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J.A. Cline

The effect of aminoethoxyvinylglycine (AVG), commercially available as ReTain, and three organo-silicone surfactants were evaluated in a series of four experiments over a 2-year period in two commercial peach orchards. Four rates of AVG (0, 66, 132, and 264 mg·L–1 AVG; all applied with 0.05% Sylgard 309) and three surfactants (0.05% Sylgard 309; 0.05% Regulaid; and 0.50% LI-700; all applied with 132 mg·L–1 AVG) were applied to `Venture' and `Babygold 7' peach trees 10 days before first harvest. Fruit were harvested according to commercial standard maturation criteria of background color, suture filling, and fruit size. Treatments were assessed in relation to fruit maturity, delay in harvest, fruit size and yield, fruit quality (flesh firmness and brix), as well as fruit quality following 2 weeks of cold storage. Based on sequential harvest data, the maturation of the AVG treated trees was delayed by about 3 to 4 days. Fruit from AVG treated trees were firmer at harvest and 2 weeks following cold storage at 2°C. However, no additional increase in fruit size or yield was detected. In addition, the addition of a surfactant was not necessary for AVG to be efficacious for delaying maturity and enhancing firmness when applied at 132 mg·L–1 AVG. However, when the three surfactants were compared, Regulaid and Li 700 advanced color development in one experiment and Li-700 resulted in firmer fruit in another. Aminoethoxyvinylglycine applications to the clingstone cultivars `Venture' and `Babygold 7' can be used successfully to manage harvest activities by delaying the onset of picking and improving fruit firmness.

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Richard L. Bell

al., 2008 ). The choice of parents for breeding must take into consideration the level of resistance to pear psylla and fruit quality and production traits. Germplasm with at least medium-sized fruit have been used in preference to the small

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Annick Moing, Jean-Luc Poëssel, Laurence Svanella-Dumas, Michèle Loonis, and Jocelyne Kervella

Prunus davidiana (Carr.), a wild species with poor fruit quality that is related to peach [Prunus persica (L.) Batsch], is used as a source of resistance to pests and diseases in peach breeding programs. Two genotypes of P. davidiana were studied for fruit biochemical composition and compared to three genotypes of P. persica (`Summergrand', `Bailey' and `Pamirskij'), and two P. persica × P. davidiana hybrids. Fruit of P. davidiana clones had higher malic acid, neochlorogenic and cryptochlorogenic acid and lower sucrose concentrations than fruit of all P. persica genotypes, even poor-quality Bailey. Differences in biochemical composition could be related to sensory evaluation. P. persica × P. davidiana hybrids had intermediate values between their parents for neochlorogenic acid concentration. They were similar to the P. persica parent for total soluble sugar, malic and citric acid, amino acid and catechin concentrations, indicating possible rapid progress for fruit quality in a breeding program.

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Sara Serra, Rachel Leisso, Luca Giordani, Lee Kalcsits, and Stefano Musacchi

limit inconsistent annual flowering and fruit set ( Embree et al., 2007 ), improve fruit quality ( Baugher and Schupp, 2010 ), and decrease susceptibility to storage disorders ( Robinson and Watkins, 2009 ). ‘Honeycrisp’ has exhibited an extreme

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Ibrahim I. Tahir, Sven-Erik Svensson, and David Hansson

fruit quality and storage potential, as well as reducing weed competition ( Granatstein and Mullinix, 2008 ; Stefanelli et al., 2009 ; Zoppolo et al., 2011 ). Herbicides are recognized as being a highly effective and relatively inexpensive method for

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Yong Zhang, Chunxia Fu, Yujing Yan, Yan’an Wang, Ming Li, Meixiang Chen, Jianping Qian, Xinting Yang, and Shuhan Cheng

starch synthesis ( Hacisalihoglu et al., 2003 ). The apple is among the four most popular fruits in the world, and as an essential fruit for human health, high fruit quality is important. Zn deficiencies affect production and quality of all crops

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Alan Chambers, Pamela Moon, Yuqing Fu, Juliette Choiseul, Jinhe Bai, Anne Plotto, and Elizabeth Baldwin

octoploid, Fragaria × ananassa strawberries, from December to March ( MacKenzie et al., 2011 ). Cultivars specifically bred for this location have demonstrated high yield, disease resistance, and fruit quality ( Whitaker et al., 2011 ). In contrast

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Matthew D. Stevens, John D. Lea-Cox, Brent L. Black, and Judith A. Abbott

study of direct marketing of strawberries for North Carolina, Safley et al. (2004) found that the predominant reasons cited by PYO consumers for picking less fruit than they expected were poor fruit quality (31.1%), fields were picked over/not enough

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Nana Millicent Duduzile Buthelezi, Tieho Paulus Mafeo, and Nhlanhla Mathaba

fruit quality and yield by mitigating extreme weather changes, bringing on harvests and reducing reliance on pesticides ( Binbin et al., 2015 ; Kyrikou and Briassoulis, 2007 ). Most preharvest plastic bagging materials consist of polypropylene, which is

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Thomas A. Obreza, Robert E. Rouse, and Kelly T. Morgan

nutritional effects on citrus yield and fruit quality emphasize the importance of judiciously using P fertilizer. The objective of this experiment was to establish guidelines for P management in developing Florida grapefruit and orange orchards by determining