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- Author or Editor: J. Waks x
- HortScience x
Abstract
An inexpensive method for accurate control and measurement of fresh air introduction into experimental storage rooms is described.
Abstract
With the expected ban on ethylene dibromide fumigation, cold exposure remains the only quarantine treatment for citrus fruit against the Mediterranean fruit fly. Following a cold treatment, ‘Marsh’ grapefruit (Citrus paradisi Macf.) developed chilling injury (Cl), mostly in the form of slight peel pitting on 3% to 10% of the fruit depending on the season and on other factors. There was no difference in the incidence of Cl between fruit treated at 0°C for 10 days or at 2.2° for 16 days as regulations require. The cold treatment also enhanced decay development during long-term storage of the fruit at 11°. Mold rots developed on Cl peel pitting, and their incidence increased from 1.7% to 3.5% during a storage period of 12 weeks. The presence of the fungicide Thiabendazole (TBZ) in the wax coating of the fruit reduced the incidence of Cl by more than 50%. Delayed cooling, i.e., keeping the freshly harvested packed fruit for 6 days at 17°C prior to initiation of cold treatment, reduced the incidence of Cl by the same extent. By combining a TBZ treatment with delayed cooling, the susceptibility of grapefruit to Cl can be reduced, and cold treatment can be practiced with a low risk of Cl and subsequent decay development.
Abstract
Waxes containing 2,4-dichlorophenoxyacetic acid (2,4-D), when applied to ‘Valencia Late’ orange and ‘Marsh Seedless’ grapefruit, were effective in preserving green buttons and in controlling stem end rot during prolonged storage. The effect of 2,4-D on grapefruit was evident in fruit stored at 10 and 12°C. In orange, the 2,4-D effect was especially evident in fruit stored at 17°C, a temp at which the incidence of rot is generally high.
Abstract
Incorporation of thiabendazole (TBZ) in the wax coating applied to grapefruit significantly reduced the amount of low temp pitting which developed during prolonged storage at 8 and 12°C.