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United States Department of Agriculture

Agricultural Research Service

Research Project: LIPOPHILIC COATINGS TO REDUCE CUTICLE DISORDERS IN APPLES
2008 Annual Report


1a.Objectives (from AD-416)
This project will strengthen synergy between PACE International LLC hereinafter called the Cooperator, and the United States Department of Agriculture, Agricultural Research Service, hereinafter referred to as ARS in a collaborative effort to develop topically applied lipophilic compounds suitable for either conventional or designated ‘organic’ orchards, to be used as remedial or prophylactic treatments to reduce physiological apple disorders related to peel cracking, lenticel markings or lenticel breakdown (LB).


1b.Approach (from AD-416)
Lenticel breakdown (LB) is a cuticle disorder occurring mainly on ‘Gala’ and ‘Fuji’ apples. For the past several years, LB has been among the top priorities of the Washington Tree Fruit Research Commission. Recent work at ARS in Wenatchee has elucidated the dynamics of fruit epidermal tissue—how the apple peel stretches, grows and responds biochemically and structurally to changes in environmental conditions—and has expertise on the nature of LB. On the other hand, PACE International LLC has formulary expertise with a history of successful applications in the tree fruit industry worldwide. Together, we propose to investigate different formulations of natural lipids and lipophilic compounds for their effects on fruit cuticle ultrastructure and fruit cuticle disorders. Documents Non-Funded Cooperative Agreement with Pace International LLC.


3.Progress Report

This report documents research conducted under a Non-Funded Cooperative Agreement between ARS and Pace International LLC. Data from our previous research suggested lipophilic coatings applied preharvest were effective not only for reducing lenticel breakdown of ‘Gala’ apples stored at 31 °F for up to 180 days, but also for reducing moisture loss of fruit during storage. Experimental trials planned for the current season include effects of pre- and/or postharvest application of lipophilic coatings on moisture loss of ‘Gala’ and ‘Golden Delicious’ apples in regular and controlled atmosphere storage. Preharvest treatments will include 0, 1 or 2 foliar applications of lipophilic coatings and postharvest treatments will include all preharvest treatments plus drenching with lipophilic emulsions both before and after treatment with SmartFresh™. Monitoring of progress was accomplished through periodic phone calls, emails and meetings.


Last Modified: 9/21/2014
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