Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

Awad, Ayman A.; Sato, Daisuke; Kusumoto, Dai; Kamioka, Hiroaki; Takeuchi, Yoshinori; Yoneyama, Koichi

doi:10.1007/s10725-006-0009-3

Cited by 23 publications

(12 citation statements)

References 45 publications

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“…Consequently, it was observed AVG treatments delayed harvest time by 3 days. It was reported in many studies done with pears and apples that AVG applications delay harvest time showing similarities with our findings (Clayton et al 2000;Schupp & Greene 2004;Greene 2006;Petri et al 2006;Rath et al 2006;WookJae et al 2006;Kang et al 2007;Whale et al 2008). Phan-Thien et al (2004) showed the effect of 125 mg L -1 of AVG sprayed onto 'Gala' and 'Pink Lady' apples in the first 5 to 12 days delayed ripening by 5 to 7 days.…”

Section: Fruit Maturity and Harvestsupporting

confidence: 91%

Pre-harvest Application of ReTain (Aminoethoxyvinylglycine, AVG) Influences Pre-harvest Drop and Fruit Quality of ‘Williams’ Pears

Batur

Çetinbaş

2017

Tarım Bilimleri Dergisi

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Williams' is the highly quality pear cultivar mostly produced in the Eğirdir region of Turkey. ReTain (15% aminoethoxyvinilglycine, AVG) is a plant growth regulator used to control pre-harvest drop and increase fruit weight and firmness. The objective of this study was to determine the responses of AVG treatments on the preharvest drop and fruit quality of 'Williams' pear. Pear trees of the cultivar 'Williams' were sprayed 30, 21 and 7 days before commercial harvest (DBH) with AVG, at doses of 100, 125 and 150 mg L-1 , and assessed for pre-harvest drop, yield, maturity, delay in harvest, fruit quality, ethylene production and respiration rate at the harvest time. Fruit samples were analyzed for fruit quality parameters which are: fruit width, fruit weight, soluble solids content (SSC), titratable acidity (TA), fruit firmness, fruit colour, fruit macro and micro elements content. Maturation of the 30 and 21 DBH AVG-treated fruits were delayed 3-4 days compared to the 7 DBH AVG-treated and control groups. The pre-harvest drop decreased with all AVG applications by approximately 38-100% in comparison with the control group fruits. AVG treatments increased fruit size (7-10%), fruit weight (26-41%) and fruit firmness (2-16%) of 'Williams' pear. AVG application reduce ethylene production and respiration rate and it was found that the applications enhance the ethylene production and respiration rate by approximately (100%) compared to the control fruits on the harvest date. Results of this study indicated that 30 DBH and 21 DBH AVG-treatments at 100 mg L-1 can be recommended for 'Williams' pear cultivar on both pre-harvest fruit drop, as well as in harvest date and fruit quality.

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Section: Fruit Maturity and Harvestsupporting

confidence: 91%

Pre-harvest Application of ReTain (Aminoethoxyvinylglycine, AVG) Influences Pre-harvest Drop and Fruit Quality of ‘Williams’ Pears

Batur

Çetinbaş

2017

Tarım Bilimleri Dergisi

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“…ReTain Ò has subsequently proven useful as a horticultural tool for managing crop-load or fruit ripening in certain walnut (Juglans regia L. cv. Serr) (Anderson et al, 2006;Beede and Polito, 2003;Buchner et al, 2006) and tree-fruit cultivars (Belding and Lokaj, 2002;Bregoli et al, 2002;Byers, 1997Byers, , 1998aByers, , 1998bClayton et al, 2000;Dal-Cin et al, 2008;Greene, 2002Greene, , 2005Greene, , 2006Greene and Schupp, 2004;Hayama et al, 2008;Hu et al, 2002;Rath et al, 2006;Salazar-García et al, 2006;Schupp and Greene, 2004;Shafer et al, 1997;Webster et al, 2006;Williams, 1980). ReTain's Ò success with other tree crops indicates potential for managing crop-load in pecan.…”

mentioning

confidence: 99%

Influence of Aminoethoxyvinylglycine on Pecan Fruit Retention

Wood¹,

Lombardini²,

Heerema³

2009

horts

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Insufficient fruit retention limits profitability of certain pecan [Carya illinoinensis (Wangenh.) K. Koch] cultivars. The present study examined efficacy of aminoethoxyvinylglycine (formulated as ReTain®; Valent BioSciences, Libertyville, IL), a natural ethylene inhibitor, for increasing crop-load through increased fruit retention in pecan trees grown at three distinct locations within the U.S. pecan belt. Several years of field studies found that timely postpollination ReTain® sprays [132 mg·L−1 a.i. (11.7 oz./acre)] to canopies could increase fruit retention of ‘Desirable’ and increase crop yield by 16% to 38% in trees carrying a “moderate to heavy” crop. ReTain® did not detectably increase fruit retention on trees carrying a “light” crop-load. The ReTain®-associated increase in yield of “heavy” crop-load trees did not necessarily decrease subsequent year yield. ReTain® appears to offer commercial potential as a crop-load management tool for ‘Desirable’ through regulation of Stage II drop (i.e., June-drop), but may not be efficacious for all cultivars.

