Abstract
Yellow nutsedge can readily puncture the plastic mulch used in plasticulture tomato production, compromising the benefits of the mulch and hastening its deterioration. Our objective was to identify a PRE-applied (i.e., under the plastic) treatment to minimize yellow nutsedge puncturing. In a greenhouse study a series of halosulfuron rates were PRE-applied to soil planted with yellow nutsedge tubers. These rates were also applied to established plants but with selective spray contact. Nonlinear regression revealed that the concentration of halosulfuron required to reduce dry weights by 90% (GR90) for PRE-applied halosulfuron was 11.6 g/ha. The GR90 for POST-applied halosulfuron was 17.1, 28.1, and 11.6 g/ha for foliar-only, soil-only and foliar plus soil spray contact, respectively. Thus halosulfuron was more effective as a POST-applied, foliar-contacting treatment. However, soil activity was deemed likely sufficient to suppress plastic puncturing. In a noncrop field study, suppression of puncturing was influenced (P < 0.05) by the rate of both PRE-applied halosulfuron and S-metolachlor. A field study with tomato was conducted to evaluate six selective treatments using plastic mulch, PRE-applied S-metolachlor, and the combination of PRE or PRE/POST-split applications of halosulfuron. Plastic alone increased tomato yield threefold compared with bare ground. The addition of various herbicide programs neither increased nor reduced yield compared with plastic alone. Selected herbicide treatments did reduce mulch puncturing but not to the extent or duration that would allow sequential crops to receive the full benefit of nonpunctured plastic.Nomenclature: Halosulfuron, S-metolachlor, yellow nutsedge, Cyperus esculentus L. CYPES, tomato, Lycopersicon esculentum Mill. ‘Florida 91’
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Claims 9
Claim · model-written summary
PRE halosulfuron GR90 for yellow nutsedge dry weight was 11.6 g/ha.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- PRE-applied halosulfurone0
- Outcome
- dry weightse0
- Direction
- reducee0
- Value
- 11.6 g/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of halosulfuron required to reduce dry weights by 90% (GR90) for PRE-applied halosulfuron was 11.6 g/ha.”
t0“Tomato”
Claim · model-written summary
POST foliar-only halosulfuron GR90 was 17.1 g/ha.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- foliar-onlye0
- Outcome
- GR90e0
- Value
- 17.1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GR90 for POST-applied halosulfuron was 17.1, 28.1, and 11.6 g/ha for foliar-only, soil-only and foliar plus soil spray contact, respectively.”
t0“Tomato”
Claim · model-written summary
POST soil-only halosulfuron GR90 was 28.1 g/ha.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- soil-onlye0
- Outcome
- GR90e0
- Value
- 28.1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GR90 for POST-applied halosulfuron was 17.1, 28.1, and 11.6 g/ha for foliar-only, soil-only and foliar plus soil spray contact, respectively.”
t0“Tomato”
Claim · model-written summary
POST foliar plus soil halosulfuron GR90 was 11.6 g/ha.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- foliar plus soil spray contacte0
- Outcome
- GR90e0
- Value
- 11.6 g/hae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GR90 for POST-applied halosulfuron was 17.1, 28.1, and 11.6 g/ha for foliar-only, soil-only and foliar plus soil spray contact, respectively.”
t0“Tomato”
Claim · model-written summary
POST foliar contacting halosulfuron was more effective.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- more effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus halosulfuron was more effective as a POST-applied, foliar-contacting treatment.”
t0“Tomato”
Claim · model-written summary
Rates of PRE halosulfuron and S-metolachlor influenced mulch puncturing suppression.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- PRE-applied halosulfuron and S-metolachlore0
- Outcome
- suppression of puncturinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suppression of puncturing was influenced (P < 0.05) by the rate of both PRE-applied halosulfuron and S-metolachlor.”
t0“Tomato”
Claim · model-written summary
Plastic mulch tripled tomato yield versus bare ground.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Plastic alonee0
- Outcome
- tomato yielde0
- Direction
- increasede0
- Value
- threefolde0
- Comparator
- bare grounde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plastic alone increased tomato yield threefold compared with bare ground.”
Claim · model-written summary
Herbicide programs did not change tomato yield relative to plastic alone.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- various herbicide programse0
- Outcome
- yielde0
- Direction
- neither increased nor reducede0
- Comparator
- plastic alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of various herbicide programs neither increased nor reduced yield compared with plastic alone.”
t0“Tomato”
Claim · model-written summary
Selected herbicides reduced mulch puncturing insufficiently for sequential crops.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Selected herbicide treatmentse0
- Outcome
- mulch puncturinge0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected herbicide treatments did reduce mulch puncturing but not to the extent or duration that would allow sequential crops to receive the full benefit of nonpunctured plastic.”
t0“Tomato”
The same questions in other papers
Halosulfuron-methyl · growth · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
herbicide · yield · Solanum lycopersicum (tomato)Positive and negative results
16 papers in the same direction as this paper · 28 reporting no difference from an alternative
- positive
- no effect
- no effect
41 papers more in this group
See all 45 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.