5. Morphometric Detection of Mango Fruit Fly Collected from Different Mango Growing Regions of Bangladesh

Abstract

Adult fruit flies were collected from the farmer’s orchard of Dinajpur and Thakurgaon districts during the period from April to June 2020 for morphometric detection of mango fruit fly collected from different mango growing regions of Bangladesh. Five locations of each Dinajpur and Thakurgaon district were selected and surveyed for collection of mango fruit fly. The samples were used in detecting the morphometric similarities/dissimilarities at the Entomology Laboratory of Sher-e-Bangla Agricultural University. The locations for collection of the samples in Dinajpur district were Biral, Bochagonj, Kaharole, Fulbari and Khanshama and in Thakurgaon were Sadar, Pirganj, Ranisankail, Baliadangi and Haripur. Data were collected on wing, head, thorax and abdomen of fruit flies and further study was ensured. The fruit fly samples were collected using pheromone trap (methyl-eugenol) at mango orchards. Four different species were morphometrically identified using stereomicroscope. Oriental fruit fly (Bactrocera dorsalis), melon fruit fly (Zeugodacus cucurbitae), pumpkin fruit fly (Zeugodacus tau), and peach fruit fly (Bactrocera zonata) were the four species of fruit flies that were identified. Total 85.41% of oriental fruit flies were found in pheromone trap which was the highest in number among the collected species. However, 2.44 % of peach fruit fly were identified which was the lowest number of fruit fly. Moreover, 8.81% and 3.34% percent of melon fruit fly and pumpkin fruit fly were collected from pheromone trap respectively. Therefore, number of oriental fruit flies were highest compared to others. The highest infestations were observed at Dinajpur district compared to Thakurgaon district in mango orchard. Dinajpur district’s oriental fruit fly was larger compared to Thakurgaon district’s oriental fruit flies.