Abstract
Abstract Small‐plot trials with formulations of ethyl ester and the trimethylamine salt of 2 : 4‐dichlorophenoxyacetic acid (2,4‐D) are described. These showed that the ester was more effective than the amine salt against individual weed species at rates of application of 1/2 lb./acre or less. The final result on mixed weed populations was considerably influenced, however, by the species present and the intensity of competition. These results are shown to be applicable on a larger scale by a brief summary of the results of more extensive field trials. Information on crop toxicity obtained from these trials shows that the ester offers a narrower safety margin but there is little risk of damage in wheat and barley if a rate of 1/2 lb./acre is not exceeded. The danger from volatility is shown to be slight in this country and the importance of formulation is very briefly discussed. Finally it is shown that these results compare fairly closely to official American recommendations.
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Claims 5
Claim · model-written summary
The ester formulation controlled individual weed species more effectively than the amine salt at up to 1/2 lb./acre.
- Taxon
- wheat and barley
.jpg?width=60)
Hordeum vulgare
Triticum aestivume1 - Treatment
- estere0
- Interactor
- weed speciese0weed
- Outcome
- individual weed speciese0
- Direction
- more effectivee0
- Value
- 1/2 lb./acree0
- Comparator
- amine salte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the ester was more effective than the amine salt against individual weed species at rates of application of 1/2 lb./acre or less”
e1“damage in wheat and barley”
Claim · model-written summary
The weed control result on mixed populations depended considerably on species composition and competition.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume1
- Interactor
- mixed weed populationse0weed
- Outcome
- final result on mixed weed populationse0
- Qualifier
- species present and the intensity of competitione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The final result on mixed weed populations was considerably influenced, however, by the species present and the intensity of competition.”
e1“damage in wheat and barley”
Claim · model-written summary
The ester offered a narrower crop safety margin than the amine salt.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume2
- Treatment
- estere0
- Outcome
- safety margine0
- Direction
- narrowere0
- Comparator
- trimethylamine salte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ester offers a narrower safety margin”
e1“ethyl ester and the trimethylamine salt of 2 : 4‐dichlorophenoxyacetic acid (2,4‐D)”
e2“damage in wheat and barley”
Claim · model-written summary
Wheat and barley had little damage risk at application rates no greater than 1/2 lb./acre.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume0
- Outcome
- little risk of damagee0
- Value
- 1/2 lb./acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is little risk of damage in wheat and barley if a rate of 1/2 lb./acre is not exceeded”
Claim · model-written summary
Volatility danger from the formulation was slight in the study country.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume1
- Outcome
- danger from volatilitye0
- Direction
- slighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The danger from volatility is shown to be slight in this country”
e1“damage in wheat and barley”
The same questions in other papers
ester · weed · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- positive
ester · weed · Triticum aestivum (wheat)Results agree
9 papers in the same direction as this paper
- positive
- positive
- positive
6 papers more in this group
See all 10 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.