Abstract
Field and greenhouse studies conducted in North Carolina in 1981 and 1982 evaluated the effect of the dimethylamine salt of 2,4-DB [4-(2,4-dichlorophenoxy) butyric acid] on soybeans. In the field, 2,4-DB at and above 0.07 kg ae/ha reduced soybean shoot mass, leaf nitrogen levels, and nodule activity. Soybean seed yields were reduced by 2,4-DB at and above 0.07 kg/ha. In greenhouse studies, total nodule activity was reduced by 0.07 and 0.14 kg/ha of 2,4-DB. Soybeans treated with 2,4-DB at initiation of flowering (R1 stage) or when pods were 1.9 cm long (R4 stage) yielded progeny with visible injury symptoms. Seedling emergence was also reduced in progeny of soybeans.
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Claims 5
Claim · model-written summary
2,4-DB at and above 0.07 kg ae/ha reduced soybean shoot mass, leaf nitrogen levels and nodule activity in the field.
- Taxon
- Glycine max
Glycine maxt0 - Treatment
- 2,4-DB at and above 0.07 kg ae/hae1
- Outcome
- soybean shoot mass, leaf nitrogen levels, and nodule activitye1
- Direction
- reducede1
- Setting
- North Carolinae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybeans (Glycine max)”
e1“In the field, 2,4-DB at and above 0.07 kg ae/ha reduced soybean shoot mass, leaf nitrogen levels, and nodule activity”
e6“Field and greenhouse studies conducted in North Carolina in 1981 and 1982”
Claim · model-written summary
2,4-DB at and above 0.07 kg/ha reduced soybean seed yields.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- 2,4-DB at and above 0.07 kg/hae2
- Outcome
- seed yieldse2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybeans (Glycine max)”
e2“Soybean seed yields were reduced by 2,4-DB at and above 0.07 kg/ha”
Claim · model-written summary
In the greenhouse, 0.07 and 0.14 kg/ha of 2,4-DB reduced total nodule activity.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- 0.07 and 0.14 kg/ha of 2,4-DBe3
- Outcome
- total nodule activitye3
- Direction
- reducede3
- Setting
- greenhouse studiese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybeans (Glycine max)”
e3“In greenhouse studies, total nodule activity was reduced by 0.07 and 0.14 kg/ha of 2,4-DB”
Claim · model-written summary
Soybeans treated with 2,4-DB at R1 or R4 stage yielded progeny with visible injury symptoms.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- 2,4-DB at initiation of flowering (R1 stage)e4
- Outcome
- progeny with visible injury symptomse4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybeans (Glycine max)”
e4“Soybeans treated with 2,4-DB at initiation of flowering (R1 stage) or when pods were 1.9 cm long (R4 stage) yielded progeny with visible injury symptoms”
Claim · model-written summary
Seedling emergence was reduced in progeny of soybeans treated with 2,4-DB.
- Taxon
- Glycine maxGlycine maxt0
- Material
- progeny of soybeanse5
- Outcome
- Seedling emergencee5
- Direction
- reducede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybeans (Glycine max)”
e5“Seedling emergence was also reduced in progeny of soybeans”
The same questions in other papers
stage · crop injury · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 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.