Abstract
Abstract The objective of this work was to determine the interference and economic damage threshold of smooth pigweed (Amaranthus hybridus) in soybean. The experiments were carried out in two agricultural harvests (2020/2021 and 2021/2022) in an area with natural infestation of smooth pigweed. The treatments consisted of different levels of smooth pigweed infestation (0, 1, 3, 6, 9, and 12 plants per square meter) in an area cultivated with soybean. The design was completely randomized with ten replicates. The analyzed variables were: number of pods per plant; grains per pod; and soybean grain yield, converted into loss percentage in relation to the controls without the presence of smooth pigweed. One smooth pigweed plant per square meter can reduce soybean yield, on average, by 4.32 to 5.09%, whereas the presence of 12 plants per square meter reduces soybean yield by 36.03 to 37.93%. The economic damage threshold of smooth pigweed in soybean occurs in the range of 0.35 to 0.93 plants per square meter. When the cost of control is lower, the economic damage threshold is achieved with smaller infestations of 0.36 plants per square meter. However, when the cost of control is high, the economic damage threshold becomes economically viable with larger infestations above 0.63 plants per square meter.
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Claims 5
Claim · model-written summary
One smooth pigweed plant per square meter reduced soybean yield by 4.32 to 5.09% relative to weed-free controls.
- Taxon
- soybean
Glycine maxe0 - Treatment
- One smooth pigweed plant per square metere0
- Interactor
- smooth pigweed
Amaranthus hybriduse5weed - Outcome
- soybean yielde0
- Direction
- reducee0
- Value
- 4.32 to 5.09%e0
- Comparator
- controls without the presence of smooth pigweede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One smooth pigweed plant per square meter can reduce soybean yield, on average, by 4.32 to 5.09%”
e5“in relation to the controls without the presence of smooth pigweed”
Claim · model-written summary
Twelve smooth pigweed plants per square meter reduced soybean yield by 36.03 to 37.93% relative to weed-free controls.
- Taxon
- soybeanGlycine maxe1
- Treatment
- 12 plants per square metere1
- Interactor
- smooth pigweedAmaranthus hybriduse5weed
- Outcome
- soybean yielde1
- Direction
- reducese1
- Value
- 36.03 to 37.93%e1
- Comparator
- controls without the presence of smooth pigweede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“whereas the presence of 12 plants per square meter reduces soybean yield by 36.03 to 37.93%”
e5“in relation to the controls without the presence of smooth pigweed”
Claim · model-written summary
The economic damage threshold of smooth pigweed in soybean lies between 0.35 and 0.93 plants per square meter.
- Taxon
- soybeanGlycine maxe2
- Interactor
- smooth pigweedAmaranthus hybriduse2weed
- Outcome
- economic damage thresholde2
- Value
- 0.35 to 0.93 plants per square metere2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The economic damage threshold of smooth pigweed in soybean occurs in the range of 0.35 to 0.93 plants per square meter”
Claim · model-written summary
When the cost of control is lower, the economic damage threshold of smooth pigweed in soybean is reached at 0.36 plants per square meter.
- Taxon
- soybeanGlycine maxe2
- Interactor
- smooth pigweedAmaranthus hybriduse2weed
- Outcome
- economic damage thresholde3
- Value
- 0.36 plants per square metere3
- Qualifier
- When the cost of control is lowere3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The economic damage threshold of smooth pigweed in soybean occurs in the range of 0.35 to 0.93 plants per square meter”
e3“When the cost of control is lower, the economic damage threshold is achieved with smaller infestations of 0.36 plants per square meter”
Claim · model-written summary
When the cost of control is high, the economic damage threshold of smooth pigweed in soybean becomes economically viable only above 0.63 plants per square meter.
- Taxon
- soybeanGlycine maxe2
- Interactor
- smooth pigweedAmaranthus hybriduse2weed
- Outcome
- economic damage thresholde4
- Value
- above 0.63 plants per square metere4
- Qualifier
- when the cost of control is highe4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The economic damage threshold of smooth pigweed in soybean occurs in the range of 0.35 to 0.93 plants per square meter”
e4“However, when the cost of control is high, the economic damage threshold becomes economically viable with larger infestations above 0.63 plants per square meter”
The same questions in other papers
Amaranthus hybridus · yield · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- 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.