Abstract
In a three year field study, the effects of the plant growth regulant (2-chloroethyl)phosphonic acid (ethephon) were observed on transplanted and direct-seeded tomato plants of the Roma and Napoli cultivars in the Richmond, Mudgee, Wellington, and Narromine tomato growing areas of New South Wales. Ethephon increased the percentage yield of usable fruit from a single harvest when applied at a concentration of 300-1 000 mg l-1 to crops containg 0-38 per cent usable fruit. The optimum yield of Napoli fruit was obtained when ethephon was applied to a crop containing about 30 per cent usable fruit and the harvest made some 15-20 days later. The compound 2-(4-chlorophenylthio) ethyldiethylammonium chloride (CPTA), which induces the synthesis of lycopene in many plant tissues, did not increase the rate of accumulation of usable fruit when compared with untreated crop. When used in a combination treatment with ethephon, CPTA did not increase usable fruit accumulation compared with ethephon treatment.
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Claims 4
Claim · model-written summary
Ethephon increased single-harvest usable fruit yield.
- Taxon
- tomatoes
Solanum lycopersicumt0 - Treatment
- Ethephone0
- Outcome
- percentage yield of usable fruit from a single harveste0
- Direction
- increasede0
- Qualifier
- 300-1 000 mg l-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon increased the percentage yield of usable fruit from a single harvest when applied at a concentration of 300-1 000 mg l-1 to crops containg 0-38 per cent usable fruit”
t0“tomatoes”
Claim · model-written summary
Napoli optimum yield occurred with ethephon at about 30% usable fruit and harvest 15–20 days later.
- Taxon
- tomatoesSolanum lycopersicumt0
- Material
- Napolie0
- Treatment
- ethephone0
- Outcome
- optimum yielde0
- Qualifier
- about 30 per cent usable fruit and the harvest made some 15-20 days latere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum yield of Napoli fruit was obtained when ethephon was applied to a crop containing about 30 per cent usable fruit and the harvest made some 15-20 days later”
t0“tomatoes”
Claim · model-written summary
CPTA did not increase usable fruit accumulation versus untreated crop.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- CPTAe0
- Outcome
- rate of accumulation of usable fruite0
- Direction
- did not increasee0
- Comparator
- untreated crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CPTA), which induces the synthesis of lycopene in many plant tissues, did not increase the rate of accumulation of usable fruit when compared with untreated crop”
t0“tomatoes”
Claim · model-written summary
CPTA plus ethephon did not improve usable fruit accumulation over ethephon alone.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- combination treatment with ethephon, CPTAe0
- Outcome
- usable fruit accumulatione0
- Direction
- did not increasee0
- Comparator
- ethephon treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When used in a combination treatment with ethephon, CPTA did not increase usable fruit accumulation compared with ethephon treatment”
t0“tomatoes”
The same questions in other papers
(2-chloroethyl)phosphonic acid · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 2 reporting no difference from an alternative
- 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.