Insecticidal activity of five ethanolic extracts against diamondback moth, Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae)

Issue Date

10-2017

Abstract

Ethanolic extracts from leaves of Lantana camara L., Plectranthus amboinicus (Lour.) Spreng., and Catharanthus roseus (L.) G. Don., and rhizomes of Alpinia galanga (L.). Willd. and Curcuma longa L. were evaluated for their contact toxicity through topical method and leaf residue film method (LRFM), antifeedant activity and repellency through LRFM , and insect growth regulatory (IGR) through topical application against second instar larvae of diamond moth (DBM), Plutella xylostella (Linnaeus). Among the five ethanolic extracts, L. camara was the most toxic against DBM by topical application (LD50= 203.37 ppm) and also showed the highest repellency at 125 ppm. Cu. Longa ans Ca. roseus exhibited high antifeedant activity when concentration was increased to 500 ppm. L. camara, Cu. Longa, and A. galanga showed remarkable IGR activities against DBM expressed in high larval and pupal mortalities, and short adult life span; highest repellency; and highest adult mortality, respectively. Among the ethanolic extracts, L. camara was the most promising since it consistently showed high contact toxicity, antifeedant and remarkable IGR activities against DBM.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

31

Issue

2

Page

167

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

LANTARA CAMARA; PLUTELLA XYLOSTELLA; INSECTA; PEST INSECTS; LEAF EXTRACTS; PLANT EXTRACTS; TOPICAL APPLICATION; BOTANICAL INSECTICIDE; INSECT CONTROL; ANTIFEEDANTS

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