Abstract:
La naranja
es de entre los cultivos cítricos el más demandado y consumido a
nivel mundial. Sin embargo, las podredumbres relacionadas con la acción de
hongos fitopatógenos en este cultivo suponen una de las principales pérdidas
económicas en las cadenas de suministro. En la actualidad, el control d... Ver más
Globally, orange is among citrus crops the most demanded and consumed. Although, disease caused by fungus cause important economic losses in the supply chain. Currently, disease control is carried out with synthetic fungicides.
However, consumers demand alternatives without residues and that are healthily and environmentally friendly. Therefore, the aim of this study, is to grasp the effect of pre-harvest treatments of potassium silicate (SP) and sodium bicarbonate (BS) on ‘Navel’ oranges at harvest and after 42 days of chilled storage. After harvest, firmness was higher on fruits treated with SP 0,1 % and 1%, while the worst result was on fruit treated with BS 0,1 % and beins BS 0,1% and control equal. Regarding the citrus colour index (ICC), control fruits scored the highest values. In addition, there were no significant differences in maturity index (IM). After 42 days of chilled storage, fruits treated with BS 1% had higher weight loss and lower firmness, what was correlated with higher respiration rates. Regarding the phenolic total content and total antioxidant activity on the rind at harvest, fruits treated with BS 1% and SP 1% had lower concentration than other treatments. These differences were sustained after chilled storage. Finally, disease levels were higher in fruits treated with BS 0,1 % and SP 1 %. Therefore, treatments with BS and SP are an effective alternative for post-hravest disease control.
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