Abstract
Application of a preplant or preemergence glyphosate burndown is routine in most no-tillage production systems of annual crops, however, time of application may influence overall weed control and grain yield. Six field trials were conducted over a three-year period (2008, 2009 and 2010) near Ridgetown, Ontario, Canada to determine the effect of glyphosate burndown application timing in glyphosate-resistant (GR) no-tillage soybean [Glycine max (L.) Merr.]. Soybean growth was reduced 5%, 10% and 20% when the burndown was delayed to 1, 5 and 12 days after planting (DAP), when evaluated one week after application (WAA), respectively. By 8 WAA, predicted burndown timing increased to 9, 14 and 23 DAP, and was 10, 17 and 26 DAP at 12 WAA, to reduce soybean growth by 5%, 10% and 20%, respectively. Similarly, burndown application at 14, 21 and 30 DAP corresponded to a soybean yield reduction of 5%, 10% and 20%. Seed moisture content was generally insensitive to burndown timing; 80 and 140 DAP were required to increase moisture by 5% and 10%, respectively. This research indicates that delaying glyphosate burndown by up to 14 DAP, approximately VE to VC growth stage, has the potential to result in a modest reduction in soybean yield (5%).
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Claims 10
Claim · model-written summary
Soybean growth fell 5% with burndown delayed to 1 DAP.
- Taxon
- soybean
Glycine maxe0 - Treatment
- burndowne0
- Outcome
- Soybean growthe0
- Direction
- reducede0
- Value
- 5%e0
- Qualifier
- one week after application (WAA)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean growth was reduced 5%, 10% and 20% when the burndown was delayed to 1, 5 and 12 days after planting (DAP), when evaluated one week after application (WAA), respectively”
Claim · model-written summary
Soybean growth fell 10% with burndown delayed to 5 DAP.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndowne0
- Outcome
- Soybean growthe0
- Direction
- reducede0
- Value
- 10%e0
- Qualifier
- one week after application (WAA)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean growth was reduced 5%, 10% and 20% when the burndown was delayed to 1, 5 and 12 days after planting (DAP), when evaluated one week after application (WAA), respectively”
Claim · model-written summary
Soybean growth fell 20% with burndown delayed to 12 DAP.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndowne0
- Outcome
- Soybean growthe0
- Direction
- reducede0
- Value
- 20%e0
- Qualifier
- one week after application (WAA)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean growth was reduced 5%, 10% and 20% when the burndown was delayed to 1, 5 and 12 days after planting (DAP), when evaluated one week after application (WAA), respectively”
Claim · model-written summary
At 8 WAA, 9 DAP burndown was predicted to reduce growth 5%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown timinge0
- Outcome
- soybean growthe0
- Direction
- reducee0
- Value
- 5%e0
- Qualifier
- 8 WAAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By 8 WAA, predicted burndown timing increased to 9, 14 and 23 DAP, and was 10, 17 and 26 DAP at 12 WAA, to reduce soybean growth by 5%, 10% and 20%, respectively”
Claim · model-written summary
At 8 WAA, 14 DAP burndown was predicted to reduce growth 10%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown timinge0
- Outcome
- soybean growthe0
- Direction
- reducee0
- Value
- 10%e0
- Qualifier
- 8 WAAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By 8 WAA, predicted burndown timing increased to 9, 14 and 23 DAP, and was 10, 17 and 26 DAP at 12 WAA, to reduce soybean growth by 5%, 10% and 20%, respectively”
Claim · model-written summary
At 8 WAA, 23 DAP burndown was predicted to reduce growth 20%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown timinge0
- Outcome
- soybean growthe0
- Direction
- reducee0
- Value
- 20%e0
- Qualifier
- 8 WAAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By 8 WAA, predicted burndown timing increased to 9, 14 and 23 DAP, and was 10, 17 and 26 DAP at 12 WAA, to reduce soybean growth by 5%, 10% and 20%, respectively”
Claim · model-written summary
Burndown at 14 DAP corresponded to 5% yield reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown applicatione0
- Outcome
- soybean yielde0
- Direction
- reductione0
- Value
- 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, burndown application at 14, 21 and 30 DAP corresponded to a soybean yield reduction of 5%, 10% and 20%”
Claim · model-written summary
Burndown at 21 DAP corresponded to 10% yield reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown applicatione0
- Outcome
- soybean yielde0
- Direction
- reductione0
- Value
- 10%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, burndown application at 14, 21 and 30 DAP corresponded to a soybean yield reduction of 5%, 10% and 20%”
Claim · model-written summary
Burndown at 30 DAP corresponded to 20% yield reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- burndown applicatione0
- Outcome
- soybean yielde0
- Direction
- reductione0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, burndown application at 14, 21 and 30 DAP corresponded to a soybean yield reduction of 5%, 10% and 20%”
Claim · model-written summary
Seed moisture was generally insensitive to burndown timing.
- Taxon
- soybeanGlycine maxt0
- Treatment
- burndown timinge0
- Outcome
- Seed moisture contente0
- Direction
- insensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed moisture content was generally insensitive to burndown timing”
t0“Soybean”
The same questions in other papers
fire · growth · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
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fire · yield · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
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5 papers more in this group
See all 9 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.