Abstract
Field trials were conducted in Virginia to evaluate trumpetcreeper control with glyphosate and conventional herbicide systems in double-crop glyphosate-resistant soybean. When compared with the untreated control, none of the conventional herbicide systems evaluated in these trials provided any reductions in the trumpetcreeper stem density at 1 yr after treatment (YAT). Glyphosate systems generally provided much higher levels of trumpetcreeper stem reduction than conventional herbicide systems. By 1 YAT, densities of trumpetcreeper that received conventional herbicide treatments ranged from 97 to 141% of the initial population, whereas densities of trumpetcreeper that received preemergence (PRE) followed by postemergence (POST) or POST-only applications of the isopropylamine (IPA) or diammonium (DIA) salts of glyphosate ranged from 30 to 66% of the initial population. However, PRE applications of the IPA or DIA salts of glyphosate generally provided lower levels of trumpetcreeper stem reduction than PRE followed by POST or POST-only applications. These results indicate that glyphosate applications made later in the growing season will provide greater trumpetcreeper stem reductions than those made at or close to soybean planting in double-crop soybean production systems. Glyphosate systems did not provide higher soybean yields than the untreated control that contained trumpetcreeper only when densities averaged 6 trumpetcreeper stems/m 2 in 2000, but 12 of the 16 glyphosate-containing treatments provided higher soybean yields than the untreated control that contained trumpetcreeper only when densities averaged 13 stems/m 2 in 2001.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 8
Claim · model-written summary
Conventional herbicides did not reduce trumpetcreeper stem density after one year.
- Taxon
- soybean
Glycine maxt0 - Treatment
- conventional herbicide systemse0
- Interactor
- trumpetcreeper
Campsis radicanse0weed - Outcome
- trumpetcreeper stem densitye0
- Direction
- any reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the conventional herbicide systems evaluated in these trials provided any reductions in the trumpetcreeper stem density at 1 yr after treatment (YAT)”
t0“soybean”
Claim · model-written summary
Glyphosate reduced trumpetcreeper stems more than conventional systems.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Glyphosate systemse0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- trumpetcreeper stem reductione0
- Direction
- much highere0
- Comparator
- conventional herbicide systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate systems generally provided much higher levels of trumpetcreeper stem reduction than conventional herbicide systems”
t0“soybean”
Claim · model-written summary
Conventional herbicides left trumpetcreeper densities at 97 to 141% of initial density.
- Taxon
- soybeanGlycine maxt0
- Treatment
- conventional herbicide treatmentse0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- densities of trumpetcreepere0
- Value
- 97 to 141%e0
- Comparator
- initial populatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“densities of trumpetcreeper that received conventional herbicide treatments ranged from 97 to 141% of the initial population”
t0“soybean”
Claim · model-written summary
PRE plus POST or POST-only glyphosate left trumpetcreeper densities at 30 to 66% of initial density.
- Taxon
- soybeanGlycine maxt0
- Treatment
- preemergence (PRE) followed by postemergence (POST) or POST-only applications of the isopropylamine (IPA) or diammonium (DIA) salts of glyphosatee0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- densities of trumpetcreepere0
- Value
- 30 to 66%e0
- Comparator
- initial populatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“densities of trumpetcreeper that received preemergence (PRE) followed by postemergence (POST) or POST-only applications of the isopropylamine (IPA) or diammonium (DIA) salts of glyphosate ranged from 30 to 66% of the initial population”
t0“soybean”
Claim · model-written summary
PRE glyphosate reduced trumpetcreeper less than later applications.
- Taxon
- soybeanGlycine maxt0
- Treatment
- PRE applications of the IPA or DIA salts of glyphosatee0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- trumpetcreeper stem reductione0
- Direction
- lowere0
- Comparator
- PRE followed by POST or POST-only applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRE applications of the IPA or DIA salts of glyphosate generally provided lower levels of trumpetcreeper stem reduction than PRE followed by POST or POST-only applications”
t0“soybean”
Claim · model-written summary
The authors infer that later glyphosate applications yield greater trumpetcreeper reduction.
- Taxon
- soybeanGlycine maxe0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- glyphosate applications made later in the growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glyphosate applications made later in the growing season will provide greater trumpetcreeper stem reductions than those made at or close to soybean planting”
Claim · model-written summary
Glyphosate did not raise soybean yield at six trumpetcreeper stems per square metre in 2000.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Glyphosate systemse0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- soybean yieldse0
- Direction
- did not provide highere0
- Value
- 6 trumpetcreeper stems/m 2e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate systems did not provide higher soybean yields than the untreated control that contained trumpetcreeper only when densities averaged 6 trumpetcreeper stems/m 2 in 2000”
Claim · model-written summary
Twelve of sixteen glyphosate treatments raised soybean yields at thirteen stems per square metre in 2001.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate-containing treatmentse0
- Interactor
- trumpetcreeperCampsis radicanse0weed
- Outcome
- soybean yieldse0
- Direction
- highere0
- Value
- 13 stems/m 2e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“12 of the 16 glyphosate-containing treatments provided higher soybean yields than the untreated control that contained trumpetcreeper only when densities averaged 13 stems/m 2 in 2001”
The same questions in other papers
glyphosate · Campsis radicans · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
herbicide · Campsis radicans · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.