Abstract
Field experiments were established at four locations in Iran to evaluate the efficacy of metribuzin in controlling weeds in winter wheat. Metribuzin was applied either post-emergence (POST) or pre-emergence (PRE) at 0, 0.35, 0.52 and 0.70 g a.i. ha-1. At each location three conventionally planted wheat cultivars were tested. In most cases weed control increased with metribuzin rate following a linear or curvilinear trend with an application rate of 0.5 kg ha−1 a.i. providing an acceptable level of control. PRE applied metribuzin resulted in better control of weeds at Ahvaz while POST treatments were more effective at Karaj with no differences between PRE and POST treatments at two other locations (Zabol and Gorgan). Wheat yields increased with metribuzin rate at two locations (Ahvaz and Zabol) or showed minor (Karaj) to no changes (Gorgan) across application rates. Wheat yields were higher in PRE treated plots than in POST at Ahvaz, but lower at Karaj and did not vary at Zabol (with one exception) or Gorgan. Wheat cultivars also varied in their responses to metribuzin application rate or timing. Finally, metribuzin could be applied at 0.5 kg ha-1 a.i. (regardless of application timing) but not at higher rates at Ahvaz and Karaj, although higher rates at Zabol and Gorgan could provide both an acceptable level of weed control and wheat yield gain as well.
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Claims 12
Claim · model-written summary
Weed control generally increased with metribuzin rate, and 0.5 kg ha−1 a.i. gave acceptable control.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- metribuzin ratee0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- increasede0
- Value
- 0.5 kg ha−1 a.i.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In most cases weed control increased with metribuzin rate following a linear or curvilinear trend with an application rate of 0.5 kg ha−1 a.i. providing an acceptable level of control.”
t0“Wheat”
Claim · model-written summary
Pre-emergence metribuzin gave better weed control at Ahvaz.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- PRE applied metribuzine0
- Interactor
- weedse0weed
- Outcome
- control of weedse0
- Direction
- bettere0
- Comparator
- POST treatmentse0
- Setting
- Ahvaze0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRE applied metribuzin resulted in better control of weeds at Ahvaz while POST treatments were more effective at Karaj with no differences between PRE and POST treatments at two other locations (Zabol and Gorgan).”
t0“Wheat”
Claim · model-written summary
Post-emergence metribuzin gave better weed control at Karaj.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- POST treatmentse0
- Interactor
- weedse0weed
- Outcome
- control of weedse0
- Direction
- more effectivee0
- Comparator
- PRE applied metribuzine0
- Setting
- Karaje0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRE applied metribuzin resulted in better control of weeds at Ahvaz while POST treatments were more effective at Karaj with no differences between PRE and POST treatments at two other locations (Zabol and Gorgan).”
t0“Wheat”
Claim · model-written summary
Pre- and post-emergence metribuzin gave similar weed control at Zabol and Gorgan.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- PREe0
- Outcome
- no differencese0
- Direction
- no differencese0
- Comparator
- POST treatmentse0
- Setting
- Zabol and Gorgane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no differences between PRE and POST treatments at two other locations (Zabol and Gorgan)”
t0“Wheat”
Claim · model-written summary
Wheat yield increased with metribuzin rate at Ahvaz and Zabol.
- Taxon
- WheatTriticum aestivume0
- Treatment
- metribuzin ratee0
- Outcome
- Wheat yieldse0
- Direction
- increasede0
- Setting
- Ahvaz and Zabole0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields increased with metribuzin rate at two locations (Ahvaz and Zabol)”
Claim · model-written summary
Wheat yield changed little with metribuzin rate at Karaj.
- Taxon
- WheatTriticum aestivume0
- Treatment
- application ratese0
- Outcome
- Wheat yieldse0
- Direction
- minore0
- Setting
- Karaje0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields increased with metribuzin rate at two locations (Ahvaz and Zabol) or showed minor (Karaj) to no changes (Gorgan) across application rates.”
Claim · model-written summary
Wheat yield did not change across metribuzin rates at Gorgan.
- Taxon
- WheatTriticum aestivume0
- Treatment
- application ratese0
- Outcome
- Wheat yieldse0
- Direction
- no changese0
- Setting
- Gorgane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields increased with metribuzin rate at two locations (Ahvaz and Zabol) or showed minor (Karaj) to no changes (Gorgan) across application rates.”
Claim · model-written summary
Pre-emergence plots had higher wheat yield than post-emergence plots at Ahvaz.
- Taxon
- WheatTriticum aestivume0
- Treatment
- PRE treated plotse0
- Outcome
- Wheat yieldse0
- Direction
- highere0
- Comparator
- POSTe0
- Setting
- Ahvaze0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields were higher in PRE treated plots than in POST at Ahvaz”
Claim · model-written summary
Pre-emergence plots had lower wheat yield than post-emergence plots at Karaj.
- Taxon
- WheatTriticum aestivume0
- Treatment
- PRE treated plotse0
- Outcome
- Wheat yieldse0
- Direction
- lowere0
- Comparator
- POSTe0
- Setting
- Karaje0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields were higher in PRE treated plots than in POST at Ahvaz, but lower at Karaj”
Claim · model-written summary
Wheat yields mostly did not vary by metribuzin timing at Zabol or Gorgan.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- PREe0
- Outcome
- Wheat yieldse0
- Direction
- did not varye0
- Qualifier
- with one exceptione0
- Comparator
- POSTe0
- Setting
- Zabole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat yields were higher in PRE treated plots than in POST at Ahvaz, but lower at Karaj and did not vary at Zabol (with one exception) or Gorgan.”
t0“Wheat”
Claim · model-written summary
Wheat cultivars varied in response to metribuzin rate or timing.
- Taxon
- WheatTriticum aestivume0
- Material
- Wheat cultivarse0
- Outcome
- responses to metribuzin application rate or timinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat cultivars also varied in their responses to metribuzin application rate or timing.”
Claim · model-written summary
The authors recommended 0.5 kg ha-1 a.i. metribuzin at Ahvaz and Karaj, but allowed higher rates at Zabol and Gorgan.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- metribuzin could be applied at 0.5 kg ha-1 a.i.e0
- Setting
- Ahvaz and Karaje0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“metribuzin could be applied at 0.5 kg ha-1 a.i. (regardless of application timing) but not at higher rates at Ahvaz and Karaj, although higher rates at Zabol and Gorgan could provide both an acceptable level of weed control and wheat yield gain as well.”
t0“Wheat”
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