Insecticidal activity of four essential oils against diamondback moth, plutella xylostella linnaeus (Lepidoptera: Pyralidae)

Issue Date

6-2016

Abstract

Essential oils from the leaves of Lantana camara (Linnaeus) and Coleus amboinicus (Loureiro), and rhizomes of Alpinia pyramidata (Blume) and Curcuma longa (Linnaeus) were evaluated for their contact toxicity through the topical method and the leaf residue film method (LRFM); antifeedant activity and repellency through LRFM; and growth regulatory activity through topical application against second instar larvae of the diamondback moth, Plutella xylostella (Linnaeus). Among the four essential oils, Cu. longa was the most toxic to the diamondback moth. It was applied topically (LD50 = 32.98 uμg g-1) and through LRFM (LC50 = 118.23 ppm) and provided the highest repellency at 250 ppm. Co. amboinicus ranked second in topical toxicity (LD50 = 34.71 uμg g-1) and also showed remarkable insect growth regulatory activity expressed in high larval mortality and high abnormality among the pupae and adults produced. Only A. pyramidata provided the highest antifeedant activity at 125 ppm.

Source or Periodical Title

Philippine Agricultural Scientist

ISSN

0031-7454

Volume

99

Issue

2

Page

156-163

Document Type

Article

Physical Description

illustrations, tables

Language

English

Subject

Alpinia pyramidata, Antifeedant, Botanical insecticide, Coleus amboinicus, Curcuma longa, Essential oils, Lantana camara, Plutella xylostella, Repellency, Topical toxicity

Digital Copy

yes

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