Abstract
Planting glyphosate-resistant sugarbeet in narrow rows could improve weed control with fewer herbicide applications and cultivations. Field studies were conducted in 2007 and 2008 at multiple locations in Michigan to compare weed management and sugarbeet yield and quality in glyphosate-resistant sugarbeet planted in 38-, 51-, and 76-cm rows. At all locations, weed densities and biomass were less after glyphosate treatments than after conventional herbicide treatments. Weed densities and biomass also were less in 38- and 51-cm rows compared with 76-cm rows following a single glyphosate application when weeds were 10 cm tall. Averaged over row width, sugarbeet treated with glyphosate when weeds first reached 2 cm in height and again as needed thereafter yielded similarly to sugarbeet treated when weeds were 5 to 10 cm tall. However, root yields were reduced when glyphosate application was delayed until weeds averaged 15 cm in height. Sugarbeet root and sugar yields were greater from 38- and 51-cm row widths than from the 76-cm row widths, averaged over all herbicide treatments. Regardless of row width, initial glyphosate applications should be made before weeds reach 10 cm in height to maximize yield and minimize weed competition with sugarbeet.
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Claims 6
Claim · model-written summary
Glyphosate gave lower weed density and biomass than conventional herbicides.
- Taxon
- sugarbeet
Beta vulgaris subsp. vulgarist0 - Treatment
- glyphosate treatmentse0
- Interactor
- weede0weed
- Outcome
- weed densities and biomasse0
- Direction
- lesse0
- Comparator
- conventional herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed densities and biomass were less after glyphosate treatments than after conventional herbicide treatments”
t0“Sugarbeet”
Claim · model-written summary
Narrower rows had lower weed density and biomass than 76-cm rows after one glyphosate application.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- 38- and 51-cm rowse0
- Interactor
- weedse0weed
- Outcome
- Weed densities and biomasse0
- Direction
- lesse0
- Qualifier
- when weeds were 10 cm talle0
- Comparator
- 76-cm rowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed densities and biomass also were less in 38- and 51-cm rows compared with 76-cm rows following a single glyphosate application when weeds were 10 cm tall.”
t0“Sugarbeet”
Claim · model-written summary
Applying glyphosate at 2-cm weed height gave similar yield to application at 5 to 10 cm.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarise0
- Treatment
- glyphosate when weeds first reached 2 cm in heighte0
- Interactor
- weedse0weed
- Outcome
- yielded similarlye0
- Direction
- similarlye0
- Comparator
- weeds were 5 to 10 cm talle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugarbeet treated with glyphosate when weeds first reached 2 cm in height and again as needed thereafter yielded similarly to sugarbeet treated when weeds were 5 to 10 cm tall”
Claim · model-written summary
Delaying glyphosate until weeds reached 15 cm reduced root yield.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- glyphosate application was delayed until weeds averaged 15 cm in heighte0
- Interactor
- weedse0weed
- Outcome
- root yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root yields were reduced when glyphosate application was delayed until weeds averaged 15 cm in height”
t0“Sugarbeet”
Claim · model-written summary
Sugarbeet root and sugar yields were greater in 38- and 51-cm rows than 76-cm rows.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarise0
- Treatment
- 38- and 51-cm row widthse0
- Outcome
- root and sugar yieldse0
- Direction
- greatere0
- Comparator
- 76-cm row widthse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarbeet root and sugar yields were greater from 38- and 51-cm row widths than from the 76-cm row widths”
Claim · model-written summary
The authors recommend initial glyphosate before weeds reach 10 cm.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarise0
- Outcome
- initial glyphosate applications should be made before weeds reach 10 cm in heighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“initial glyphosate applications should be made before weeds reach 10 cm in height to maximize yield and minimize weed competition with sugarbeet”
The same questions in other papers
glyphosate · yield · Beta vulgaris (beet)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
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See all 8 papers →glyphosate · weed · Beta vulgaris (beet)Positive and negative results
8 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- positive
- no effect
6 papers more in this group
See all 10 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.