Abstract
1. Under climatic conditions of the San Joaquin Valley of California dusting cotton plants during periods of active shedding with 100 p.p.m. of sodium 4-chlorophenoxyacetate and 1000 p.p.m. of naphthaleneacetic acid was without effect on boll retention in both 1947 and 1948. 2. Spraying plants weekly with a 20-p.p.m. solution of sodium 4-chlorophenoxyacetate, in an experiment where naphthaleneacetate and napthoxyacetate were without effect, significantly reduced the number of bolls per plant and the number of bolls per 100 gm. of stems and leaves and caused some increase in vegetative development. 3. The fruiting branches of the cotton plant are in some respects homologous to the inflorescences of other plants-that is, under certain conditions cotton can develop either vegetative or fruiting branches to the exclusion of the other type. Only the fruiting branches produce flowers. Various synthetic-hormone sprays used on various types of cotton and under various conditions did not materially alter the kind or proportions of branches developed. 4. The foregoing data provide little basis for believing that the late-season setting of cotton bolls can be increased by the use of the type of growth-regulating materials employed or for believing that these materials can alter materially the proportions of fruiting and vegetative branches. A florigen type of growth substance might, however, have marked effects. Also, the anti-auxin type of material remains to be studied.
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Claims 9
Claim · model-written summary
Dusting cotton with sodium 4-chlorophenoxyacetate did not affect boll retention in 1947 or 1948.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- 100 p.p.m. of sodium 4-chlorophenoxyacetatee0
- Outcome
- boll retentione0
- Direction
- without effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dusting cotton plants during periods of active shedding with 100 p.p.m. of sodium 4-chlorophenoxyacetate and 1000 p.p.m. of naphthaleneacetic acid was without effect on boll retention in both 1947 and 1948”
Claim · model-written summary
Dusting cotton with naphthaleneacetic acid did not affect boll retention in 1947 or 1948.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1000 p.p.m. of naphthaleneacetic acide0
- Outcome
- boll retentione0
- Direction
- without effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dusting cotton plants during periods of active shedding with 100 p.p.m. of sodium 4-chlorophenoxyacetate and 1000 p.p.m. of naphthaleneacetic acid was without effect on boll retention in both 1947 and 1948”
Claim · model-written summary
Weekly sodium 4-chlorophenoxyacetate sprays significantly reduced bolls per plant.
- Treatment
- 20-p.p.m. solution of sodium 4-chlorophenoxyacetatee0
- Outcome
- number of bolls per plante0
- Direction
- reducede0
Not reportedTaxonComparator
Verbatim
e0“Spraying plants weekly with a 20-p.p.m. solution of sodium 4-chlorophenoxyacetate, in an experiment where naphthaleneacetate and napthoxyacetate were without effect, significantly reduced the number of bolls per plant and the number of bolls per 100 gm. of stems and leaves and caused some increase in vegetative development.”
Claim · model-written summary
Weekly sodium 4-chlorophenoxyacetate sprays significantly reduced bolls per stem and leaf mass.
- Treatment
- 20-p.p.m. solution of sodium 4-chlorophenoxyacetatee0
- Outcome
- number of bolls per 100 gm. of stems and leavese0
- Direction
- reducede0
Not reportedTaxonComparator
Verbatim
e0“Spraying plants weekly with a 20-p.p.m. solution of sodium 4-chlorophenoxyacetate, in an experiment where naphthaleneacetate and napthoxyacetate were without effect, significantly reduced the number of bolls per plant and the number of bolls per 100 gm. of stems and leaves and caused some increase in vegetative development.”
Claim · model-written summary
Weekly sodium 4-chlorophenoxyacetate sprays increased vegetative development somewhat.
- Treatment
- 20-p.p.m. solution of sodium 4-chlorophenoxyacetatee0
- Outcome
- vegetative developmente0
- Direction
- increasee0
Not reportedTaxonComparator
Verbatim
e0“Spraying plants weekly with a 20-p.p.m. solution of sodium 4-chlorophenoxyacetate, in an experiment where naphthaleneacetate and napthoxyacetate were without effect, significantly reduced the number of bolls per plant and the number of bolls per 100 gm. of stems and leaves and caused some increase in vegetative development.”
Claim · model-written summary
Naphthaleneacetate had no effect in the spray experiment.
Not reportedTaxonComparator
Verbatim
e0“naphthaleneacetate and napthoxyacetate were without effect”
Claim · model-written summary
Napthoxyacetate had no effect in the spray experiment.
Not reportedTaxonComparator
Verbatim
e0“naphthaleneacetate and napthoxyacetate were without effect”
Claim · model-written summary
Synthetic hormone sprays did not materially alter cotton branch types or proportions.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Various synthetic-hormone sprayse0
- Outcome
- kind or proportions of branches developede0
- Direction
- did not materially altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Various synthetic-hormone sprays used on various types of cotton and under various conditions did not materially alter the kind or proportions of branches developed.”
Claim · model-written summary
The authors found little basis for using the tested growth regulators to increase late-season cotton boll set.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- late-season setting of cotton bollse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“provide little basis for believing that the late-season setting of cotton bolls can be increased by the use of the type of growth-regulating materials employed”
The same questions in other papers
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- negative
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See all 115 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.