Abstract
Weed control in no-till soybeans [ Glycine max (L.) Merr. ‘Wells’] planted into shredded corn ( Zea mays L.) residue was evaluated at Concord, NE, over a 3-yr period. Herbicide factors evaluated were time of herbicide application for no-till soybeans, efficacy of glyphosate [ N -(phosphonomethyl)glycine] relative to paraquat (1,1’-dimethyl-4,4’-bipyridinium ion) for control of emerged weeds, and the efficacy of alachlor [2-chloro-2’,6’-diethyl- N -(methoxymethyl)acetanilide], metolachlor [2-chloro- N -(2-ethyl-6-methylphenyl)- N -(2-methoxy-1-methylethyl)acetamide], oryzalin (3,5-dinitro- N 4 , N 4 -dipropylsulfanilamide), and pendimethalin [ N -(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] for residual weed control. Combination residual and contact herbicide treatments were applied either as a preplant surface application or preemergence after no-till-planted soybeans. Removal of existing weed growth was not consistently better with the preplant surface application compared to later removal after soybean planting. Paraquat and glyphosate gave nearly equal control of emerged weeds. Addition of 2,4-D [(2,4-dichlorophenoxy)acetic acid] with paraquat in the tank mix did not improve weed control. Use of narrow, ripple coulters on the no-till planter resulted in minimal disturbance of the preplant surface herbicide so that additional preemergence herbicide at planting was seldom beneficial.
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Claims 5
Claim · model-written summary
Preplant herbicide application did not consistently improve removal of existing weeds over removal after planting.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- preplant surface applicatione0
- Interactor
- weede0weed
- Outcome
- Removal of existing weed growthe0
- Direction
- not consistently bettere0
- Comparator
- later removal after soybean plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max)”
e0“Removal of existing weed growth was not consistently better with the preplant surface application compared to later removal after soybean planting.”
Claim · model-written summary
Paraquat and glyphosate controlled emerged weeds nearly equally.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Paraquate1
- Interactor
- weedse1weed
- Outcome
- control of emerged weedse1
- Direction
- nearly equale1
- Comparator
- glyphosatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max)”
e1“Paraquat and glyphosate gave nearly equal control of emerged weeds.”
Claim · model-written summary
Adding 2,4-D to paraquat did not improve weed control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Addition of 2,4-D [(2,4-dichlorophenoxy)acetic acid] with paraquate2
- Interactor
- weede2weed
- Outcome
- weed controle2
- Direction
- did not improvee2
- Comparator
- paraquate2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max)”
e2“Addition of 2,4-D [(2,4-dichlorophenoxy)acetic acid] with paraquat in the tank mix did not improve weed control.”
Claim · model-written summary
Narrow ripple coulters caused minimal disturbance of the preplant surface herbicide.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- narrow, ripple coulterse3
- Outcome
- disturbance of the preplant surface herbicidee3
- Direction
- minimale3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max)”
e3“Use of narrow, ripple coulters on the no-till planter resulted in minimal disturbance of the preplant surface herbicide so that additional preemergence herbicide at planting was seldom beneficial.”
Claim · model-written summary
Additional preemergence herbicide at planting was seldom beneficial with narrow ripple coulters.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- narrow, ripple coulterse3
- Outcome
- additional preemergence herbicide at planting was seldom beneficiale3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean (Glycine max)”
e3“Use of narrow, ripple coulters on the no-till planter resulted in minimal disturbance of the preplant surface herbicide so that additional preemergence herbicide at planting was seldom beneficial.”
The same questions in other papers
paraquat · weed · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
- negative
1 paper more in this group
See all 5 papers →2,4-D · weed · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
2 papers more in this group
See all 6 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.