Insecticide resistance increases the vector competence: a case study in Frankliniella occidentalis

Yanran Wan; Xiaobin Zheng; Baoyun Xu; Wen Xie; Shaoli Wang; Youjun Zhang; Xuguo Zhou; Qingjun Wu

doi:10.1007/s10340-020-01207-9

Insecticide resistance increases the vector competence: a case study in Frankliniella occidentalis

Yanran Wan, Xiaobin Zheng, Baoyun Xu, Wen Xie, Shaoli Wang, Youjun Zhang, Xuguo Zhou, Qingjun Wu

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The western flower thrips, Frankliniella occidentalis, is the most efficient vector for Tomato spotted wilt orthotospovirus (TSWV), a devastating plant pathogen. Insecticide resistance is a common issue in pest management. The interactions between insecticide resistance in insect vector and the transmission of plant pathogen, however, are largely unknown. In this study, we assessed the effects of spinosad resistance on TSWV transmission using a pair of near-isogenic lines of susceptible (Ivf03) and resistant (NIL-R) F. occidentalis. NIL-R had a prolonged pre-adult stage, but a shorter adult life span than Ivf03. More importantly, the pupation rate and sex ratio (female/male) in NIL-R were significantly reduced in comparison with Ivf03. When given a shorter acquisition access period (AAP) of 6 h, virus propagation and transmission efficiency in NIL-R were significantly higher than Ivf03. In contrast, a longer AAP of 96 h led to a similar virus acquisition and transmission efficiency for both strains, although TSWV replication was greater in NIL-R. Our combined results suggest that (1) substantial fitness costs (e.g., reduced pupation rate) are associated with spinosad resistance in F. occidentalis; however, (2) insecticide resistance increases vector competence.

Original language	English
Pages (from-to)	83-91
Number of pages	9
Journal	Journal of Pest Science
Volume	94
Issue number	1
DOIs	https://doi.org/10.1007/s10340-020-01207-9
State	Published - Jan 2021

Bibliographical note

Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

Funding

This study was funded by the national key R&D Program of China (2017YFD201000), the Natural Science Foundation of China (31572037 and 31772199), the Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences (CAAS-ASTIP-IVFCAAS), Beijing Leafy Vegetables Innovation Team of Modern Agro-industry Technology Research System (BAIC07-2018), and Beijing Key laboratory for Pest Control and Sustainable Cultivation of Vegetables.

Funders	Funder number
Beijing Key Laboratory for Pest Control and Sustainable Cultivation of Vegetables
Beijing Leafy Vegetables Innovation Team of Modern Agro-industry Technology Research System	BAIC07-2018
CAAS-ASTIP-IVFCAAS
National Natural Science Foundation of China (NSFC)	31772199, 31572037
Chinese Academy of Agricultural Sciences
National Key Basic Research Program of China	2017YFD201000

Keywords

Fitness cost
Frankliniella occidentalis
Spinosad resistance
TSWV
Vector competence

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Ecology
Agronomy and Crop Science
Plant Science
Insect Science

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10.1007/s10340-020-01207-9

Cite this

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title = "Insecticide resistance increases the vector competence: a case study in Frankliniella occidentalis",

abstract = "The western flower thrips, Frankliniella occidentalis, is the most efficient vector for Tomato spotted wilt orthotospovirus (TSWV), a devastating plant pathogen. Insecticide resistance is a common issue in pest management. The interactions between insecticide resistance in insect vector and the transmission of plant pathogen, however, are largely unknown. In this study, we assessed the effects of spinosad resistance on TSWV transmission using a pair of near-isogenic lines of susceptible (Ivf03) and resistant (NIL-R) F. occidentalis. NIL-R had a prolonged pre-adult stage, but a shorter adult life span than Ivf03. More importantly, the pupation rate and sex ratio (female/male) in NIL-R were significantly reduced in comparison with Ivf03. When given a shorter acquisition access period (AAP) of 6 h, virus propagation and transmission efficiency in NIL-R were significantly higher than Ivf03. In contrast, a longer AAP of 96 h led to a similar virus acquisition and transmission efficiency for both strains, although TSWV replication was greater in NIL-R. Our combined results suggest that (1) substantial fitness costs (e.g., reduced pupation rate) are associated with spinosad resistance in F. occidentalis; however, (2) insecticide resistance increases vector competence.",

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AB - The western flower thrips, Frankliniella occidentalis, is the most efficient vector for Tomato spotted wilt orthotospovirus (TSWV), a devastating plant pathogen. Insecticide resistance is a common issue in pest management. The interactions between insecticide resistance in insect vector and the transmission of plant pathogen, however, are largely unknown. In this study, we assessed the effects of spinosad resistance on TSWV transmission using a pair of near-isogenic lines of susceptible (Ivf03) and resistant (NIL-R) F. occidentalis. NIL-R had a prolonged pre-adult stage, but a shorter adult life span than Ivf03. More importantly, the pupation rate and sex ratio (female/male) in NIL-R were significantly reduced in comparison with Ivf03. When given a shorter acquisition access period (AAP) of 6 h, virus propagation and transmission efficiency in NIL-R were significantly higher than Ivf03. In contrast, a longer AAP of 96 h led to a similar virus acquisition and transmission efficiency for both strains, although TSWV replication was greater in NIL-R. Our combined results suggest that (1) substantial fitness costs (e.g., reduced pupation rate) are associated with spinosad resistance in F. occidentalis; however, (2) insecticide resistance increases vector competence.

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Insecticide resistance increases the vector competence: a case study in Frankliniella occidentalis

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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