Evaluation of alternatives to fungicide to control postharvest gray mold alone or with ozone storage in grapes, 2011.

摘要

Gray mold, caused by B. cinerea, causes severe losses since it spreads easily among berries during cold storage. Currently, it is controlled by fumigation with SO_2 or SO_2-emitting sheets within boxes. Alternative methods, such as storage in ozone atmospheres, are needed because SO_2 is banned in organic agriculture and consumers prefer to avoid SO_2 residues. The effectiveness of three alternative treatments to control postharvest gray mold alone or in combination with ozone atmosphere storage wereevaluated. The trial was arranged using a completely random experimental design, with five or six clamshell boxes (replicates) prepared for each treatment. Approximately 1.5 kg of freshly harvested, organic 'Princess Seedless' grapes were dipped for 60seconds in 1% vol/vol hydrogen peroxide (30% a.i. hydrogen peroxide, Brenntag Pacific, Inc., Fresno, CA) containing 6mM copper sulfate (Sigma-Aldrich Chemical Co., St, Louis, MO), 1% wt/vol chitosan (99% a.i. chitosan, Chito Plant, ChiPro GmbH, Bremen, Germany), or 0.5 % wt/vol potassium sorbate (99% a.i. potassium