Comparative biologies of Philippine eggplant fruit and shoot borer, Leucinodes orbonalis Guenee, reared on natural and artificial diets

Issue Date

10-2013

Abstract

Larvae of eggplant fruit and shoot borer (EFSB), Leucinodesorbonalis Guenee were collected from nine eggplant growing areas in the Philippines: Sta. Maria, Pangasinan (Region I); Isabela (Region 2); Los Banos, Laguna (Region 4-A); Balete, Batangas (Region 4-A); Pili Camarines Sur (Region 5); Sta. Barbara, Iloilo (Region 6); and Kidapawan, North Cotabato (Region 12). The EFSB larvae of each population were fed continously with either fresh slice of eggplant fruit or modified Southland multiple species diet. The duration (days) of each developmental stage (egg to adult) fed on two substrates was determined and compared among populations. When reared on eggplant fruit slices, total development (egg-adult) was longest among Cotabato-EFSB (31.37d) and shortest among Pangasinan-EFSB (27-03d). The duration of total developmental period of EFSB from various growing areas reared on natural diet in descending order were as follows: Cotabato = Bicol > Batangas > Quezon > Isabela > Iloilo > Laguna > Leyte > Pangasinan. Total duration of larval of larval period was longest in Bicol-EFSB (11.90d) and shortest in Leyte-EFSB (9.53d) and ranked in descending order as: Bicol = Batangas = Isabela = Cotabato = Iloilo = Laguna = Pangasinan = Leyte. When EFSB from various collection areas were reared on modified artificial diet, total developmental period ranged from 34.00 to 41.33d for both Isabela-EFSB and Quezon-EFSB (populations, respectively. The duration of total developmental period of EFSB from various growing areas reared on artificial diet in descending order were: Quezon = Iloilo = Cotabato = Laguna = Batangas = Leyte > Bicol > Pangasinan > Isabela. Duration of total larval period was longest in Quezon-EFSB (21.27d) and shortest in Pangasinan-EFSB (15.70d) and is ranked in descending order as: Quezon = Iloilo = Laguna > Leyte > Batangas > Cotabato > Bicol = Batangas > Pangasinan. In general, EFSB continuously reared on modified Southland multiple species diet completed its development written a significantly longer than when fed with eggplant fruit slice. The results obtained suggest that the differences in duration of developmental stages observed among EFSB samples collected from different areas may not be due to ecotypic variation but reflecting the natural range of variation within the species.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

27

Issue

2

Page

211

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

LEUCINODES ORBONALIS; SOLANUM MELONGENA; EGGPLANTS; REARING SYSTEMS; DEVELOPMENTAL STAGES; PHILIPPINES

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