Aphid-induced Defences in Chilli Affect Preferences of the Whitefly, Bemisia tabaci (Hemiptera

Aleyrodidae)

Khalid A. Saad, M. N. Mohamad Roff, Rebecca H. Hallett, Idris Abd. Ghani

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The sweetpotato whitefly (WF), Bemisia tabaci, is a major pest that damages a wide range of vegetable crops in Malaysia. WF infestation is influenced by a variety of factors, including previous infestation of the host plant by other insect pests. This study investigated the effects of previous infestation of host chilli plants by the green peach aphid (Myzus persicae) on the olfactory behavioural response of B. tabaci, using free-choice bioassay with a Y-tube olfactometer. We analysed volatile organic compounds (VOCs) emitted by non-infested and M. persicae-infested chilli plants using solid-phase microextraction and gas chromatography-mass spectrometry. Our results showed that female WFs preferred non-infested to pre-infested plants. Collection and analysis of volatile compounds emitted by infested plants confirmed that there were significant increases in the production of monoterpenes (cymene; 1,8-cineole), sesquiterpenes (β-cadinene, α-copaene), and methyl salicylate (MeSA) compared to non-infested plants. Our results suggest that host plant infestation by aphids may induce production of secondary metabolites that deter B. tabaci from settling on its host plants. These results provide important information for understanding WF host selection and dispersal among crops, and also for manipulating WF behaviour to improve IPM in chilli.

Original languageEnglish
Article number13697
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 3 Sep 2015

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Aphids
Hemiptera
Viridiplantae
Volatile Organic Compounds
Solid Phase Microextraction
Monoterpenes
Sesquiterpenes
Malaysia
Biological Assay
Vegetables
Gas Chromatography-Mass Spectrometry
Insects

ASJC Scopus subject areas

  • General

Cite this

Aphid-induced Defences in Chilli Affect Preferences of the Whitefly, Bemisia tabaci (Hemiptera : Aleyrodidae). / Saad, Khalid A.; Mohamad Roff, M. N.; Hallett, Rebecca H.; Abd. Ghani, Idris.

In: Scientific Reports, Vol. 5, 13697, 03.09.2015.

Research output: Contribution to journalArticle

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