Occurrence and distribution of the diagnostic characters of Bactrocera dorsalis (Hendel) and B. occipitalis (Bezzi) (DIPTERA: TEPHRITIDAE) in various local populations of fruit fly in the Philippines

Date

1-2022

Degree

Bachelor of Science in Agriculture

Major Course

Major in Entomology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Celia DR. Medina

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Abstract

One of the widely used diagnostic tools in distinguishing the sibling species of fruit fly, Bactrocera dorsalis and B. occipitalis uses six morphological characters: medial line on tergite 4 (C1), transverse dark band on tergite 3 (C2), lateral marks on tergite 4 (C3), ground color around pre-scutellar setae (C4), ground color around frontal setae (C5), and costal band depth (C6). This study evaluated the occurrence and distribution of these characters in several local populations of fruit fly from different host plants across the Philippines. The data consisted of field collection record of 3,243 individuals from 50 sampling events from 2007 to 2010. The pattern showed that C1 and C2 were not frequent in B. occipitalis populations, but both were frequent in the B. dorsalis population. Correspondingly, only C1 was frequent on intermediate species and C2 was not. However, this was not applicable to the intermediate individuals in the Guimaras sampling population. These results suggest that B. occipitalis, B. dorsalis, and intermediate species can be distinguished by examining the medial line on tergite 4 (C1) and transverse dark band on tergite 3 (C2).

Language

English

LC Subject

Fruit-flies--Classification--Molecular aspects, Fruit-flies--Geographical distribution, Agriculture, Entomology Institute of Weed Science, Entomology and Plant Pathology

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2022 A3 A83

Document Type

Thesis

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