Abstract
Abstract Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato ( Solanum lycopersicum L.) producers due to its ability to puncture plastic mulch, resilient tubers, and rapid rhizome proliferation. Preemergence herbicides effectively suppress purple nutsedge in tomatoes under plastic mulch. Although the impact of co‐application of herbicides with fertilizers has been studied in row crops, its potential in vegetable plasticulture systems remains unexplored. This study aimed to evaluate the effectiveness and crop safety of the preemergence herbicide S ‐metolachlor, both as a standalone treatment and in combination with a fertilizer enhancer or chelated iron in tomato plasticulture. Field trials at the University of Florida's Southwest Florida Research and Education Center, Immokalee, FL, involved applying S ‐metolachlor at the recommended rate of 1 kg a.i. ha −1 on raised beds before installing plastic mulch. The herbicide was applied as a blanket spray alone, mixed with fertilizer enhancer, and coated on chelated iron fertilizer. Results indicate that using S ‐metolachlor alone effectively reduced purple nutsedge density compared to the nontreated control in both trials I and II. Combining S ‐metolachlor with fertilizer enhancer or chelated iron resulted in a >30% and 57% reduction in purple nutsedge density, respectively, compared to the nontreated control in trial II. These treatments did not adversely impact chlorophyll content or crop yield ( p > 0.05) compared to the nontreated control. Notably, tomato yield significantly ( p < 0.05) decreased with increased purple nutsedge density at 4, 8, and 12 weeks after transplanting. Overall, the results from both trials suggest that using S ‐metolachlor is an effective approach to reduce purple nutsedge infestation in plastic‐mulched raised beds without negatively impacting tomato health and productivity.
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Claims 6
Claim · model-written summary
S-metolachlor alone reduced purple nutsedge density relative to the nontreated control in both trials.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- S ‐metolachlor alonee1
- Interactor
- Purple nutsedgee2weed
- Outcome
- purple nutsedge densitye1
- Direction
- reducede1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Results indicate that using S ‐metolachlor alone effectively reduced purple nutsedge density compared to the nontreated control in both trials I and II”
e2“Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato”
Claim · model-written summary
Combining S-metolachlor with fertilizer enhancer reduced purple nutsedge density by more than 30% relative to the nontreated control in trial II.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- Combining S ‐metolachlor with fertilizer enhancere1
- Interactor
- Purple nutsedgee2weed
- Outcome
- purple nutsedge densitye1
- Direction
- reductione1
- Value
- >30%e1
- Qualifier
- trial IIe1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Combining S ‐metolachlor with fertilizer enhancer or chelated iron resulted in a >30% and 57% reduction in purple nutsedge density, respectively, compared to the nontreated control in trial II”
e2“Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato”
Claim · model-written summary
Combining S-metolachlor with chelated iron reduced purple nutsedge density by 57% relative to the nontreated control in trial II.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- chelated irone1
- Interactor
- Purple nutsedgee2weed
- Outcome
- purple nutsedge densitye1
- Direction
- reductione1
- Value
- 57%e1
- Qualifier
- trial IIe1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Combining S ‐metolachlor with fertilizer enhancer or chelated iron resulted in a >30% and 57% reduction in purple nutsedge density, respectively, compared to the nontreated control in trial II”
e2“Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato”
Claim · model-written summary
The S-metolachlor co-applications with fertilizer enhancer or chelated iron did not adversely affect chlorophyll content or crop yield relative to the nontreated control.
- Taxon
- tomatoSolanum lycopersicume3
- Treatment
- Combining S ‐metolachlor with fertilizer enhancer or chelated irone2
- Outcome
- chlorophyll content or crop yielde1
- Direction
- did not adversely impacte1
- Qualifier
- p > 0.05e1
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These treatments did not adversely impact chlorophyll content or crop yield ( p > 0.05) compared to the nontreated control”
e2“Combining S ‐metolachlor with fertilizer enhancer or chelated iron resulted in a >30% and 57% reduction”
e3“Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato”
Claim · model-written summary
Tomato yield decreased significantly with increased purple nutsedge density at 4, 8, and 12 weeks after transplanting.
- Taxon
- tomatoSolanum lycopersicume1
- Interactor
- purple nutsedgee1weed
- Outcome
- tomato yielde1
- Direction
- decreasede1
- Qualifier
- with increased purple nutsedge density at 4, 8, and 12 weeks after transplantinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Notably, tomato yield significantly ( p < 0.05) decreased with increased purple nutsedge density at 4, 8, and 12 weeks after transplanting”
e2“Purple nutsedge ( Cyperus rotundus L.) poses a significant challenge to Florida tomato”
Claim · model-written summary
Using S-metolachlor is an effective approach to reduce purple nutsedge infestation in tomato without harming tomato health and productivity.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- S ‐metolachlore1
- Outcome
- purple nutsedge infestatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“using S ‐metolachlor is an effective approach to reduce purple nutsedge infestation”
e2“without negatively impacting tomato health and productivity”
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