Successive rearing of local strains of fruit and shoot borer (Leucinodes orbonalis Guenee) on a modified beet armyworm diet

Issue Date

10-2013

Abstract

The modified beet armyworm diet (bioserv Diet No. F9220B, Bio-Serv, USA) used in the trial has wheat germ meal as the primary constituent and was modified by addition of dried eggplant powder. The growth and development of the local strains of fruit and shoot borer (FSB) collected from different sites (Nueva Ecija and Batangas) were monitored for eight generations. The developmental period of all stages remained the same in all generations but it was the efficiency of the diet in terms of yield (number of mature insects produced in proportion to number of eggs or larvae originally placed on the diet tested) which decreased. Pupae produced were fewer as well as the adults that emerged after generation. Oviposition records showed that the increase in number of eggs produced in the latter 2 generations compensated for the decrease from the other stages, but not for the eggs viability. Records for each generations indicated that an average of 30% of the larvae originally placed on the diet would grow into adults and, to maintain this and preserve diversity of the population wild population, must be added after every 4th generation.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

27

Issue

2

Page

210-211

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

LEUCINODES ORBONALIS; LARVAE; REARING SYSTEMS; OVIPOSITION; DEVELOPMENTAL STAGES

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