Abstract
Field experiments were conducted from 2008 through 2010 near Lyons, GA, to develop integrated weed management systems for organic Vidalia ® sweet onion ( Allium cepa ) production. Treatments were a factorial arrangement of summer solarization, cultivation with a tine weeder, and a clove oil herbicide. Plots were solarized with clear plastic mulch during the summer fallow period before transplanting onion. Cultivation treatments were twice at 2-week intervals, four times at 2-week intervals, and a noncultivated control. Herbicide treatments were clove oil plus vinegar, clove oil plus an emulsified petroleum oil (EPO) insecticide used as an adjuvant, and a nontreated control. ‘Savannah Sweet’ onions were transplanted in early-December each year, with cultivation and herbicide applications events occurring the following January and February. Onions were harvested the following spring. In addition to yield measurement, a subsample of harvested onion was stored in a controlled atmospheric (CA) storage facility to evaluate treatment effects on diseases of stored onion. Summer fallow solarization did not control the cool-season weeds present in these trials. Cultivating transplanted onion with a tine weeder effectively managed cutleaf eveningprimrose ( Oenothera laciniata ) and swinecress ( Coronopus didymus ) and improved onion yields in 2 of 3 years. There was little difference in overall performance between two cultivations and four cultivations with the tine weeder. The 1 year of marginal weed control with the tine weeder was due to persistently wet soils during winter months that inhibited optimum performance of the implement. Clove oil, combined with vinegar or an EPO insecticide, provided marginal weed control and had no effect on onion yield. Diseases of stored onion were unaffected by any of the treatment combinations, although overall incidence of diseases of stored onion was higher in 2010 compared with other years. This corresponds with the 1 year of marginal weed control with the tine weeder, suggesting that the presence of weeds may be a factor related to disease incidence during storage.
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Claims 12
Claim · model-written summary
Summer fallow solarization did not control cool-season weeds.
- Taxon
- Onion
Allium cepat0 - Treatment
- Summer fallow solarizatione0
- Interactor
- cool-season weedse0weed
- Outcome
- cool-season weedse0
- Direction
- did not controle0
- Comparator
- noncultivated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Summer fallow solarization did not control the cool-season weeds present in these trials”
e1“a noncultivated control”
t0“Onion”
Claim · model-written summary
Tine weeder cultivation effectively managed cutleaf eveningprimrose.
- Taxon
- onionAllium cepae0
- Treatment
- Cultivating transplanted onion with a tine weedere0
- Interactor
- Oenothera laciniata
Oenothera laciniatae0weed - Outcome
- managed cutleaf eveningprimrosee0
- Direction
- effectively managede0
- Comparator
- noncultivated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivating transplanted onion with a tine weeder effectively managed cutleaf eveningprimrose ( Oenothera laciniata ) and swinecress ( Coronopus didymus )”
e1“a noncultivated control”
Claim · model-written summary
Tine weeder cultivation effectively managed swinecress.
- Taxon
- onionAllium cepae0
- Treatment
- Cultivating transplanted onion with a tine weedere0
- Interactor
- Coronopus didymus
Lepidium didymume0weed - Outcome
- swinecresse0
- Direction
- effectively managede0
- Comparator
- noncultivated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivating transplanted onion with a tine weeder effectively managed cutleaf eveningprimrose ( Oenothera laciniata ) and swinecress ( Coronopus didymus )”
e1“a noncultivated control”
Claim · model-written summary
Tine weeder cultivation improved onion yields in two of three years.
- Taxon
- onionAllium cepae0
- Treatment
- Cultivating transplanted onion with a tine weedere0
- Outcome
- onion yieldse0
- Direction
- improvede0
- Value
- 2 of 3 yearse0
- Comparator
- noncultivated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivating transplanted onion with a tine weeder effectively managed cutleaf eveningprimrose ( Oenothera laciniata ) and swinecress ( Coronopus didymus ) and improved onion yields in 2 of 3 years”
e1“a noncultivated control”
Claim · model-written summary
Overall performance differed little between two and four tine weeder cultivations.
- Taxon
- OnionAllium cepat0
- Treatment
- two cultivationse0
- Outcome
- overall performancee0
- Direction
- little differencee0
- Comparator
- four cultivationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was little difference in overall performance between two cultivations and four cultivations with the tine weeder”
t0“Onion”
Claim · model-written summary
Persistently wet winter soils inhibited tine weeder performance in the year of marginal weed control.
- Taxon
- OnionAllium cepat0
- Outcome
- marginal weed controle0
- Qualifier
- persistently wet soils during winter monthse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1 year of marginal weed control with the tine weeder was due to persistently wet soils during winter months that inhibited optimum performance of the implement”
t0“Onion”
Claim · model-written summary
Clove oil with vinegar provided marginal weed control.
- Taxon
- OnionAllium cepat0
- Treatment
- Clove oil, combined with vinegare0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- marginale0
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clove oil, combined with vinegar or an EPO insecticide, provided marginal weed control”
e1“a nontreated control”
t0“Onion”
Claim · model-written summary
Clove oil with EPO insecticide provided marginal weed control.
- Taxon
- OnionAllium cepat0
- Treatment
- Clove oil, combined with vinegar or an EPO insecticidee0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- marginale0
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clove oil, combined with vinegar or an EPO insecticide, provided marginal weed control”
e1“a nontreated control”
t0“Onion”
Claim · model-written summary
Clove oil treatments had no effect on onion yield.
- Taxon
- onionAllium cepae0
- Treatment
- Clove oil, combined with vinegar or an EPO insecticidee0
- Outcome
- onion yielde0
- Direction
- no effecte0
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clove oil, combined with vinegar or an EPO insecticide, provided marginal weed control and had no effect on onion yield”
e1“a nontreated control”
Claim · model-written summary
Treatment combinations did not affect stored onion diseases.
- Taxon
- onionAllium cepae0
- Treatment
- treatment combinationse0
- Outcome
- Diseases of stored onione0
- Direction
- unaffectede0
- Comparator
- nontreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Diseases of stored onion were unaffected by any of the treatment combinations”
e1“a nontreated control”
Claim · model-written summary
Stored onion disease incidence was higher in 2010 than other years.
- Taxon
- onionAllium cepae0
- Outcome
- incidence of diseases of stored onione0
- Direction
- highere0
- Comparator
- other yearse0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“overall incidence of diseases of stored onion was higher in 2010 compared with other years”
Claim · model-written summary
The authors suggest that weeds may be related to disease incidence during onion storage.
- Taxon
- onionAllium cepae1
- Interactor
- weedse0weed
- Outcome
- disease incidence during storagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that the presence of weeds may be a factor related to disease incidence during storage”
e1“before transplanting onion”
The same questions in other papers
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- no effect
solarization · weed · Allium cepa (onion)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
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- positive
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See all 12 papers →transplanting · yield · Allium cepa (onion)Positive and negative results
61 papers in the same direction as this paper · 7 in the opposite direction · 2 reporting no difference from an alternative
- positive
- negative
- no effect
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See all 71 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.