Effect of multilocation production on the reproductive growth, yield and quality of harumanis mango

Harumanis mango (Mangifera indica L.) is one of the most commercial and famous cultivars of mango grown in Malaysia for the past 15 years. Due to high quality and good eating preferences, the demand for this variety has increased yearly and most of the production is done in the northern region of Peninsular Malaysia specifically Perlis state. High demand of Harumanis mango caused the production acreage to be expanded to the neighboring state. However, there is insufficient information on the specific requirement of reproductive phase, yield and quality potential for production of Harumanis mango outside the Perlis state. Therefore, an evaluation was conducted at 3 different location of Harumanis mango farms which were located at same Agroclimate Zone 1 as Arau, Perlis (Control), MARDI Sintok, Kedah and Tanjung Sedili, Kota Tinggi, Johor for10 months observation. Data collection consisted of climatic data, reproductive growth, yield and quality assessment. Based on the result, the time of flowering process were initiated twice at Arau, Perlis in December 2017 and February 2018. While in MARDI Sintok and Tanjung Sedili, Johor, flowering was initiated on February 2018.Relative humidity at Tanjung Sedili, Johor was recorded as the highest and significantly different to the other locations for all 3 months observations. In terms of reproductive growth performance, data on whole flowering process, Tanjung Sedili, Johor, recorded the lowest and significant differences of the parameter measured as fruit to flower number ratio as compare to the other two locations. Grading of fruit weight (g) and percentage in MARDI Sintok, Kedah is found to be significantly higher compared to other locations for C grade (<350g). It is followed by B grade (350g-450g) where MARDI Sintok, Kedah and Tanjung Sedili, Johor recorded significantly higher number of grade B fruits compare to Arau, Perlis. However, most of the fruit in Arau, Perlis was recorded higher and significant different on A grade (450g>) of fruit weight. On the other hand, for physical fruit appearance, only a total fruit weight (g) parameter in MARDI Sintok, Kedah was observed significantly lowest amongst the locations. Quality assessment analysis showed the trend on the parameter of total titratable acidity and vitamin C for fruits in Tanjung Sedili, Johor was recorded the highest and significantly different compared to other locations.