Abstract
Abstract Recommended rates of (2-chloroethyl)phosphonic acid (ethephon) application did not prevent staminate flower formation on summer squash ( Cucurbita pepo L.) sufficient to permit hybrid seed production without defloration. The field experiments were conducted in commercial fields in which flower development occurred during warm long day conditions, which promote maleness in squash. A strongly female ‘Cocozelle’ inbred, a strongly male ‘Straightneck’ inbred and a very strongly male ‘Crookneck’ inbred were treated at several seedling stages with rates up to 600 ppm ethephon. Two applications of 400 to 600 ppm ethephon resulted in development of the fewest staminate flowers without significantly reducing seed yield or quality. The ‘Crookneck’ inbred was least responsive to ethephon.
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Claims 4
Claim · model-written summary
Recommended ethephon rates did not prevent enough staminate flowers to avoid defloration in hybrid seed production.
- Taxon
- summer squashe0
- Treatment
- Recommended rates of (2-chloroethyl)phosphonic acid (ethephon) applicatione0
- Outcome
- staminate flower formatione0
- Direction
- did not prevente0
Not reportedComparator
Verbatim
e0“Recommended rates of (2-chloroethyl)phosphonic acid (ethephon) application did not prevent staminate flower formation on summer squash ( Cucurbita pepo L.) sufficient to permit hybrid seed production without defloration.”
Claim · model-written summary
Two applications of 400 to 600 ppm ethephon produced the fewest staminate flowers.
- Taxon
- summer squasht0
- Treatment
- Two applications of 400 to 600 ppm ethephone0
- Outcome
- staminate flowerse0
- Direction
- feweste0
Not reportedComparator
Verbatim
e0“Two applications of 400 to 600 ppm ethephon resulted in development of the fewest staminate flowers without significantly reducing seed yield or quality.”
t0“Summer Squash”
Claim · model-written summary
Two applications of 400 to 600 ppm ethephon did not significantly reduce seed yield or quality.
- Taxon
- summer squasht0
- Treatment
- Two applications of 400 to 600 ppm ethephone0
- Outcome
- seed yield or qualitye0
- Direction
- without significantly reducinge0
Not reportedComparator
Verbatim
e0“Two applications of 400 to 600 ppm ethephon resulted in development of the fewest staminate flowers without significantly reducing seed yield or quality.”
t0“Summer Squash”
Claim · model-written summary
The Crookneck inbred was least responsive to ethephon.
Verbatim
e0“The ‘Crookneck’ inbred was least responsive to ethephon.”
t0“Summer Squash”
The same questions in other papers
(2-chloroethyl)phosphonic acid · phenology · Cucurbita (pumpkins)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.