Field biology, setal map and adult genitalia of the citrus rind borer Prays endolemma Diakonoff Lepidoptera Yponomeutidae on pummelo Citrus maxima (Burm) Merr (Rutaceae) in Region XI Philippines

Issue Date

4-2012

Abstract

Citrus rind borer (CRB) is a major threat to pummelo, particularly in Region XI. Very little is known about the biology, identifying features for proper species identification, including detailed description of the insect. Hence, the biology of CRB was investigated under laboratory and field condition. The egg hatches in 3-4 days. The larval period ranges from 13 to 15 days, the end indicated by the coming out of the last-instar larva from the rind to pupate. The pupal period lasts for 4 days. In summary, the total developmental period from egg laying to adult emergence was 20 to 23 days. Eggs are flat, almost circular, cloudy white, measuring .048 mm in diam and laid singly on the surface of the pummelo fruits as early as fruit setting. Last instar larva (5.5±0.22 mm) crawls out of the rind. It is dark to light green in color with the red stripes very prominent intersegmentally from first thoracic to the 9th abdominal segment. Pupa measures 4.5±0.513 mm long, enclosed in a lacelike, large-meshed cocoon. Adult measures 4.05±0.605 mm long and generally grayish brown in color with dark brown markings. Dissected female genitalia shows distinct ductus bursae with short tubular upper third and sclerotized wide lower part formed by two broad sclerites (cestum), each bearing a dentate ridge the species was named after, Prays endolemma Diakonoff.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

26

Issue

1

Page

65-92

Document Type

Article

Frequency

semi-annually

Physical Description

illustrations ; tables

Language

English

En – AGROVOC descriptors

YPONOMEUTIDAE; LEPIDOPTERA; PEST OF PLANTS; CITRUS MAXIMA; PUMMELOS; GENITALIA; PHILIPPINES

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