Biology and abundance of the striped flea beetle, Phyllotreta striolata (F.) (Coleoptera: Chrysomelidae), on Pak Choi, (Brassica campestris var. chinensis (L.)

Issue Date

10-2005

Abstract

The biology of striped flea beetle, Phyllotreta striolata, was studied on detached pak choi leaves in the laboratory and on potted in the net house. Total developmental period was 18.35 ± 0.25 days on detached leaves and 25.86 ± 4.44 days on potted plants. Adult longevity was 39.68 ± 14.02 days for male and 36.56 ± 11.53 days for female. The mean fecundity was 619.08 ± 148.60 eggs/female. The sex ratio (male:female) was 0.90:1. Of the seven Brassicaceae species evaluated, pak choi, Brassica campestries var chinensis (L.), and Indian mustard, Brassica juncea (L.), were the most preferred host plants followed Chinese cabbage, B. pekinensis (Lour.). The least preferred was Chinses kale, B. oleracea (L.). Among the pak choi cultivars, Black Behi had the highest damage rating while Ching-Chang and Psai-Tsai had the lowest. Two Cleome weed species (C. viscose and C. rudisperma), of the family Capparidaceae, were likewise fed upon by P. striolata. Adults of P. striolata although present year round, were most abundant in March. Temperature and rainfall affected their abundance in the field. Lower population to almost nil, occurred during the wet months but higher population was present during the warm months.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

19

Issue

2

Page

202-203

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

PHYLLOTRETA STRIOLATA; BRASSICA CHINENSIS; CALENDULA; OREGANO; BASIL; LEAVES; PLANT EXTRACTS; PESTS OF PLANTS; REPELLENTS; PHILIPPINES

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