optimum for 50 days and near the minimum 

 acceptability for 90 days when fruit were 

 picked before starch index reached 4.0. 

 When fruit were picked after a starch index 

 of 4.0, SmartFresh maintained finnness near 

 minimum acceptabihty for 50 days, hi 

 untreated fruit, firmness fell below 1 2 lbs. by 

 50 days with little difference between the 

 two harvest dates. 



Senescent breakdown was not affected 

 by SmartFresh in 2001 when incidence was 

 approximately 10%. Occurrence of senes- 

 cent breakdown in 2002 was slight in fruit 

 from the first harvest, so SmartFresh had no 

 effect on its occurrence (Figure 2). hi fruit 

 from the second harvest, senescent break- 

 down was more prevalent, and was reduced 

 by SmartFresh after both 50 and 90 days 

 storage. In 2003, there was almost no 

 senescent breakdown in either treatment 

 after 50 days, so SmartFresh had no effect on 

 its occuiTence. After 90 days, senescent 

 breakdown was more prevalent, and 

 SmartFresh reduced its occurrence. Macoun 

 is very prone to senescent breakdown, which 

 occurred in each year of the study, but was 

 most severe in 2002. It began to develop in 

 untreated fruit as early as 50 days in storage. 

 SmartFresh reduced the occurrence of 

 senescent breakdown, but did not completely 

 prevent it, since SmartFresh-treated fruit 

 eventually developed it, as well. 



SmartFresh increased the occurrence of 

 coreline browning in 2001, but this was 

 slight and insignificant in fruit from the first 

 harvest (Figure 3). In fruit that were very 

 mature at harvest, SmartFresh increased the 

 incidence of coreline browning. Incidence of 

 coreline browning was highly variable from 

 year to year, being veiy prevalent in 2002 and 

 almost nonexistent in 2003. In these two 

 years, SmartFresh reduced the incidence of 

 coreline browning. It is not clear why 



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 40 



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2001 



2003 



1st Harvest 



f 



2nd Harvest 



Figure 3. Coreline browning in Macoun after 100 days regular 

 air storage in 2001, and 50 days in 2002 and 2003. 



Fruit Notes, Volume 69, Summer, 2004 



15 



