Abstract
Methyl bromide has been a key fumigant for broad-spectrum weed control in polyethylene-mulched bell pepper. However, the ozone-depleting nature of methyl bromide has led to its scheduled phaseout from U.S. agriculture. Thus, an effective alternative to methyl bromide is needed. Field trials were conducted in 2007 and 2009 to evaluate the crop response and weed control efficacy of allyl isothiocyanate (ITC) in polyethylene-mulched bell pepper. The experiment included various combinations of two mulch types (low density polyethylene [LDPE] and virtually impermeable film [VIF] mulch) and six rates of allyl isothiocyanate (0, 15, 75, 150, 750, 1,500 kg ha −1 ). Additionally, a standard treatment of methyl bromide/chloropicrin (67 : 33%) at 390 kg ha −1 under LDPE mulch was included for comparison. Bell pepper injury was < 3% in all treatments, except 11% injury at 1,500 kg ha −1 allyl isothiocyanate under VIF mulch at 2 wk after transplanting (WATP). VIF mulch did not provide additional weed control and marketable pepper yield over LDPE mulch. Allyl isothiocyanate at 932 (± 127) kg ha −1 controlled yellow nutsedge (90%), Palmer amaranth (97%), and large crabgrass (92%) through 6 WATP and maintained the marketable yield equivalent to methyl bromide treatment. This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper.
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Claims 8
Claim · model-written summary
Allyl isothiocyanate controlled yellow nutsedge by 90% through 6 weeks after transplanting.
- Taxon
- bell peppere6
- Treatment
- Allyl isothiocyanatee1
- Interactor
- yellow nutsedgee1weed
- Outcome
- weed control efficacye7
- Direction
- controllede1
- Value
- 90%e1
- Qualifier
- through 6 WATPe1
Not reportedComparator
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e7“weed control efficacy of allyl isothiocyanate”
e1“Allyl isothiocyanate at 932 (± 127) kg ha −1 controlled yellow nutsedge (90%), Palmer amaranth (97%), and large crabgrass (92%) through 6 WATP”
Claim · model-written summary
Allyl isothiocyanate controlled Palmer amaranth by 97% through 6 weeks after transplanting.
- Taxon
- bell peppere6
- Treatment
- Allyl isothiocyanatee1
- Interactor
- Palmer amaranthe1weed
- Outcome
- weed control efficacye7
- Direction
- controllede1
- Value
- 97%e1
- Qualifier
- through 6 WATPe1
Not reportedComparator
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e7“weed control efficacy of allyl isothiocyanate”
e1“Allyl isothiocyanate at 932 (± 127) kg ha −1 controlled yellow nutsedge (90%), Palmer amaranth (97%), and large crabgrass (92%) through 6 WATP”
Claim · model-written summary
Allyl isothiocyanate controlled large crabgrass by 92% through 6 weeks after transplanting.
- Taxon
- bell peppere6
- Treatment
- Allyl isothiocyanatee1
- Interactor
- large crabgrasse1weed
- Outcome
- weed control efficacye7
- Direction
- controllede1
- Value
- 92%e1
- Qualifier
- through 6 WATPe1
Not reportedComparator
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e7“weed control efficacy of allyl isothiocyanate”
e1“Allyl isothiocyanate at 932 (± 127) kg ha −1 controlled yellow nutsedge (90%), Palmer amaranth (97%), and large crabgrass (92%) through 6 WATP”
Claim · model-written summary
Allyl isothiocyanate maintained marketable bell pepper yield equivalent to the methyl bromide treatment.
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e1“Allyl isothiocyanate at 932 (± 127) kg ha −1 controlled yellow nutsedge (90%), Palmer amaranth (97%), and large crabgrass (92%) through 6 WATP”
e2“maintained the marketable yield equivalent to methyl bromide treatment”
Claim · model-written summary
Bell pepper injury was below 3% in all treatments.
Verbatim
e3“Bell pepper injury was < 3% in all treatments”
Claim · model-written summary
Allyl isothiocyanate at 1,500 kg/ha caused 11% bell pepper injury under VIF mulch at 2 weeks after transplanting.
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e4“11% injury at 1,500 kg ha −1 allyl isothiocyanate under VIF mulch at 2 wk after transplanting”
Claim · model-written summary
VIF mulch gave no additional weed control or marketable pepper yield over LDPE mulch.
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
e5“VIF mulch did not provide additional weed control and marketable pepper yield over LDPE mulch”
Claim · model-written summary
Allyl isothiocyanate under LDPE mulch can serve as a potential alternative to methyl bromide for weed control in bell pepper.
Verbatim
e6“This research demonstrates that allyl ITC under an LDPE mulch can serve as a potential alternative to methyl bromide for weed control in polyethylene-mulched bell pepper”
The same questions in other papers
mulching · weed · Capsicum annuum (sweet pepper)Positive and negative results
1 paper in the same direction as this paper · 10 reporting no difference from an alternative
- no effect
- positive
- 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.