EFFECT OF WATER STRESS AND CHEMICAL SPRAY TREATMENTS ON POSTHARVEST QUALITY IN MANGO FRUITS CV. HADEN, IN MICHOACAN, MEXICO
The quality of the mango fruit is acquired during the development of the plant, for this reason it is necessary to know in situ the factors that influence in more or smaller degree in postharvest fruit quality. These are : the climatic factors (temperature, wind, rain, quality of air and solar light), factors of crop handling, among those highlights are the rootstocks, varieties, plantation design, pruning, the appropriate use of watering, chemical application like regulators of growth and nutrition, as well as pests and diseases control. An experiment was settled down in mango cv Haden where two periods of water stress were evaluated, 45 and 30 days before flowering date. Three chemical products (Ethephon, Tribasic Sulfate Copper + Sulfurate humectable and Propiconazol + Metidation) were applied in both periods of water stress. The objective of this research was to evaluate the effect of these treatments in postharvest fruit quality. Longitude, diameter and weight of fruit; incidence of internal darkening, firmness, total soluble solids, titratable acidity, physiological weight losses, percentage of reddish color of fruits and respiration rate were evaluated. In treatment of 45 days water stress, the fruits presented bigger weight (g), incidence and severity of internal darkening, firmness, titatable acidity and percentage of reddish skin color of fruit in scales of 25–50 and 50–75% in contrast to treatment of 30 days water stress. In chemical sprays treatments, smaller incidence of internal darkening was presented in the treatment of Tribasic Sulfate Copper + Sulfurate humectable in contrast to the other ones; Ethephon treatments presented the biggest firmness, titratable acidity and biggest number of fruits with reddish color, in contrast to Propiconazol + Metidation treatments. Mango fruits reached its climateric peak of respiration at six days after harvest.
Pina, A., Angel, D. and Nevarez, G. (2000). EFFECT OF WATER STRESS AND CHEMICAL SPRAY TREATMENTS ON POSTHARVEST QUALITY IN MANGO FRUITS CV. HADEN, IN MICHOACAN, MEXICO. Acta Hortic. 509, 617-630
Mangifera indica, chemical sprays, internal darkening, post-harvest quality, mango fruit, water stress