Abstract
Planning effective weed control in cropping systems requires exact appraisal of the weed intensity and duration of their competition with the crops. This 2‐year study was carried out in order to determine the critical weed control period in sesame fields. Related and relative crop yields were monitored and analyzed using a four‐parametric log‐logistic model. We recorded data from weed‐free plots and compared these with data from different periods of weed interference. In both the study years, the longer period of weed interference decreased the relative yield of sesame, whereas the yield was increased with increasing duration of the weed‐free period. A 51–78.7% decline in sesame yield was noted if the weeds were allowed to compete with the crop from planting to harvest. In the first year, the duration of the critical period for weed control (CPWC) was 177–820 growing degree days (GDD), which corresponded to 14–64 days after crop emergence (DAE), and between 170 and 837 GDD (13–64 DAE) in the second year; this was based on a 5% acceptable yield loss. The results of this study clearly elaborated that maintaining weed‐free conditions is compulsory from as early as the second week after the emergence of sesame plants, and this should be maintained at least until the ninth week to avoid sesame yield losses by more than 5%. These findings show that growers can benefit from CPWC to improve weed control in sesame production, including the efficacy of a weed control program and its cost.
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Claims 6
Claim · model-written summary
A longer period of weed interference decreased the relative yield of sesame.
- Taxon
- sesame
Sesamum indicumt0 - Treatment
- longer period of weed interferencee1
- Interactor
- weede1weed
- Outcome
- relative yielde1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sesame”
e1“the longer period of weed interference decreased the relative yield of sesame”
Claim · model-written summary
Sesame yield increased with increasing duration of the weed-free period.
- Taxon
- sesameSesamum indicumt0
- Treatment
- increasing duration of the weed‐free periode1
- Outcome
- yielde1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sesame”
e1“the yield was increased with increasing duration of the weed‐free period”
Claim · model-written summary
Sesame yield declined by 51-78.7% when weeds competed with the crop from planting to harvest.
- Taxon
- sesameSesamum indicume1
- Treatment
- weeds were allowed to compete with the crop from planting to harveste1
- Interactor
- weedse1weed
- Outcome
- sesame yielde1
- Direction
- declinee1
- Value
- 51–78.7%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A 51–78.7% decline in sesame yield was noted if the weeds were allowed to compete with the crop from planting to harvest”
Claim · model-written summary
In the first year the critical period for weed control lasted 177-820 growing degree days, corresponding to 14-64 days after crop emergence, at 5% acceptable yield loss.
- Taxon
- sesameSesamum indicumt0
- Outcome
- duration of the critical period for weed control (CPWC)e1
- Value
- 177–820 growing degree days (GDD)e1
- Qualifier
- 14–64 days after crop emergence (DAE)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sesame”
e1“In the first year, the duration of the critical period for weed control (CPWC) was 177–820 growing degree days (GDD), which corresponded to 14–64 days after crop emergence (DAE)”
Claim · model-written summary
In the second year the critical period for weed control lasted between 170 and 837 GDD (13-64 DAE), based on 5% acceptable yield loss.
- Taxon
- sesameSesamum indicumt0
- Outcome
- duration of the critical period for weed control (CPWC)e1
- Value
- 170 and 837 GDDe2
- Qualifier
- 5% acceptable yield losse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sesame”
e1“the duration of the critical period for weed control (CPWC)”
e2“between 170 and 837 GDD (13–64 DAE) in the second year; this was based on a 5% acceptable yield loss”
Claim · model-written summary
Weed-free conditions are recommended from as early as the second week after sesame emergence and should be kept at least until the ninth week to avoid yield losses above 5%.
- Taxon
- sesameSesamum indicume1
- Outcome
- weed‐free conditionse1
- Qualifier
- at least until the ninth weeke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maintaining weed‐free conditions is compulsory from as early as the second week after the emergence of sesame plants, and this should be maintained at least until the ninth week”
The same questions in other papers
herbicide · yield · Sesamum indicum (sesame)Positive and negative results
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- positive
- positive
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See all 67 papers →competition · yield · Sesamum indicum (sesame)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.