametryn (440 g ha −1 ), and metribuzin (2,240 g ha −1 ). Two or three sequential applications of topramezone with a cumulative total of 75 to 100 g ha −1 provided >93% bermudagrass control 42 d after the first sequential application under greenhouse and field conditions. These treatments exhibited 12% chance of survival 70 d after the first sequential application. There was an additive effect of PS II-inhibitor herbicides on bermudagrass control in mixtures with topramezone. The mixture of topramezone (50 g ha −1 ) with metribuzin and atrazine provided more than 87% and 92% bermudagrass control under greenhouse and field conditions, respectively, 42 d after treatment. Bermudagrass treated with topramezone (50 g ha −1 ) in a mixture with metribuzin exhibited 23% chance of survival 70 d after treatment. The results show good efficacy of sequential topramezone applications every 14 d or in a mixture with the PS II-inhibitor herbicides atrazine and metribuzin for control of newly established bermudagrass that typically escape control measures during the sugarcane fallow management period.
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Claims 7
Claim · model-written summary
Two or three sequential applications of topramezone provided over 93% control of bermudagrass 42 days after the first application under greenhouse and field conditions.
- Taxon
- bermudagrass
Cynodon dactylont0 - Treatment
- Two or three sequential applications of topramezonee7
- Outcome
- bermudagrass controle5
- Direction
- increaseinferrede5
- Value
- >93%e5
- Setting
- greenhouse and field conditionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e7“Two or three sequential applications of topramezone”
e5“provided >93% bermudagrass control 42 d after the first sequential application under greenhouse and field conditions”
Claim · model-written summary
Two or three sequential applications of topramezone left bermudagrass with 12% chance of survival 70 days after the first application.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- Two or three sequential applications of topramezonee7
- Outcome
- chance of survivale6
- Direction
- decreaseinferrede6
- Value
- 12%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e7“Two or three sequential applications of topramezone”
e6“These treatments exhibited 12% chance of survival 70 d after the first sequential application”
Claim · model-written summary
PS II-inhibitor herbicides had an additive effect on bermudagrass control when mixed with topramezone.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- PS II-inhibitor herbicidese4
- Outcome
- bermudagrass controle4
- Direction
- increaseinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e4“There was an additive effect of PS II-inhibitor herbicides on bermudagrass control in mixtures with topramezone”
Claim · model-written summary
Topramezone at 50 g ha-1 with metribuzin and atrazine gave more than 87% bermudagrass control under greenhouse conditions 42 days after treatment.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- with metribuzin and atrazinee4
- Outcome
- bermudagrass controle3
- Direction
- increaseinferrede3
- Value
- more than 87%e3
- Setting
- greenhousee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e4“with metribuzin and atrazine provided more than 87%”
e3“provided more than 87% and 92% bermudagrass control under greenhouse and field conditions, respectively, 42 d after treatment”
Claim · model-written summary
Topramezone at 50 g ha-1 with metribuzin and atrazine gave 92% bermudagrass control under field conditions 42 days after treatment.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- with metribuzin and atrazinee4
- Outcome
- bermudagrass controle3
- Direction
- increaseinferrede3
- Value
- 92%e3
- Setting
- field conditionse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e4“with metribuzin and atrazine provided more than 87%”
e3“provided more than 87% and 92% bermudagrass control under greenhouse and field conditions, respectively, 42 d after treatment”
Claim · model-written summary
Topramezone at 50 g ha-1 in a mixture with metribuzin left bermudagrass with 23% chance of survival 70 days after treatment.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- in a mixture with metribuzine5
- Outcome
- chance of survivale5
- Direction
- decreaseinferrede5
- Value
- 23%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e5“in a mixture with metribuzin exhibited 23% chance of survival 70 d after treatment”
Claim · model-written summary
Sequential topramezone applications every 14 days, or topramezone in mixture with atrazine and metribuzin, give good control of newly established bermudagrass.
- Taxon
- bermudagrassCynodon dactylont0
- Treatment
- sequential topramezone applications every 14 de6
- Outcome
- control of newly established bermudagrasse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Newly established bermudagrass response to topramezone and photosystem II-inhibitor herbicides”
e6“The results show good efficacy of sequential topramezone applications every 14 d or in a mixture with the PS II-inhibitor herbicides atrazine and metribuzin for control of newly established bermudagrass”
The same questions in other papers
topramezone · control · Cynodon dactylon (Bermuda grass)Results agree
1 paper in the same direction as this paper
- positive
metribuzin · control · Cynodon dactylon (Bermuda grass)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
herbicide · control · Cynodon dactylon (Bermuda grass)Positive and negative results
9 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
8 papers more in this group
See all 12 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.