**5. Conclusions**

The dual release pads were more effective at preventing the incidence of gray mold and mass loss in 'BRS Vitoria' seedless grapes than slow release pads in both storage periods. Incidence of shattered berries were lower when any type of SO2 pad was used during cold storage, and no effects were observed on stem browning, firmness, and berry skin color of 'BRS Vitoria' grapes. In this context, conscientious and effective use of SO2 pads for packaging grapes, especially the dual release pad, enabled the long-term maintenance of 'BRS Vitoria' table grapes under refrigerated storage conditions.

**Author Contributions:** S.R.R. conceived the research idea; A.R.D., S.A., M.S., O.J.C.J., C.H.S. and R.T.d.S. helped during collection of the data; A.R.D. also analyzed the data and wrote the paper.

**Funding:** This research was funded by Brazilian Council for Scientific and Technological Development (CNPq) and The World Academy of Sciences (TWAS) gran<sup>t</sup> number 190015/2014-4.

**Acknowledgments:** The author heartfelt thanks to the Londrina State University, Food Sciences Department and Prof. Sergio R. Roberto for his kind advisory and valuable comments used to help us with the improvement of the quality of our manuscript.

**Conflicts of Interest:** The authors declare no conflict of interest.
