Abstract
The effects of hydrogen cyanamide (H 2 CN 2 ) on budbreak and phytotoxicity of l-year-old potted peach trees [Prunus persica (L.) Batsch. cv. Redhaven] over a wide range of concentrations at several stages of dormancy were studied. Endodormancy (180° GS; degree growth stage) began on 1 Oct. Maximum intensity of endodormancy (270° GS) was reached after the plants were exposed to 320 chill units on 1 Nov., and 50% of the buds were broken at 860 chill units on 1 Dec. Five concentrations of H 2 C N 2 (0, 0.125, 0.25, 0.5, and 1.0 m ) were applied on 1 and 15 Oct., 1 and 15 Nov., and 1 and 15 Dec. 1990. All concentrations promoted budbreak; however, percent budbreak and phytotoxicity depended on concentration and timing of application. The most effective concentration (greatest budbreak and lowest phytotoxicity) was 0.125 m H 2 CN 2 on all treatment dates. Phytotoxicity was evident at all application dates but was greatest at the highest concentrations. Plants were most resistant to H 2 CN 2 at maximum intensity of endodormancy. Hydrogen cyanamide-induced budbreak was highest during the later stages of endodormancy (295 to 315° GS). Treatments applied during the ecodormancy stage (340° GS) inhibited and delayed budbreak and damaged buds and stems. Chemical name used: hydrogen cyanamide (H 2 CN 2 , Dormex).
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Claims 12
Claim · model-written summary
Endodormancy began on 1 October at 180° GS.
- Taxon
- Peach
Prunus persicat0 - Outcome
- Endodormancye0
- Value
- 180° GSe0
- Qualifier
- 1 Oct.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Endodormancy (180° GS; degree growth stage) began on 1 Oct.”
t0“Peach”
Claim · model-written summary
Maximum endodormancy intensity was reached at 270° GS after 320 chill units on 1 November.
- Taxon
- PeachPrunus persicat0
- Outcome
- intensity of endodormancye0
- Direction
- Maximume0
- Value
- 270° GSe0
- Qualifier
- 320 chill units on 1 Nov.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum intensity of endodormancy (270° GS) was reached after the plants were exposed to 320 chill units on 1 Nov.”
t0“Peach”
Claim · model-written summary
Half the buds had broken at 860 chill units on 1 December.
- Taxon
- PeachPrunus persicat0
- Outcome
- buds were brokene0
- Value
- 50%e0
- Qualifier
- 860 chill units on 1 Dec.e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“50% of the buds were broken at 860 chill units on 1 Dec.”
t0“Peach”
Claim · model-written summary
All tested concentrations promoted budbreak.
- Taxon
- PeachPrunus persicat1
- Treatment
- Hydrogen Cyanamidet0
- Outcome
- budbreake0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All concentrations promoted budbreak; however, percent budbreak and phytotoxicity depended on concentration and timing of application.”
t0“Hydrogen Cyanamide”
t1“Peach”
Claim · model-written summary
Budbreak percentage and phytotoxicity depended on concentration and application timing.
- Taxon
- PeachPrunus persicat0
- Treatment
- concentration and timing of applicatione0
- Outcome
- percent budbreak and phytotoxicitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percent budbreak and phytotoxicity depended on concentration and timing of application.”
t0“Peach”
Claim · model-written summary
The 0.125 m treatment gave greatest budbreak on every treatment date.
- Taxon
- PeachPrunus persicat0
- Treatment
- 0.125 m H 2 CN 2e0
- Outcome
- budbreake0
- Direction
- greateste0
- Qualifier
- on all treatment datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective concentration (greatest budbreak and lowest phytotoxicity) was 0.125 m H 2 CN 2 on all treatment dates.”
t0“Peach”
Claim · model-written summary
The 0.125 m treatment gave lowest phytotoxicity on every treatment date.
- Taxon
- PeachPrunus persicat0
- Treatment
- 0.125 m H 2 CN 2e0
- Outcome
- phytotoxicitye0
- Direction
- loweste0
- Qualifier
- on all treatment datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective concentration (greatest budbreak and lowest phytotoxicity) was 0.125 m H 2 CN 2 on all treatment dates.”
t0“Peach”
Claim · model-written summary
Phytotoxicity occurred at every application date and was greatest at the highest concentrations.
- Taxon
- PeachPrunus persicat0
- Treatment
- highest concentrationse0
- Outcome
- Phytotoxicitye0
- Direction
- greateste0
- Qualifier
- evident at all application datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytotoxicity was evident at all application dates but was greatest at the highest concentrations.”
t0“Peach”
Claim · model-written summary
Plants were most resistant to hydrogen cyanamide at maximum endodormancy intensity.
- Taxon
- PeachPrunus persicat0
- Outcome
- resistant to H 2 CN 2e0
- Direction
- moste0
- Qualifier
- at maximum intensity of endodormancye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants were most resistant to H 2 CN 2 at maximum intensity of endodormancy.”
t0“Peach”
Claim · model-written summary
Induced budbreak was highest during later endodormancy at 295 to 315° GS.
- Taxon
- PeachPrunus persicat0
- Treatment
- Hydrogen cyanamidee0
- Outcome
- budbreake0
- Direction
- higheste0
- Value
- 295 to 315° GSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hydrogen cyanamide-induced budbreak was highest during the later stages of endodormancy (295 to 315° GS).”
t0“Peach”
Claim · model-written summary
Ecodormancy applications inhibited and delayed budbreak.
- Taxon
- PeachPrunus persicat0
- Treatment
- Treatments applied during the ecodormancy stagee0
- Outcome
- budbreake0
- Direction
- inhibited and delayede0
- Qualifier
- 340° GSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments applied during the ecodormancy stage (340° GS) inhibited and delayed budbreak and damaged buds and stems.”
t0“Peach”
Claim · model-written summary
Ecodormancy applications damaged buds and stems.
- Taxon
- PeachPrunus persicat0
- Treatment
- Treatments applied during the ecodormancy stagee0
- Outcome
- damaged buds and stemse0
- Qualifier
- 340° GSe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments applied during the ecodormancy stage (340° GS) inhibited and delayed budbreak and damaged buds and stems.”
t0“Peach”
The same questions in other papers
cyanamide · phenology · Prunus persica (peach)Results agree
5 papers in the same direction as this paper
- positive
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2 papers more in this group
See all 6 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.