Evaluation of Two Promising Peach Chemical Thinners in Chile

Lemus, G.

doi:10.17660/actahortic.1998.465.83

Cited by 3 publications

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“…Prebloom sprays, such as Gibberellins applied a couple of weeks before harvest (Southwick and Fritts, 1995;Taylor and Geisler-Taylor, 1998) and soybean oil applied during winter (Myers et al, 1996), have been shown to be effective; however, producers are reluctant to spray chemical thinners until the danger of spring frost has passed. Effi cacy of bloom sprays typically varies due to weather patterns and stage of bloom and some are not cost effective compared to hand thinning (Byers, 1999;Byers and Lyons, 1983;1984;Coetzee and Theron, 1999;Fallahi, 1997;Lemus, 1998;Southwick et al, 1996Southwick et al, , 1998. Mechanical approaches to thinning are typically conducted at full bloom or shortly after (Baugher et al, 1988(Baugher et al, , 1991Berlage, and Langmo, 1982) but have not been widely adopted by commercial producers.…”

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Tergitol TMN-6 for Thinning Peach Blossoms

Wilkins¹,

Ebel²,

Dozier³

et al. 2004

HortSci

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This study was conducted to determine efficacy of Tergitol TMN-6 in thinning peach blossoms. A pretest was conducted and demonstrated no difference between TMN-6 and TMN-10 in efficacy when applied at full bloom or petal fall and at rates of 20 and 40 mL·L-1. In the main test, Tergitol TMN-6 was sprayed once at 10, 20, or 30 mL·L-1 at full bloom or petal fall and compared to an unsprayed control for 3 years. Tergitol caused widespread necrosis of flower parts including sepals, petals, pistils, stamens and peduncles. There was a difference among chemical treatments with more fruit removed at higher concentrations, although the amount of fruit removed was similar for the 20 and 30 mL·L-1 rates. There was no difference in thinning response at full bloom or petal fall, indicating a wide window of efficacy. There was also a difference among years, which was apparently not related to temperature or relative humidity during time of application. Tergitol caused some leaf yellowing and tip burn especially at the higher rates when leaves were present, but the trees did not appear to be seriously affected. Fruit weight was either not affected or larger in some years from treatment. Unlike higher concentrations, tergitol at 10 mL·L-1 did not negatively impact fruit number per tree at harvest. At harvest, fruit weight, skin blush, firmness, and soluble solids at harvest were not affected by treatment. Tergitol TMN-6 proved to be an effective thinning agent and when applied from full bloom to petal fall at 10 mL·L-1 it did not adversely affect the tree or fruit.

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confidence: 99%

Tergitol TMN-6 for Thinning Peach Blossoms

Wilkins¹,

Ebel²,

Dozier³

et al. 2004

HortSci

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Fruit Thinning

Costa

Botton

Vizzotto

2018

Horticultural Reviews

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Evaluation of the effectiveness of Armothin for chemical peach thinning

Tsipouridis¹,

Thomidis²

2005

Aust. J. Exp. Agric.

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This study was designed to test Armothin as a candidate for chemical peach thinning. Fruit set on ‘Andross’ trees sprayed with 3% Armothin was lower than on those sprayed with 1.5% Armothin. Both 3 and 1.5% Armothin resulted in less fruit set than in the untreated control. The rootstock used did not influence the effectiveness of Armothin. However, when treated with 3% Armothin, the number and proportion of fruit set in the cultivar ‘Flavour Crest’ was much higher than that set in the cultivar ‘May Crest’. The highest percentage of fruit set per annual shoot ranged from 10 to 40% on ‘Katerina’ trees treated with 3% Armothin, whereas the range was 60–80% on the untreated control.

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Evaluation of Two Promising Peach Chemical Thinners in Chile

Cited by 3 publications

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Tergitol TMN-6 for Thinning Peach Blossoms

Tergitol TMN-6 for Thinning Peach Blossoms

Fruit Thinning

Evaluation of the effectiveness of Armothin for chemical peach thinning

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