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Pruning is one of the techniques to improve plant growth and production. The aim of this research was to determine the effect of pruning on vegetative and generative growth, and fruit quality of 'Crystal' guava. The experiment was conducted from September 2016 to April 2017 at Cikabayan Research Station of Bogor Agricultural University, Dramaga, Bogor, Indonesia (-6.550780, 106.714531). The experiment used completely randomized design with six replications. There were three treatments i.e. a) pruning by leaving 4 pairs of leaves, b) pruning by leaving 8 pairs of leaves, and c) control (without pruning). Pruning was applied after shoot leaves grew fully. The result showed that pruning significantly increased the total number of shoots and generative shoots. Pruned plants produced more flower and fruit than un-pruned ones. Pruning by leaving 4 pairs of leaves tended to produce higher number of flower and fruit than those by leaving 8 pairs of leaves. Fruit weight and internal fruit quality were not affected by pruning. [ABSTRACT FROM AUTHOR]

Indonesia has number of accessions and cultivars of pummelo which are prospective to be developed. Pummelo contains higher antioxidants thus beneficial for health. This research aimed to get information of physical and chemical quality differences, antioxidant capacity, and explain the relationship between fruit quality and antioxidant capacity of selected seeded pummelo cultivars. Fruit was harvested in Banyuwangi and Magetan while fruit quality assesment was conducted in Laboratory of Agronomy and Horticulture Department, IPB. The results showed that physical qualities of fruit (weight loss, peel softness and peel color) and chemical qualities (total soluble solids and total titratable acidity) were changed during storage. Adas Nambangan and Banyuwangi cultivars have better physical and chemical qualities than other cultivars during storage until 10 weeks after harvest because of good visual appearance, the lowest decreased in weight loss and the good ratio of TSS:TTA. Seeded pummelo cultivars with dark red to reddish white fruit pulp had significant higher total phenolic, carotenoid, anthocyanin and antioxidant capacity than white fruit pulp. There were negative correlations between antioxidant capacity with colored pulp and total phenolic content. Banyuwangi had the highest antioxidant capacity in the pulp, followed by Bali Merah, Adas Nambangan, Pamelo Magetan, Srinyonya, Bali Putih cultivars. [ABSTRACT FROM AUTHOR]