Abstract
Abstract (2-Chloroethyl)phosphonic acid (ethephon) was applied to Red Kidney beans ( Phaseolus vulgaris L. cv. California Light Red) at rates of 0.14 to 0.56 kg/ha to determine its effectiveness in defoliating the plants and conditioning them for harvest, without a reduction in yield. Ethephon (0.14 kg/ha) reduced yield of beans 25% when applied 18 days before the normal harvest date, but when applied 7 days before the normal harvest date no yield reduction occurred even at high rates; and low rates produced 90% defoliation. When temperatures were 10°C or below, poor defoliation occurred even at high rates of ethephon. Surfactants with ethephon did not affect defoliation or yield.
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Claims 6
Claim · model-written summary
Ethephon at 0.14 kg/ha reduced bean yield 25% when applied 18 days before normal harvest.
- Taxon
- Red Kidney Beanst0
- Treatment
- Ethephon (0.14 kg/ha)e0
- Outcome
- yield of beanse0
- Direction
- reducede0
- Value
- 25%e0
- Qualifier
- 18 days before the normal harvest datee0
Not reportedComparator
Verbatim
e0“Ethephon (0.14 kg/ha) reduced yield of beans 25% when applied 18 days before the normal harvest date”
t0“Red Kidney Beans”
Claim · model-written summary
Ethephon applied seven days before normal harvest did not reduce bean yield even at high rates.
- Taxon
- Red Kidney Beanst0
- Treatment
- high ratese0
- Outcome
- yield reductione0
- Direction
- no yield reductione0
- Qualifier
- 7 days before the normal harvest datee0
Not reportedComparator
Verbatim
e0“when applied 7 days before the normal harvest date no yield reduction occurred even at high rates”
t0“Red Kidney Beans”
Claim · model-written summary
Low ethephon rates produced 90% defoliation seven days before normal harvest.
- Taxon
- Red Kidney Beanst0
- Treatment
- low ratese0
- Outcome
- defoliatione0
- Value
- 90%e0
- Qualifier
- 7 days before the normal harvest datee0
Not reportedComparatorDirection
Verbatim
e0“when applied 7 days before the normal harvest date no yield reduction occurred even at high rates; and low rates produced 90% defoliation”
t0“Red Kidney Beans”
Claim · model-written summary
At temperatures of 10°C or below, ethephon caused poor defoliation even at high rates.
- Taxon
- Red Kidney Beanst0
- Treatment
- ethephone0
- Outcome
- defoliatione0
- Direction
- poore0
- Qualifier
- temperatures were 10°C or belowe0
Not reportedComparator
Verbatim
e0“When temperatures were 10°C or below, poor defoliation occurred even at high rates of ethephon”
t0“Red Kidney Beans”
Claim · model-written summary
Surfactants added to ethephon did not affect defoliation.
- Taxon
- Red Kidney Beanst0
- Treatment
- Surfactants with ethephone0
- Outcome
- defoliatione0
- Direction
- did not affecte0
Not reportedComparator
Verbatim
e0“Surfactants with ethephon did not affect defoliation or yield”
t0“Red Kidney Beans”
Claim · model-written summary
Surfactants added to ethephon did not affect yield.
Not reportedComparator
Verbatim
e0“Surfactants with ethephon did not affect defoliation or yield”
t0“Red Kidney Beans”
The same questions in other papers
(2-chloroethyl)phosphonic acid · yield · Phaseolus vulgaris (common bean)Results differ
2 papers in the same direction as this paper · 5 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 papers →(2-chloroethyl)phosphonic acid · pest · Phaseolus vulgaris (common bean)Positive and negative results
1 in the opposite direction
- positive
surfactant · pest · Phaseolus vulgaris (common bean)Positive and negative results
2 in the opposite direction
- positive
- 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.