Start Date: Mar 15, 2012
End Date: Sep 30, 2016
Materials to stimulate (ethephon) or reduce (1-methylcyclopropene) ethylene production and activity, respectively, will be applied to apple and pear fruit at various rates and selected intervals prior to and/or after harvest. Physiological (volatile production, respiration, ethylene-related metabolites) and horticultural (color, weight, firmness, acidity,sugar content) indicators of fruit development will be determined using fruit sampled at various intervals at harvest and after storage. All evaluations will be conducted at the Tree Fruit Research Laboratory in Wenatchee.