Effect of oviposition by Bactrocera dorsalis on the antioxidant activity of orange juice

Abstract

Among fruits and fruit products, oranges and orange juice are the most widely consumed worldwide. However, the effects of pest infestation of oranges on the quality of orange juice are not yet known. To evaluate the effect of the oriental fruit fly Bactrocera dorsalis on the antioxidant activity of orange juice, we measured changes in the vitamin C (Vc) concentration, total phenol content, and antioxidant activity of orange juice after the introduction of fruit fly eggs. Ten days after the eggs were introduced (larvae removed), the concentration of Vc in orange juice was 18.65 µg/mL, which was 9.16 µg/mL lower than that measured in healthy orange juice. In addition, the total phenol content decreased by 46.519 mg Gallic Acid Equivalents (GAE)/g to 9.748 mg GAE/g. Furthermore, the free-radical scavenging activity decreased from 22.297% to 5.393%. Correlation analysis indicated significant correlations between Vc concentration, total phenol content, and antioxidant activity of orange juice after B. dorsalis infestation. The decrease in Vc concentration, total phenol content and free-radical scavenging activity indicated that B. dorsalis changed the quality of orange juice by affecting the antioxidant activity of the juice after the oranges were infested.

Diversity of Fruit Flies (Diptera: Tephritidae) on Sweet Orange Plantations in Central Bangka Regency, Bangka Belitung Islands Province

“…Buah jeruk dapat dipergunakan sebagai bahan pangan potensial untuk antivirus dan untuk meningkatkan daya tahan tubuh karena mengandung zat antioksidan, vitamin C, vitamin A, tiamin, niasin, riboflavin, asam folat dan inositol, serta flavonoid dan limonoid (Sukasih 2020). Menurut Ni et al (2020), jeruk dan jus jeruk merupakan produk yang paling banyak dikonsumsi di seluruh dunia di antara jenis buahbuahan dan produk buah-buahan lainnya. Permintaan akan buah jeruk impor di Indonesia mengalami kenaikan tiap tahun seiring dengan meningkatnya kesadaran masyarakat untuk hidup sehat, meningkatnya daya beli masyarakat, dan perkembangan agribisnis jeruk substitusi jeruk impor relatif stagnan (Kementerian Pertanian 2012).…”

“…Infestasi lalat buah menyebabkan kerusakan mutlak sehingga buah tidak dapat dikonsumsi dan kehilangan nilai ekonominya. Penelitian Ni et al (2020) melaporkan bahwa lalat buah yang menginfestasi buah jeruk mengakibatkan permukaan kulit buah jeruk tidak menarik karena terdapat bercak-bercak cokelat dipermukaan buah akibat tusukan ovipositor lalat buah betina, warna sari buah tidak cerah, dan kandungan vitamin C, senyawa fenol, dan antioksidan turun secara nyata. Omoloye et al (2016) melaporkan hal serupa yaitu infestasi lalat buah pada jeruk merusak estetika buah jeruk, warna jus jeruk kurang menarik, menurunkan kandungan gizi, mengubah cita rasa dan aroma, buah membusuk, dan buah mudah terserang oleh cendawan penting pascapanen jeruk seperti Penicillium digitatum atau Penicillium notatum.…”

Distribution and Identification of Fruit Flies (Diptera: Tephritidae) Attracted on Methyl Euganol and Cue Lure in Central Bangka Regency, Bangka Belitung

“…Fruits that were infested with fruit flies would be rotten, less aesthetics, has lower nutritional content, change in taste and aroma, and susceptable to important post-harvest fungi such as Penicillium digitatum Sacc. or P. notatum (Omoloye et al, 2016;Ni et al, 2020). Fruit flies directly damages host fruits and indirectly caused the loss of export opportunities for horticultural products due to quarantine regulation from importing countries to prevent the entry of fruit flies into the country (Vargas et al, 2007).…”