Abstract
SUMMARY A field experiment was done in 1974 to determine the effect of the presence of weeds for different periods on the yield of field beans ( Vicia faba cv. Maris Bead). A critical period of weed competition of 2 wk duration occurred from 3 to 5 wk after 50% crop emergence. When weeds were not controlled, seed yield was reduced by 46%, from 4–6 to 2–5 t/ha. In another experiment, in 1975, there was no evidence of a critical period. Seed yield was reduced by 48%, from 2–9 to 1–5 t/ha, when weeds were not controlled. Pre‐emergence applications of simazine and of dimefuron, a new soil‐residual herbicide, effectively controlled weeds and bean seed yields were similar to those of the regularly hand‐weeded control. Dinoseb‐acetate and early, but not late, post‐emergence applications of dimefuron controlled weeds satisfactorily. Dimefuron is potentially useful in spring‐sown field beans because it can be applied pre‐ or early post‐emergence without damaging the crop.
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Claims 12
Claim · model-written summary
A two-week critical weed competition period occurred three to five weeks after 50% crop emergence in 1974.
Verbatim
e0“A critical period of weed competition of 2 wk duration occurred from 3 to 5 wk after 50% crop emergence.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Uncontrolled weeds reduced 1974 bean seed yield by 46%.
- Taxon
- field beanst0
- Treatment
- weeds were not controllede0
- Interactor
- weedse0weed
- Outcome
- seed yielde0
- Direction
- reducede0
- Value
- 46%e0
- Qualifier
- from 4–6 to 2–5 t/hae0
Not reportedComparator
Verbatim
e0“When weeds were not controlled, seed yield was reduced by 46%, from 4–6 to 2–5 t/ha.”
t0“field beans (Vicia faba)”
Claim · model-written summary
The 1975 experiment found no evidence of a critical weed competition period.
Verbatim
e0“In another experiment, in 1975, there was no evidence of a critical period.”
t0“weed populations in spring‐sown field beans (Vicia faba)”
Claim · model-written summary
Uncontrolled weeds reduced 1975 seed yield by 48%.
- Taxon
- field beanst0
- Treatment
- weeds were not controllede0
- Interactor
- weedse0weed
- Outcome
- Seed yielde0
- Direction
- reducede0
- Value
- 48%e0
- Qualifier
- from 2–9 to 1–5 t/hae0
Not reportedComparator
Verbatim
e0“Seed yield was reduced by 48%, from 2–9 to 1–5 t/ha, when weeds were not controlled.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Pre-emergence simazine controlled weeds effectively.
- Taxon
- field beanst0
- Treatment
- Pre‐emergence applications of simazinee0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- effectivelye0
Not reportedComparator
Verbatim
e0“Pre‐emergence applications of simazine and of dimefuron, a new soil‐residual herbicide, effectively controlled weeds and bean seed yields were similar to those of the regularly hand‐weeded control.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Pre-emergence dimefuron controlled weeds effectively.
- Taxon
- field beanst0
- Treatment
- dimefurone0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- effectivelye0
Not reportedComparator
Verbatim
e0“Pre‐emergence applications of simazine and of dimefuron, a new soil‐residual herbicide, effectively controlled weeds and bean seed yields were similar to those of the regularly hand‐weeded control.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Pre-emergence simazine gave bean seed yields similar to regular hand weeding.
Verbatim
e0“Pre‐emergence applications of simazine and of dimefuron, a new soil‐residual herbicide, effectively controlled weeds and bean seed yields were similar to those of the regularly hand‐weeded control.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Pre-emergence dimefuron gave bean seed yields similar to regular hand weeding.
Verbatim
e0“Pre‐emergence applications of simazine and of dimefuron, a new soil‐residual herbicide, effectively controlled weeds and bean seed yields were similar to those of the regularly hand‐weeded control.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Dinoseb-acetate satisfactorily controlled weeds.
- Taxon
- field beanst0
- Treatment
- Dinoseb‐acetatee0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- satisfactorilye0
Not reportedComparator
Verbatim
e0“Dinoseb‐acetate and early, but not late, post‐emergence applications of dimefuron controlled weeds satisfactorily.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Early post-emergence dimefuron satisfactorily controlled weeds.
- Taxon
- field beanst0
- Treatment
- early, but not late, post‐emergence applications of dimefurone0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- satisfactorilye0
Not reportedComparator
Verbatim
e0“Dinoseb‐acetate and early, but not late, post‐emergence applications of dimefuron controlled weeds satisfactorily.”
t0“field beans (Vicia faba)”
Claim · model-written summary
Late post-emergence dimefuron did not satisfactorily control weeds.
- Taxon
- field beanst0
- Treatment
- late, post‐emergence applications of dimefurone0
- Interactor
- weedse0weed
- Outcome
- controlled weedse0
- Direction
- not latee0
Not reportedComparator
Verbatim
e0“Dinoseb‐acetate and early, but not late, post‐emergence applications of dimefuron controlled weeds satisfactorily.”
t0“field beans (Vicia faba)”
Claim · model-written summary
The authors considered dimefuron potentially useful in spring-sown field beans because pre- or early post-emergence use did not damage the crop.
Verbatim
e0“Dimefuron is potentially useful in spring‐sown field beans because it can be applied pre‐ or early post‐emergence without damaging the crop.”
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See all 63 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.