Abstract
Field experiments were conducted at Warooka and Rudall on the Yorke and Eyre Peninsula of South Australia during 2004 and 2005 to investigate the effectiveness of metribuzin for the selective control of rigid brome in no-till sown barley. Metribuzin (135 to 203 g ai/ha) incorporated by sowing (IBS) was more effective in controlling rigid brome (> 67%) than the same herbicide dose applied POST. Although IBS metribuzin at the highest rate (270 g/ha) provided effective weed control (82 to 90%), it was more phytotoxic to barley, reducing crop density by 23% relative to the nontreated control at Rudall. Soil at Rudall had low clay and organic matter content. In contrast, tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBS, provided reliable rigid brome control (89 to 93%) and resulted in little crop damage (< 5%). Over the site-by-year combinations studied, all herbicide-treated barley at Warooka and Rudall yielded 6 to 50% more grain than the nontreated crop. Although metribuzin provides growers with an opportunity to selectively control rigid brome in no-till barley, high rates (≥ 203 g/ha) of this herbicide on sandy textured soils can result in significant crop damage.Nomenclature: Metribuzin, rigid brome, Bromus rigidus Roth BRORI, barley, Hordeum vulgare L
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Claims 7
Claim · model-written summary
IBS metribuzin controlled rigid brome by over 67%, more than POST application.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- Metribuzin (135 to 203 g ai/ha) incorporated by sowing (IBS)e0
- Interactor
- rigid bromee0weed
- Outcome
- controlling rigid bromee0
- Direction
- more effectivee0
- Value
- > 67%e0
- Comparator
- same herbicide dose applied POSTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Metribuzin (135 to 203 g ai/ha) incorporated by sowing (IBS) was more effective in controlling rigid brome (> 67%) than the same herbicide dose applied POST.”
t0“Barley”
Claim · model-written summary
High-rate IBS metribuzin gave 82 to 90% weed control.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- IBS metribuzin at the highest rate (270 g/ha)e0
- Interactor
- rigid bromet0weed
- Outcome
- weed controle0
- Direction
- effectivee0
- Value
- 82 to 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although IBS metribuzin at the highest rate (270 g/ha) provided effective weed control (82 to 90%), it was more phytotoxic to barley, reducing crop density by 23% relative to the nontreated control at Rudall.”
t0“rigid brome”
Claim · model-written summary
High-rate IBS metribuzin reduced barley density by 23% at Rudall.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- IBS metribuzin at the highest rate (270 g/ha)e0
- Outcome
- crop densitye0
- Direction
- reducinge0
- Value
- 23%e0
- Comparator
- nontreated controle0
- Setting
- Rudalle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although IBS metribuzin at the highest rate (270 g/ha) provided effective weed control (82 to 90%), it was more phytotoxic to barley, reducing crop density by 23% relative to the nontreated control at Rudall.”
Claim · model-written summary
IBS metribuzin plus pendimethalin controlled rigid brome by 89 to 93%.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBSe0
- Interactor
- rigid bromee0weed
- Outcome
- rigid brome controle0
- Direction
- reliablee0
- Value
- 89 to 93%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBS, provided reliable rigid brome control (89 to 93%) and resulted in little crop damage (< 5%).”
t0“Barley”
Claim · model-written summary
IBS metribuzin plus pendimethalin caused less than 5% crop damage.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBSe0
- Outcome
- crop damagee0
- Direction
- littlee0
- Value
- < 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBS, provided reliable rigid brome control (89 to 93%) and resulted in little crop damage (< 5%).”
t0“Barley”
Claim · model-written summary
Herbicide-treated barley yielded 6 to 50% more grain than untreated barley.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- herbicide-treatede0
- Outcome
- graine0
- Direction
- moree0
- Value
- 6 to 50%e0
- Comparator
- nontreated crope0
- Setting
- Warooka and Rudalle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over the site-by-year combinations studied, all herbicide-treated barley at Warooka and Rudall yielded 6 to 50% more grain than the nontreated crop.”
Claim · model-written summary
High metribuzin rates on sandy soils can substantially damage barley.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- high rates (≥ 203 g/ha)e0
- Outcome
- crop damagee0
- Qualifier
- sandy textured soilse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high rates (≥ 203 g/ha) of this herbicide on sandy textured soils can result in significant crop damage.”
t0“Barley”
The same questions in other papers
pendimethalin · pest · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- no effect
metribuzin · control · Hordeum vulgare (barley)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
metribuzin · weed · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- positive
herbicide · yield · Hordeum vulgare (barley)Results differ
41 papers in the same direction as this paper · 19 in the opposite direction
- no effect
- no effect
- no effect
57 papers more in this group
See all 61 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.