Resistance factors in pepper inhibit larval development of thrips (Frankliniella occidentalis)

The western flower thrips [Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)] is a major pest in pepper cultivation. Therefore, host plant resistance to thrips is a desirable trait. The objectives of this study were to determine the effect of resistance on the development of thrips and...

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Bibliographic Details
Published in:Entomologia experimentalis et applicata 2012-10, Vol.145 (1), p.62-71
Main Authors: Maharijaya, Awang, Vosman, Ben, Verstappen, Francel, Steenhuis-Broers, Greet, Mumm, Roland, Purwito, Agus, Visser, Richard G.F., Voorrips, Roeland E.
Format: Article
Language:English
Subjects:
Alkanes
behavior
Capsicum annuum
colorado potato beetle
Flowers
Frankliniella occidentalis
Gas chromatography
glandular trichomes
growth
Host plants
host-plant quality
Infestation
insect
larval mortality
life-history parameters
Mass spectroscopy
Metabolites
metabolomics
Mortality
Oviposition
oviposition rate
Pests
Plant resistance
R&D
Research & development
Secondary metabolites
Solanaceae
Survival
Thripidae
Thysanoptera
tocopherol
tocopherols
western flower thrips
wild tomato
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Summary:The western flower thrips [Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)] is a major pest in pepper cultivation. Therefore, host plant resistance to thrips is a desirable trait. The objectives of this study were to determine the effect of resistance on the development of thrips and to identify metabolite compounds related to the resistance. Three highly resistant, three medium resistant, and three susceptible pepper accessions were used in this study. Adult and pre‐adult survival, developmental time, and oviposition rate were assessed. Gas chromatography‐mass spectrometry was used to identify compounds that correlate with the level of resistance to thrips. Our results show that resistance of pepper accessions has a significant effect on oviposition rate and larval mortality. Seven compounds were identified that correlate with resistance to thrips and six compounds were identified that correlate with susceptibility to thrips. Some of these compounds, such as tocopherols, were previously shown to have an effect on insects in general. Also, some specific secondary metabolites (alkanes) seem to be more abundant in susceptible accessions and were induced by thrips infestation.
ISSN:0013-8703
1570-7458
DOI:10.1111/j.1570-7458.2012.01304.x