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“…The ability of AVG, as ReTain, to enhance pecan fruit retention is consistent with similar effects on certain walnut (Juglans regia L. cv. Serr) cultivars (Anderson et al, 2006;Beede and Polito, 2003;Buchner et al, 2006) and certain other tree or vine fruit crops (Belding and Lokaj, 2002;Bregoli et al, 2002;Byers, 1997Byers, , 1998aByers, , 1998bClayton et al, 2000;Dal-Cin et al, 2008;Greene, 2002Greene, , 2005Greene, , 2006Greene and Schupp, 2004;Hayama et al, 2008;Hu et al, 2002;Rath et al, 2006;Salazar-Garciìa et al, 2006;Schupp and Greene, 2004;Shafer et al, 1997;Webster et al, 2006;Williams, 1980). The product may therefore exhibit potential as a horticultural tool for crop load management in pecan (Wood et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Influence of Aminoethoxyvinylglycine (AVG) on Yield and Quality of Nut Crops from a Commercial Pecan Orchard

Wood¹

2011

horts

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Excessive fruit drop (i.e., June drop) can limit orchard profitability of certain pecan [Carya illinoinensis (Wangenh.) K. Koch] cultivars. The present study examines efficacy of aminoethoxyvinylglycine (AVG; formulated as ReTain®; Valent BioSciences, Libertyville, IL), a natural ethylene inhibitor, for increasing nutmeat yield in a commercial ‘Desirable’ pecan orchard over a 2-year period. The 30-ha experiment consisted of two treatments (nontreated versus ReTain) in the first year, an “off” year in the orchard's alternate bearing cycle. The second year's study, an “on” year, consisted of four treatments (i.e., “08 nontreated + 09 nontreated,” “08ReTain + 09 nontreated,” “08 nontreated + 09 ReTain,” and “08ReTain + 09 ReTain”). AVG, as ReTain [132 mg·L−1 a.i. (11.7 oz/acre)], was applied as two post-pollination canopy sprays (937 L·ha−1) 2 weeks apart in both years. During the “off” year, ReTain increased nut yield parameters with ReTain increasing kernel yield by 36% (704 kg·ha−1 versus 516 kg·ha−1) over that of nontreated trees. In the subsequent “on” crop year, the trees exhibiting a ReTain-associated previous year yield increase of ≈36% exhibited a reduction in yield of ≈25%, thus largely negating the previous season's yield increase over a 2-year alternate bearing cycle. Additionally, ReTain-treated trees during the “on” year failed to exhibit an increase in yield parameters over that of the nontreated control. As a result of a lag effect on subsequent year yield parameters, ReTain offers potential as a crop-load management tool for ‘Desirable’ orchards in “off” years such as a year of relatively high nutmeat price followed by a year of relatively low price. There appears to be no positive effect on yield when used in a heavy crop-load “on” year of an alternate bearing cycle. Thus, ReTain might have benefit for stabilizing alternate bearing in ‘Desirable’ pecan orchards. Kernel quality (defined as percentage of nut weight as kernel) of individual nuts from “on” year trees was not as sensitive to units of yield increase as for individual nuts of “off” year trees, thus implying that the rate of assimilate partitioning to individual reproductive structures in “off”-year trees is not as great as that in “on”-year trees.

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Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

Cited by 23 publications

References 45 publications

Pre-harvest Application of ReTain (Aminoethoxyvinylglycine, AVG) Influences Pre-harvest Drop and Fruit Quality of ‘Williams’ Pears

Pre-harvest Application of ReTain (Aminoethoxyvinylglycine, AVG) Influences Pre-harvest Drop and Fruit Quality of ‘Williams’ Pears

Influence of Aminoethoxyvinylglycine on Pecan Fruit Retention

Influence of Aminoethoxyvinylglycine (AVG) on Yield and Quality of Nut Crops from a Commercial Pecan Orchard

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