Relation between banana fruit green life fruit age and development stage for different growing conditions
2001
Julien, A. | Chillet, M. (CIRAD-FHLOR, Neufchateu, Sainte Marie, 97130 Capesterre Belle Eau, Guadalupe (French West Indies) Malezieux, E.
Fruit green life at harvest is an important quality parameter for banana. To qualify for export from the French West Indies to Europe, banana fruits should have a green life of more than 20 days at 13 deg C. Green life depends on harvest date, the later the bunch (in florescence) is harvested, the shorter the green-life. In the French West Indies, harvest is decided when fruits have reached a fixed diameter (34 mm). Using this criterion, an important variability in green life is observed at harvest for equivalent fruit diameter, depending on growing conditions. For uniform fruit quality at harvest, it seems important to define an indicator of green life that can be used in the choice of harvest date. The authors hypothesized that green life was related to fruit maturity i.e., to fruit development stage at harvest. In consequence, they investigated the relation between fruit age and green life on one hand, and between green life and pulp composition (malic and citric acids), on the other hand. This was tested for different growing conditions (bunch trimming, leaf shading, bunch bagging, crop stresses). For each situation, fruit age was calculated in degree-day (dd, base temperature: 14 deg C) and pulp composition was analyzed. An exponential negative relation was found between green life and fruit age and was validated for each growing condition. It was concluded that fruit age in degree-day is an important indicator that could be used to determine harvest date. Organic acid content of the pulp seems to be an interesting indicator of fruit green life
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