Abstract
Field experiments were conducted at five western Canadian locations in 1996 and 1997 to compare weed control and canola (Brassica napus L.) seed yields in the three major her-bicide-tolerant canola (HTC) systems. The main objective of this study was to determine if significant weed control and yield advantages could be expected by using herbicides "designated" for HTC compared to a more "standard" application of sethoxydim plus ethametsulfuron. In 3 of 10 site-years, glyphosate in Quest canola and imazethapyr/imazamox in 45A71 canola provided a yield advantage over the standard treatment. The yield advantages were restricted to the Lacombe and Lethbridge sites and ranged from 13 to 39% increases over the sethoxydim plus ethametsulfuron treatments. Among the HTC, weed control was usually greatest with glyphosate, followed by imazethapyr/imazamox, and then glufosinate. Glufosinate efficacy was often restricted due to advanced growth stages on some weeds. The standard treatment of sethoxydim plus ethametsulfuron did not provide better weed control than glyphosate, but in some cases did improve weed control compared to imazethapyr/imazamox or glufosinate. The HTC provide growers with new opportunities for the control of difficult weeds along with the option to employ in-crop herbicides with new modes of action in canola. Key words: Weed management, transgenic canola
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Claims 7
Claim · model-written summary
Glyphosate in Quest canola gave a 13 to 39% yield advantage over the standard herbicide treatment in 3 of 10 site-years.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Material
- Queste0
- Treatment
- glyphosatee0
- Outcome
- yielde0
- Direction
- increasese1
- Value
- 13 to 39%e1
- Qualifier
- In 3 of 10 site-yearse0
- Comparator
- sethoxydim plus ethametsulfurone1
- Setting
- Lacombe and Lethbridge sitese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In 3 of 10 site-years, glyphosate in Quest canola and imazethapyr/imazamox in 45A71 canola provided a yield advantage over the standard treatment”
e1“The yield advantages were restricted to the Lacombe and Lethbridge sites and ranged from 13 to 39% increases over the sethoxydim plus ethametsulfuron treatments”
Claim · model-written summary
Imazethapyr/imazamox in 45A71 canola gave a 13 to 39% yield advantage over the standard herbicide treatment in 3 of 10 site-years.
- Taxon
- canolaBrassica napus var. napuse0
- Material
- 45A71e0
- Treatment
- imazethapyr/imazamoxe0
- Outcome
- yielde0
- Direction
- increasese1
- Value
- 13 to 39%e1
- Qualifier
- In 3 of 10 site-yearse0
- Comparator
- sethoxydim plus ethametsulfurone1
- Setting
- Lacombe and Lethbridge sitese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 3 of 10 site-years, glyphosate in Quest canola and imazethapyr/imazamox in 45A71 canola provided a yield advantage over the standard treatment”
e1“The yield advantages were restricted to the Lacombe and Lethbridge sites and ranged from 13 to 39% increases over the sethoxydim plus ethametsulfuron treatments”
Claim · model-written summary
Among herbicide-tolerant canola systems, glyphosate gave the greatest weed control, followed by imazethapyr/imazamox and then glufosinate.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- glyphosatee2
- Outcome
- weed controle2
- Direction
- greateste2
- Comparator
- imazethapyr/imazamoxe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Among the HTC, weed control was usually greatest with glyphosate, followed by imazethapyr/imazamox, and then glufosinate”
e0“compare weed control and canola (Brassica napus L.) seed yields”
Claim · model-written summary
Glufosinate efficacy was often restricted in canola by advanced growth stages of some weeds.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- glufosinatee3
- Outcome
- efficacye3
- Direction
- restrictede3
- Qualifier
- advanced growth stages on some weedse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Glufosinate efficacy was often restricted due to advanced growth stages on some weeds”
e0“canola (Brassica napus L.)”
Claim · model-written summary
The standard sethoxydim plus ethametsulfuron treatment did not give better weed control than glyphosate in canola.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- sethoxydim plus ethametsulfurone4
- Outcome
- weed controle4
- Direction
- did not provide bettere4
- Comparator
- glyphosatee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The standard treatment of sethoxydim plus ethametsulfuron did not provide better weed control than glyphosate”
e0“canola (Brassica napus L.)”
Claim · model-written summary
The standard sethoxydim plus ethametsulfuron treatment improved weed control over imazethapyr/imazamox or glufosinate in some cases.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- sethoxydim plus ethametsulfurone5
- Outcome
- weed controle4
- Direction
- did improvee4
- Qualifier
- in some casese4
- Comparator
- imazethapyr/imazamox or glufosinatee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“but in some cases did improve weed control compared to imazethapyr/imazamox or glufosinate”
e0“canola (Brassica napus L.)”
e5“The standard treatment of sethoxydim plus ethametsulfuron”
Claim · model-written summary
Herbicide-tolerant canola systems give growers new opportunities to control difficult weeds.
- Taxon
- canolaBrassica napus var. napuse5
- Outcome
- control of difficult weedse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The HTC provide growers with new opportunities for the control of difficult weeds along with the option to employ in-crop herbicides with new modes of action in canola”
The same questions in other papers
glyphosate · yield · Brassica napus (oilseed rape)Results differ
5 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- no effect
5 papers more in this group
See all 9 papers →Imazethapyr · yield · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →glufosinate · control · Brassica napus (oilseed rape)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 papers →imazamox · yield · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
glyphosate · weed · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.