Results of Eight Years with CGA-15281 as a Postbloom Thinner for Peaches

Gambrell, C. E.; Coston, D. C.; Sims, E. T.

doi:10.21273/jashs.108.4.605

Cited by 9 publications

(3 citation statements)

References 7 publications

(8 reference statements)

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“…These compounds are used to elicit ethylenemediated responses such as fruit loosening, fruit and leaf abscission, shuck dehiscence, fruit ripening, and stimulation of latex flow (1). It has become apparent from field tests that induction of specific responses may be better achieved with one or the other compound (12,20,23,28). For example, (2-chloroethyl)phosphonic acid, which is presently used on 15 horticultural crops in the United States, has not proven to be an acceptable thinning agent of peach fruits [Prunus persica (L.) Batsch].…”

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confidence: 99%

“…The ethylene-releasing compound (2-chloroethyl)methyl-bis(phenylmethoxy)silane, however, has been effective for peach thinning in some geographical areas. Acceptable levels of fruit removal can be achieved with negligible leaf abscission or other undesirable effects (12,19). While the mode of action (i.e., ethylene release) is identical between the two compounds, differences in efficacy for specific physiological responses may be largely dependent on the kinetics of ethylene release and other chemical characteristics of the respective compounds (20,21).…”

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Effects of Physical and Environmental Factors on the Release Kinetics of Ethylene from (2-Chloroethyl)phosphonic Acid and (2-Chloroethyl)-methylbis(phenylmethoxy)silane

Beaudry

Kays

1987

J. Amer. Soc. Hort. Sci.

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Several environmental and physical factors affect the kinetics of ethylene release from (2-chloroethyDphosphonic acid and (2-chloroethyl)methylbis(phenylmethoxy)silane. Target surface chemistry exerted a strong influence on the evolution of ethylene from both compounds. Ethylene release from (2-chloroethyl)methylbis(phenylmethoxy) silane was slowed by glass and hydrophobic substances such as wax, surfactants in the spray solution, and high concentrations of the parent molecule, but not by epicuticular waxes on leaves. Ethylene evolution from (2-chloroethyl)phosphonic acid was inhibited by glass and high levels of epicuticular waxes. The rate of ethylene release from both compounds was positively correlated with temperature; however, ethylene released from (2-chloroethyl)methylbis(phenylmethoxy)silane was much less affected by temperature increases. Increases in light intensity promoted the initial release of ethylene from (2-chloroethyl)methylbis(phenylmethoxy)silane, but decreased long-term yield. Light intensity had no effect on the breakdown of (2-chloroethyl)phosphonic acid.

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confidence: 99%

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confidence: 99%

Effects of Physical and Environmental Factors on the Release Kinetics of Ethylene from (2-Chloroethyl)phosphonic Acid and (2-Chloroethyl)-methylbis(phenylmethoxy)silane

Beaudry

Kays

1987

J. Amer. Soc. Hort. Sci.

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“…Thus, the differences in stem tissue respiration de tected in this study may be related to differ ences in carbohydrate metabolism, which may directly or indirectly influence suscepti bility to cold injury. 4,5). Although (2-chloroethyl)phosphonic acid (ethephon), an ethylene-generating ma terial, has considerable blossom-thinning ef fect (2,7,8), the successful use of CGA as a blossom thinner has not been reported.…”

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Peach Blossom Thinning with CGA 152811

Krewer

Daniell

Couvillon

1982

horts

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There was an inverse linear relationship between fruit set of ‘Bicentennial’ and ‘Redhaven’ peach trees [Prunus persica (L.) Batsch] and treatments of 0 − 4000 ppm of (2-chloroethyl)methylbis(phenylmethoxy) silane (CGA 15281) in 1980. Increases in fruit weight occurred at the highest rate of CGA 15281 when compared to lower rates with ‘Bicentennial’, but no significant increase was obtained with ‘Redhaven’. Terminal fruit were larger than basal and middle node position fruits in ‘Bicentennial’. In 1981, all applications of CGA 15281 (0 − 3000 ppm) to ‘Candor’ and ‘Jefferson’ thinned blossoms and resulted in an increase in fruit size, when compared to the hand-thinned control. Treatments of 2250, 2500, and 2750 ppm to ‘Candor’ resulted in adequate thinning and increased yields. Applications at 1500 and 1750 ppm resulted in overthinning and reduced yields in ‘Jefferson’.

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Ethephon Enhancement of Secondary Metabolite Synthesis in Plant Cell Cultures

Cho¹,

Kim

Pedersen³

et al. 1988

Biotechnology Progress

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Addition of an ethylene precursor, ethephon, was studied in plant-cell-suspension cultures ofCoffea arabica and Thalictrum rugosum as an enhancer of secondary metabolite production. In both cases the compound was able to stimulate alkaloid production, even though the biochemical pathways are widely different. This suggests that ethephon, or more directly ethylene, may be valuable in increasing secondary metabolite levels in a variety of cellsuspension culture systems.

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Results of Eight Years with CGA-15281 as a Postbloom Thinner for Peaches

Cited by 9 publications

References 7 publications

Effects of Physical and Environmental Factors on the Release Kinetics of Ethylene from (2-Chloroethyl)phosphonic Acid and (2-Chloroethyl)-methylbis(phenylmethoxy)silane

Effects of Physical and Environmental Factors on the Release Kinetics of Ethylene from (2-Chloroethyl)phosphonic Acid and (2-Chloroethyl)-methylbis(phenylmethoxy)silane

Peach Blossom Thinning with CGA 152811

Ethephon Enhancement of Secondary Metabolite Synthesis in Plant Cell Cultures

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