Effects of Ethephon and Gibberellic Acid on Thinning Peaches1

Young, E. F.; Edgerton, L. J.

doi:10.21273/hortsci.14.6.713

Cited by 2 publications

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References 5 publications

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“…Severe reductions in fruit size on poorly thinned trees will occur in ex tremely dry seasons. Numerous materials have been used for chemical thinning of peaches but none have provided consist ent, acceptable results on all cultivars (2,4,5,6,7,8,9,10). Byers (3) found that the thinning response with CGA 15281 varied with cultivar, timing, concentra tion, and year.…”

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Thinning ‘Loring’ Peaches with CGA 15281

Dozier

Carlton

Short

et al. 1981

horts

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Adequate fruit thinning of ‘Loring’ peach [Prunus persia (L.) Batsch] was achieved with single applications of (2-chloroethyl)-methylbis (phenylmethoxy) silane (CGA 15281) at concentrations of 240, 360, and 480 ppm applied at seed length of 8.8 mm and 2 applications at 240 and 360 ppm applied 7 days apart at 8.8 and 10.8 mm seed lengths in 1978. Additional hand thinning following treatment was required. In 1979 adequate thinning was achieved with 1 application of 240 ppm applied at seed length of 13.9 mm or 480 ppm applied at an 8.5-mm seed length. Yields from these treatments were reduced but did not differ from the control treatment. Multiple applications and higher rates resulted in over-thinning and reduced yields. The sensitivity of fruit to thinning appeared to increase with increased seed length. In 1978, foliage injury occurred at all rates and the severity of injury increased at higher concentrations and multiple applications. However, no foliage injury was observed in 1979.

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confidence: 99%