Thesis (BS Biology) -- University of the Philippines Mindanao, 2000

Lenticel spotting (LS) was observed in Carabao mango fruit. It was observed to occur in the mangoes sold in the local markets. The highest incidence of LS (4.85) was observed in the Agdao public market. Incidence of LS in Carabao mangoes is influenced by hot water treatment (HWT), field bagging, and the month of harvest. LS after one week in ambient conditions was highest (4.98) in non-bagged and HW-treated fruit harvested in August. Relative to the stem-end and middle portions. LS was highest in the fruit apical portion. Field bagging improved fruit quality due to efficient protection from the elements and disease-causing microorganisms. The shelf-life of HW-treated was longer (10.83 days) despite the shorter days to reach ripe stage. HWT increased the incidence of LS regardless of bagging and harvest date. Microscopic observations of lenticels were also done. Lenticels appear as small white dots on green, newly harvested mangoes. During the yellow ripe stage, some discoloration of the area around the lenticel was observed resulting in conspicuous brown-black spots. The mean lenticel size for green, mature, ripe, and yellow mangoes were 181.5 and 264m, respectively. Mean lenticel depth and width in ripe, yellow fruit were 110 and 143m, respectively