Abstract
Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina. A survey was conducted in North Carolina during fall 2010 to estimate the magnitude of this problem. Palmer amaranth was present in 39% of 2,512 fields representing 0.24% of soybean ha in North Carolina. In recent years, growers have reduced soybean seeding rates in an effort to decrease production costs associated with technology fees. However, given the increase in prevalence of Palmer amaranth and the difficultly in controlling this weed due to herbicide resistance, growers may need to reconsider reductions in seeding rates. Therefore, research was conducted during 2010 and 2011 to determine if Palmer amaranth control, soybean yield, and economic return were affected by soybean plant population, preemergence (PRE) and postemergence (POST) herbicides, and herbicide resistant traits (glufosinate-resistant and glyphosate-resistant cultivars). Applying PRE or POST herbicides and increasing soybean population increased Palmer amaranth control, soybean yield, and economic return when compared with POST herbicides only or when lower soybean populations were present. Efficacy of glufosinate and glyphosate did not vary in most instances, most likely because these herbicides were applied timely, and the frequency of glyphosate resistance did not exceed 10% in these fields.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Palmer amaranth was present in 39% of 2,512 surveyed soybean fields in North Carolina.
- Taxon
- soybean
Glycine maxe0 - Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth was presente1
- Value
- 39%e1
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e1“Palmer amaranth was present in 39% of 2,512 fields representing 0.24% of soybean ha in North Carolina”
Claim · model-written summary
Palmer amaranth represented 0.24% of soybean area in North Carolina.
- Taxon
- soybeanGlycine maxe0
- Interactor
- Palmer amaranthe0weed
- Outcome
- soybean hae1
- Value
- 0.24%e1
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e1“Palmer amaranth was present in 39% of 2,512 fields representing 0.24% of soybean ha in North Carolina”
Claim · model-written summary
PRE or POST herbicide programs increased Palmer amaranth control, soybean yield and economic return compared with POST herbicides only.
- Taxon
- soybeanGlycine maxe0
- Treatment
- PRE or POST herbicidese2
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth control, soybean yield, and economic returne2
- Direction
- increasede2
- Comparator
- POST herbicides onlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e2“Applying PRE or POST herbicides and increasing soybean population increased Palmer amaranth control, soybean yield, and economic return when compared with POST herbicides only or when lower soybean populations were present”
Claim · model-written summary
Increasing soybean population increased Palmer amaranth control, soybean yield and economic return compared with lower populations.
- Taxon
- soybeanGlycine maxe0
- Treatment
- increasing soybean populatione2
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth control, soybean yield, and economic returne2
- Direction
- increasede2
- Comparator
- lower soybean populationse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e2“Applying PRE or POST herbicides and increasing soybean population increased Palmer amaranth control, soybean yield, and economic return when compared with POST herbicides only or when lower soybean populations were present”
Claim · model-written summary
Glufosinate and glyphosate gave similar efficacy in most instances.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glufosinatee3
- Outcome
- Efficacye3
- Direction
- did not varye3
- Qualifier
- in most instancese3
- Comparator
- glyphosatee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e3“Efficacy of glufosinate and glyphosate did not vary in most instances”
Claim · model-written summary
The frequency of glyphosate resistance in Palmer amaranth did not exceed 10% in the surveyed fields.
- Taxon
- soybeanGlycine maxe0
- Interactor
- Palmer amaranthe0weed
- Outcome
- frequency of glyphosate resistancee4
- Value
- 10%e4
- Qualifier
- did not exceede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth ( Amaranthus palmeri S. Wats) has become one of the most prominent and difficult weeds to control in soybean ( Glycine max (L.) Merr.) in North Carolina”
e4“the frequency of glyphosate resistance did not exceed 10% in these fields”
The same questions in other papers
glufosinate · control · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 31 reporting no difference from an alternative
- positive
- positive
- positive
31 papers more in this group
See all 35 papers →herbicide · control · Glycine max (soybean)Positive and negative results
98 papers in the same direction as this paper · 18 in the opposite direction · 6 reporting no difference from an alternative
- positive
- negative
- negative
119 papers more in this group
See all 123 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.