Jeorge H. Gregori, Ron Albert R. Tumasis, Leandre R. Yeban(January 2002)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
This study in a completely randomized design aimed to determine the effect of temperature on the shelf life, weight loss and susceptibility to anthracnose and diplodia stem-end rot of newly harvested mangoes. It also determined the significant differences in the effect of hot-water treatment (55 degree Celsius), cold-water treatment (4 degree celsius) and ice treatment (0 degree celcius) on the shelf life, weight loss and susceptibility to these fungal infections. It is hypothesized that there is no significance difference in the shelf life, weight loss and susceptibility to anthracnose and diplodia stem-end rot of newly harvested mangoes in the different temperature treatments. This study employed the mean and standard deviations as descriptive statistical tests, while the One-Way Analysis of Variance (ANOVA) was employed as inferential statistical test. The Scheffe Test was used as a post-hoc multiple comparison test. Results showed that the hot water treatment was the most effective treatment in terms of the shelf life of the newly harvested mangoes, followed by the non-treatment, and cold water treatment. Since there were no significant differences in the shelf life of the mangoes in the hot water, cold water treatment and the non-treatment groups, they were as effective as each other. Ice water treatment was the least effective. In terms of weight loss of the newly harvested mangoes, the cold water treatment was the most effective, followed by the ice and hot water treatments. Although the cold water treatment proved to be the most effective, the hot water treatment and the ice treatment procedures were as effective as well. Non-treatment of the temperature was the least effective. In terms of susceptibility to anthracnose and diplodia stem end rot of newly harvested mangoes, the hot water treatment and the cold water treatments prevented the development of infection after 10 days. The ice treatment allowed the development of anthracnose and diplodia stem end rot (both 1%-25%) after 10 days while the non-treatment of the temperature allowed the development anthracnose (76%-100%) and diplodia stem end rot (26%-50%) after 10 days. The hot water, cold water, and ice treatment are more effective in delaying the development of anthracnose and diplodia stem end rot than non-treatment.