Abstract
Abstract A technique is proposed for reducing the number of overwintering pink bollworms [ Pectinophora gossypiella (Saunders)] by reducing their food supply late in the year. This is done by using growth regulators that prevent formation of new cotton ( Gossypium sp.) bolls late in the season, but do not affect development of existing bolls or vegetation. Since most of the late‐season bolls do not mature, the effect on lint yield would be minimal. Three chemicals, (2‐chloroethyl) trimethyl ammonium chloride, (CCC); dimethylamine salt of (2,4‐dichlorophenoxy) acetic acid, (2,4‐D); and 2‐chloroethylphosphonic acid (Ethephon) were used. They were sprayed on cotton late in August and early in September. Each of the chemicals reduced the number of green bolls remaining after harvest by more than 90% at one or more dates in one or more tests. In most cases, lint yields were also reduced. In limited observations, we obtained 87 to 96% reduction in diapausing pink bollworm larvae from these treatments. The effects of Ethephon on seed and fiber quality were too severe to warrant its further use. Residue of 2,4‐D in seeds reduced germination. CCC reduced fiber strength in two of four tests. Further testing of the last two chemicals and evaluation of other chemicals are warranted.
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Claims 6
Claim · model-written summary
Each of three chemicals reduced green bolls after harvest by more than 90% in at least one test.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- Each of the chemicalse0
- Outcome
- number of green bolls remaining after harveste0
- Direction
- reducede0
- Value
- more than 90%e0
- Qualifier
- at one or more dates in one or more testse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each of the chemicals reduced the number of green bolls remaining after harvest by more than 90% at one or more dates in one or more tests.”
t0“Cotton”
t1“Cotton”
Claim · model-written summary
Lint yields were reduced in most cases.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Growth Regulatorst0
- Outcome
- lint yieldse0
- Direction
- reducede0
- Qualifier
- In most casese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In most cases, lint yields were also reduced.”
t0“Cotton Fruiting with Growth Regulators”
t1“Cotton Fruiting with Growth Regulators”
Claim · model-written summary
The treatments reduced diapausing pink bollworm larvae by 87 to 96% in limited observations.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- these treatmentse0
- Interactor
- pink bollworm
Pectinophora gossypiellae0pest - Outcome
- diapausing pink bollworm larvaee0
- Direction
- reductione0
- Value
- 87 to 96%e0
- Qualifier
- In limited observationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In limited observations, we obtained 87 to 96% reduction in diapausing pink bollworm larvae from these treatments.”
t0“Cotton”
t1“Cotton”
Claim · model-written summary
Ethephon had severe adverse effects on seed and fiber quality.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Ethephone0
- Outcome
- seed and fiber qualitye0
- Qualifier
- too severe to warrant its further usee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of Ethephon on seed and fiber quality were too severe to warrant its further use.”
t0“Cotton”
t1“Cotton”
Claim · model-written summary
2,4-D residue in seeds reduced germination.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- seedse0
- Treatment
- Residue of 2,4‐De0
- Outcome
- germinatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Residue of 2,4‐D in seeds reduced germination.”
t0“Cotton”
t1“Cotton”
Claim · model-written summary
CCC reduced fiber strength in two of four tests.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- CCCe0
- Outcome
- fiber strengthe0
- Direction
- reducede0
- Qualifier
- in two of four testse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CCC reduced fiber strength in two of four tests.”
t0“Cotton”
t1“Cotton”
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