Abstract
Experiments were conducted to evaluate the effects of preemergence herbicides on the growth charac- teristics and competitiveness of sicklepod and common cocklebur to soybean. Alachlor was applied at 1.1 or 2.2 kg ai ha-1 and metribuzin at 0.2 or 0.4 kg ai ha-1 in glasshouse and field experiments. Alachlor at 2.2 kg ha4l reduced sicklepod dry weight and leaf area 4 weeks after planting. Sicklepod water use was initially lowered by both rates of alachlor while soybean and common cocklebur water use was initially lowered by metribuzin at 0.4 kg ha7l. Sicklepod and common cocklebur fresh weights were reduced at soybean harvest by the high rates of alachlor and metribuzin. Soybean competing with sicklepod injured by 1.1 or 2.2 kg ha-l of alachlor produced yields greater than soybean competing with untreated sicklepod. Soybean yields were not improved when metribuzin was used on common cocklebur. Nomenclature: Alachlor, 2-chloro-N-(2,6-diethylphenyl)- N-(methoxymethyl)acetamide; metribuzin, 4-amino-6- (1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one; sicklepod, Cassia obtusifolia L. #3 CASOB; soybean, Glycine max (L.) Merr. 'Gordon'; common cocklebur, Xanthium strumarium L. # XANST. Additional index words. Competition, escaped weeds, soybean, Glycine max, CASOB, XANST.
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Claims 8
Claim · model-written summary
Alachlor at 2.2 kg/ha reduced sicklepod dry weight and leaf area 4 weeks after planting in soybean.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Alachlor at 2.2 kg ha4le1
- Interactor
- sicklepode0weed
- Outcome
- sicklepod dry weight and leaf areae1
- Direction
- reducede1
- Qualifier
- 4 weeks after plantinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e1“Alachlor at 2.2 kg ha4l reduced sicklepod dry weight and leaf area 4 weeks after planting”
Claim · model-written summary
Both rates of alachlor initially lowered sicklepod water use in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- both rates of alachlore2
- Interactor
- sicklepode0weed
- Outcome
- Sicklepod water usee2
- Direction
- lowerede2
- Qualifier
- initiallye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e2“Sicklepod water use was initially lowered by both rates of alachlor”
Claim · model-written summary
Metribuzin initially lowered soybean water use in competition with common cocklebur.
- Taxon
- soybeanGlycine maxe0
- Treatment
- metribuzine3
- Interactor
- common cocklebure3weed
- Outcome
- water usee3
- Direction
- lowerede3
- Qualifier
- initiallye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e3“soybean and common cocklebur water use was initially lowered by metribuzin”
Claim · model-written summary
Metribuzin initially lowered common cocklebur water use.
- Taxon
- soybeanGlycine maxe0
- Treatment
- metribuzine3
- Interactor
- common cocklebure3weed
- Outcome
- common cocklebur water usee3
- Direction
- lowerede3
- Qualifier
- initiallye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e3“soybean and common cocklebur water use was initially lowered by metribuzin”
Claim · model-written summary
High rates of alachlor and metribuzin reduced sicklepod fresh weight at soybean harvest.
- Taxon
- soybeanGlycine maxe0
- Treatment
- high rates of alachlor and metribuzine4
- Interactor
- sicklepode4weed
- Outcome
- fresh weightse4
- Direction
- reducede4
- Qualifier
- at soybean harveste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e4“Sicklepod and common cocklebur fresh weights were reduced at soybean harvest by the high rates of alachlor and metribuzin”
Claim · model-written summary
High rates of alachlor and metribuzin reduced common cocklebur fresh weight at soybean harvest.
- Taxon
- soybeanGlycine maxe0
- Treatment
- high rates of alachlor and metribuzine4
- Interactor
- common cocklebure4weed
- Outcome
- fresh weightse4
- Direction
- reducede4
- Qualifier
- at soybean harveste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e4“Sicklepod and common cocklebur fresh weights were reduced at soybean harvest by the high rates of alachlor and metribuzin”
Claim · model-written summary
Soybean competing with sicklepod injured by 1.1 or 2.2 kg/ha of alachlor produced greater yields than soybean competing with untreated sicklepod.
- Taxon
- soybeanGlycine maxe0
- Treatment
- 1.1 or 2.2 kg ha-l of alachlore5
- Interactor
- sicklepode5weed
- Outcome
- yieldse5
- Direction
- greatere5
- Comparator
- soybean competing with untreated sicklepode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e5“Soybean competing with sicklepod injured by 1.1 or 2.2 kg ha-l of alachlor produced yields greater than soybean competing with untreated sicklepod”
Claim · model-written summary
Metribuzin used on common cocklebur did not improve soybean yields.
- Taxon
- soybeanGlycine maxe0
- Treatment
- metribuzine6
- Interactor
- common cocklebure6weed
- Outcome
- Soybean yieldse6
- Direction
- not improvede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competitiveness of sicklepod and common cocklebur to soybean”
e6“Soybean yields were not improved when metribuzin was used on common cocklebur”
The same questions in other papers
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See all 17 papers →alachlor · physiology: water · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
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metribuzin · physiology: water · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- 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.