Abstract
An experiment was conducted in 2005 and 2006 in southwestern Ontario to examine the efficacy of imazethapyr application timing on the control of long-spined sandbur in soybean (Glycine max L. Merr.). Imazethapyr (100 g a.i. ha -1 ) was applied early and delayed preemergence (PRE), and postemergence (POST) at the spike to five-leaf stage of the weed. Soybean was not injured by any treatment. Imazethapyr applied PRE did not control long-spined sandbur; POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively, and crop yield increased 44, 28, 39, 24, 38, and 20%, respectively. Therefore, imazethapyr should be applied at the three-leaf stage of the weed to optimize control and crop yield. Key words: Weed control, soybean, preemergence herbicide, postemergence herbicide
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Claims 15
Claim · model-written summary
Soybean was not injured by imazethapyr treatments.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- imazethapyrt0
- Outcome
- injurede0
- Direction
- not injurede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean was not injured by any treatment.”
t0“imazethapyr”
Claim · model-written summary
Preemergence imazethapyr did not control long-spined sandbur.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Imazethapyr applied PREe0
- Interactor
- long-spined sandbure0weed
- Outcome
- control long-spined sandbure0
- Direction
- did not controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Imazethapyr applied PRE did not control long-spined sandbur”
t0“soybean”
Claim · model-written summary
Postemergence application at spike stage produced up to 72% sandbur control.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- spikee0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 72e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
At one-leaf stage, postemergence application produced up to 66% weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 66e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
At two-leaf stage, postemergence application produced up to 78% weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 78e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
At three-leaf stage, postemergence application produced up to 91% weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 91e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
At four-leaf stage, postemergence application produced up to 78% weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 78e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
At five-leaf stage, postemergence application produced up to 71% weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST treatmentse0
- Interactor
- long-spined sandburt1weed
- Outcome
- weed controle0
- Direction
- up toe0
- Value
- 71%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively”
t0“soybean”
t1“long-spined sandbur”
Claim · model-written summary
Crop yield increased by 44% at the spike-stage application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
Crop yield increased by 28% at the one-leaf application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
Crop yield increased by 39% at the two-leaf application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
Crop yield increased by 24% at the three-leaf application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
Crop yield increased by 38% at the four-leaf application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
Crop yield increased by 20% at the five-leaf application.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop yield increased 44, 28, 39, 24, 38, and 20%, respectively.”
t0“soybean”
t1“imazethapyr”
Claim · model-written summary
The authors recommend application at the weed three-leaf stage.
- Taxon
- soybeanGlycine maxt0
- Outcome
- applied at the three-leaf stage of the weede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“imazethapyr should be applied at the three-leaf stage of the weed to optimize control and crop yield.”
t0“soybean”
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